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P1 · Aerospace / industrial services · 3–10 yearsPublished investment brief

Aircraft aftermarket scarcity

Years of under-delivery of new aircraft have pushed the average global fleet age toward thirteen years while backlogs sit at record levels, forcing airlines to keep older aircraft flying and spend heavily on maintenance, spare parts, leased engines and used serviceable material. That scarcity is showing up directly in H1 2026 results across the value chain: GE Aerospace commercial services grew 26%, Safran civil spare parts grew 29.3% in USD, Pratt & Whitney commercial aftermarket grew 19%, and independent players HEICO, TransDigm, AAR, StandardAero, VSE and FTAI all printed double-digit growth with several guidance raises. The theme is investable because certification barriers, engine shop capacity and skilled-labor scarcity make aftermarket supply slow to expand, sustaining pricing power for several years even as new-aircraft deliveries recover. The main caveat is that H1 2026 delivery data show the strongest output since 2018-2019, so the acute-scarcity phase is maturing rather than beginning.

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Reviewed research brief · researched 2026-07-29 · not an individual investment recommendation
Sourced indicators
10
Mapped companies
13
Scenarios
3
Cited sources
16
Thesis breaks
5
Open questions
7
Investment case

Why this theme may be investable

Aircraft delivery delays, aging fleets and engine durability problems shift value toward maintenance, alternative parts, repairs and used serviceable materials.

Why now

The scarcity economics are measurable in current prints: IATA quantified the 2025 cost of supply-chain dysfunction to airlines at more than $11 billion, Oliver Wyman measured 2025 global MRO demand at $136 billion (+8% year over year, published February 2026), and the Q1/Q2 2026 reporting season delivered the strongest aftermarket growth of the cycle — GE internal shop visit revenue +25% and spare parts +25% (Q2 2026, reported 2026-07-16), Safran civil spare parts +29.3% in USD (Q1 2026, reported 2026-04-23), Pratt & Whitney commercial aftermarket +19% (Q1 2026, reported 2026-04-21). At the same time, H1 2026 deliveries (Airbus 351, best since 2019; Boeing 314, best since 2018) show supply beginning to normalize, which means the window to underwrite the theme is now — entry later in the decade faces decelerating growth and mid-term shop-visit declines that Rolls-Royce already guides to.

Source of pricing power

Regulatory certification (FAA/EASA part and repair approvals) creates sole-source or few-source positions in proprietary components and PMA parts; engine shop capacity is physically constrained and slow to add (Rolls-Royce is targeting only ~20% network capacity growth over the mid-term after a 50% increase in large-engine shop visits over three years); specialist labor is scarce (about 41% of U.S. certified mechanics are over 60, with ~45,000 retirements projected over the next decade per Oliver Wyman); and spare/lease engines are rationed while shop turnaround times stay long — IATA puts 2025 surplus engine leasing costs alone at $2.6 billion.

Duration and maturity

Mid-cycle and maturing. The structural demand layer (aging fleet, engine-heavy MRO mix) supports growth through the 2026-2036 forecast window (Oliver Wyman projects MRO demand reaching ~$193 billion by 2036, ~3.3% CAGR). But the cyclical excess-pricing layer — aftermarket growth running at 19-33% versus a ~3% long-run market CAGR — likely peaks between 2025 and 2028 as deliveries recover (H1 2026 was the best first half since 2018-2019) and time-on-wing programs mature (Rolls-Royce guides shop visits falling to 1,300-1,400 mid-term from 1,480-1,550 guided for 2026). A 3-10 year horizon fits, with the richest economics front-loaded in years 1-3.

Causal chain

How the change becomes cash flow

  1. New aircraft deliveries fell roughly 30% below pre-COVID peaks (1,254 jets delivered in 2024) while order backlogs swelled to a record ~17,000 jets, so airlines cannot refleet on schedule (IATA).
  2. The installed fleet ages and works harder: average global fleet age approached thirteen years in 2025, about a year and a half older than in 2024, with utilization at new highs (Oliver Wyman).
  3. Older aircraft plus durability problems on new-generation engines (GTF powder-metal inspections, LEAP/CFM56 workscope growth) drive more frequent, longer and costlier engine shop visits.
  4. Engine shop slots, certified parts, specialist labor and spare/lease engines become the binding constraints — IATA estimates supply-chain problems cost airlines over $11 billion in 2025, including $2.6 billion in surplus engine leasing costs.
  5. Scarcity confers pricing power on OEM spares and service agreements, sole-source proprietary components, approved alternative (PMA) parts, MRO slots and spare-engine owners.
  6. Aftermarket revenue and margins across the chain compound faster than fleet growth, evidenced by 19-33% aftermarket growth rates reported in Q1/Q2 2026 by GE, Safran, RTX, MTU, HEICO, TransDigm, AAR, VSE and FTAI.
  7. Value persists until deliveries normalize and engine time-on-wing improves; both are underway (best first-half deliveries since 2018-2019; Rolls-Royce guides shop visits down to 1,300-1,400 in the mid-term), which bounds the excess-return window.
Market evidence

Dated, sourced indicators

Freshness is strong: ten of the sixteen sources are company earnings releases dated between February and July 2026, including two (GE, AAR) published within the week before research date 2026-07-22. Market-size and fleet-age figures come from Oliver Wyman's February 2026 forecast (consultancy estimate, secondary) and IATA's supply-chain program page (industry association, primary but undated page whose figures reference 2024-2025). Delivery data come from Airbus's own orders-and-deliveries page (primary, June 2026) and a trade-press summary of Boeing's June 2026 delivery report (secondary; Boeing's IR and SEC pages returned HTTP 403 to our fetcher). All indicator figures were taken from pages fetched on 2026-07-22; no figures are cited from memory. Company aftermarket growth rates are as-reported and not independently reconciled to filings.

Market context: Global commercial aviation MRO demand was $136 billion in 2025, up 8% from $126 billion in 2024, and is forecast to reach approximately $193 billion by 2036 (about 3.3% CAGR), nearly double the 2019 level. Engine maintenance is identified as the largest and fastest-growing segment. This is a consultancy estimate rather than a government or filing figure. ( as of 2025 actual / 2036 forecast, published 2026-02)[13]

  • Aircraft delivery shortfall and backlog1,254 jets delivered in 2024, about 30% below pre-COVID peaks; order backlog at a record ~17,000 jets aircraft
    as of 2024, per IATA page accessed 2026-07-22 · Global[1]
  • Cost of supply-chain dysfunction to airlinesMore than $11 billion in 2025: $4.2B delayed fuel savings from older aircraft, $3.1B elevated maintenance on aging fleets, $2.6B surplus engine leasing costs, $1.4B excess spare-parts inventory USD billions
    as of 2025 estimate · Global[1]
  • Average global fleet ageApproached thirteen years in 2025, roughly a year and a half older than in 2024, with utilization at new highs; ~41% of U.S. certified mechanics are over 60 and ~45,000 retirements are projected over the next decade years
    as of 2025, published 2026-02 · Global / US labor data[13]
  • Airbus H1 2026 deliveries and cumulative backlog351 commercial aircraft delivered January-June 2026 (89 in June); cumulative orders of 26,331 versus 17,109 delivered imply a backlog of roughly 9,200 aircraft aircraft
    as of 2026-06, page accessed 2026-07-22 · Global[2]
  • Boeing H1 2026 deliveries314 commercial aircraft in H1 2026, up 12% from 280 in H1 2025 and the strongest first half since 2018; 737 monthly production moving from 42 toward 47 aircraft
    as of 2026-06, reported 2026-07 · Global[3]
  • GE Aerospace commercial services growthCommercial Engines & Services revenue $9.7B, +27% YoY; services +26%; internal shop visit revenue +25% with record internal shop visit output; spare parts revenue +25%+; FY2026 CES revenue guidance raised to ~20% growth percent YoY
    as of Q2 2026 (quarter ended 2026-06-30), reported 2026-07-16 · Global[14]
  • Safran civil aftermarket growthCivil spare parts revenue +29.3% in USD and civil services revenue +43.1% in USD in Q1 2026, driven by workscope mix and rising LEAP shop visits; LEAP deliveries 520 units, +63% YoY percent YoY
    as of Q1 2026, reported 2026-04-23 · Global[7]
  • Rolls-Royce large-engine activityLarge engine flying hours +8% in 2025; 2026 guidance of 115-120% of 2019 levels and 1,480-1,550 total shop visits; shop visits up more than 50% over three years with capacity added in Derby, Dahlewitz and Singapore; mid-term guide of shop visits falling to 1,300-1,400 on time-on-wing gains flying hours / shop visits
    as of FY2025, reported 2026-02-26 · Global[6]
  • MTU commercial MRO growth and mixCommercial MRO revenue +20% in USD (+8% in EUR to ~€1.6B) in Q1 2026; geared turbofan ~44% of commercial maintenance; MRO output +23% with turnaround times improving; order backlog €31.6B percent YoY / EUR
    as of Q1 2026, reported 2026-04-30 · Global[8]
  • Pratt & Whitney and Collins aftermarket growthPratt & Whitney commercial aftermarket sales +19% YoY (segment sales $8.17B, +11%); Collins commercial aftermarket +7% on provisioning, parts and repair; RTX backlog $271B including $162B commercial percent YoY
    as of Q1 2026, reported 2026-04-21 · Global[9]
Investment transmission

Who captures the economics

Business models

  • Engine OEM razor-and-blade: place engines at low or negative margin, capture value through spare parts, time-and-material shop visits and long-term service / rate-per-flight-hour agreements (GE, Safran/CFM, Rolls-Royce, Pratt & Whitney)
  • Sole-source proprietary aerospace components with certification-protected aftermarket pricing (TransDigm)
  • FAA-approved alternative parts (PMA) and component repairs priced at a discount to OEM catalog but at high margin (HEICO Flight Support)
  • Independent engine and component MRO selling scarce shop capacity (StandardAero, MTU commercial MRO, AAR repair)
  • Aftermarket parts distribution and used serviceable material (USM) trading (AAR Parts Supply, VSE Aviation)
  • Engine ownership, leasing and module exchange monetizing green time and spare-engine scarcity (FTAI, AerCap engine portfolio)

Bottlenecks and scarce assets

  • Engine shop-visit capacity and induction slots (Rolls-Royce added capacity in Derby, Dahlewitz, Singapore and JVs in Beijing and Istanbul; StandardAero/MTU ramping LEAP/CFM56 lines)
  • Certified parts supply, including castings, forgings and superalloy/titanium inputs (IATA and Oliver Wyman both flag raw-material shortages)
  • Specialist MRO labor (~41% of U.S. certified mechanics over 60; ~45,000 retirements expected over a decade)
  • Regulatory repair and parts approvals (PMA, DER repairs) that gate entry of alternatives
  • Spare and lease engines — $2.6 billion of 2025 surplus engine leasing costs per IATA; FTAI/AerCap own the scarce pools
  • Used serviceable material feedstock, constrained by low retirement rates while airlines keep old aircraft flying

Financial transmission

Scarcity converts into financials through three channels. First, price/mix: OEM spare parts and proprietary components carry catalog pricing power, visible in GE raising FY2026 CES guidance to ~20% growth, TransDigm's 52.6% EBITDA As Defined margin, and HEICO's operating margin expanding to 25.5% from 22.6%. Second, volume/utilization: shop visits and flying hours compound (Rolls-Royce large-engine flying hours +8% in 2025; MTU MRO output +23% in Q1 2026), filling capacity ahead of expansion and improving absorption, though shops give back margin during ramps (StandardAero -130bps). Third, asset values and cash flow: scarce engines appreciate, driving AerCap's 24% unlevered gain-on-sale margins and FTAI's 104% Aerospace Products growth, while OEM services books throw off cash (Rolls-Royce free cash flow £3.3 billion in 2025; GE free cash flow $3.0 billion in Q2 2026 alone, +43%). Balance-sheet effects include heavier inventory across distributors (IATA estimates $1.4 billion excess industry stockpiling) and acquisition-led balance-sheet expansion at consolidators (VSE's $2.025 billion Precision Aviation Group deal; HEICO's four acquisitions in H1 FY2026).

Value chain

Where value is retained

  • Engine OEMs and their spares/services franchisesretains value

    GE/CFM (with Safran), Rolls-Royce and Pratt & Whitney control certified spare parts and dominate shop-visit content for the installed fleet; LTSA/RPFH books grow with flying hours. Evidence: GE CES +27% with services +26% (Q2 2026); Safran civil spares +29.3% USD (Q1 2026); Rolls-Royce Civil Aerospace operating margin 20.5% in 2025.

  • Proprietary component and PMA parts suppliersretains value

    TransDigm (sole-source components, EBITDA As Defined margin 52.6% in Q2 FY2026) and HEICO (PMA parts and repairs, Flight Support operating income +31% in Q2 FY2026) capture pricing power from certification barriers, on opposite sides of the OEM-price/alternative-price trade.

  • Independent and OEM-network engine MRO shopsuncertain

    StandardAero, MTU and AAR supply scarce slot capacity, but parts pass-through and ramp costs compress margins: StandardAero adjusted EBITDA margin 12.5% (down 130bps on LEAP/CFM56 ramp), MTU commercial MRO adjusted EBIT margin 8.0% versus 30.2% in its OEM business. Volume is booming; unit economics are structurally thinner than parts.

  • Parts distribution and used serviceable materialvolume only

    AAR (Parts Supply +39% in Q4 FY2026) and VSE (distribution +26%, repair +28% in Q1 2026) monetize availability and breadth. Margins are mid-teens EBITDA at best (AAR 12.5%, VSE 17.1%); scarcity lifts volumes and inventory gains more than durable pricing power.

  • Engine and aircraft leasing / module tradingretains value

    FTAI (Aerospace Products revenue +104%, EBITDA +70% in Q1 2026 on CFM56 module exchanges) and AerCap (87% lease extension rate, 24% unlevered gain-on-sale margin, guidance raised) capture scarcity through asset values, extension pricing and green-time monetization.

  • Airlines (cost bearers)volume only

    Airlines absorb the theme's costs — IATA estimates more than $11 billion in 2025 across fuel penalties, maintenance, engine leasing and inventory — making them the funding source of aftermarket economics rather than beneficiaries.

Scenarios

Base, upside, and downside

base

Deliveries keep recovering along the H1 2026 trajectory (Airbus 351 and Boeing 314 in H1, both multi-year highs) but backlogs near ~9,200 aircraft at Airbus alone mean fleet renewal stays slow; average fleet age plateaus near thirteen years. Engine shop visits stay at or near peak through 2027-2028 (Rolls-Royce guides 1,480-1,550 visits in 2026) before time-on-wing programs bend the curve. Aftermarket growth decelerates from the current 19-33% prints toward high single digits, still comfortably above the ~3.3% long-run MRO CAGR, and aftermarket franchises compound earnings with modest multiple give-back.

Measurable triggers

  • Airbus/Boeing monthly deliveries continue rising but backlog-to-delivery ratios stay above ~8 years
  • OEM aftermarket growth decelerates to low-teens/high-single-digit by 2027 while remaining positive
  • Rolls-Royce 2026 shop visits land within the guided 1,480-1,550 range

Likely beneficiaries: GE Aerospace; Safran; HEICO; TransDigm; StandardAero; MTU Aero Engines; AAR; VSE; FTAI; Rolls-Royce

Likely losers: Airlines bearing elevated maintenance and leasing costs; Late-cycle entrants adding MRO capacity that opens into decelerating demand

upside

Engine durability problems persist longer than planned — GTF powder-metal inspection workload and LEAP early-life shop visits keep engines off wing, spare-engine scarcity worsens, and delivery recovery stalls on supply-chain or quality setbacks. Parts and slot pricing extend their run; the 2025 pattern of $11B+ annual airline supply-chain costs repeats through 2027-2028. Aftermarket growth stays in the high-teens or above for another two to three years, and scarce-asset owners (FTAI, AerCap, engine OEM services books) see continued asset appreciation and guidance raises.

Measurable triggers

  • GTF/LEAP shop-visit workscopes or turnaround times deteriorate versus 2026 plans
  • Boeing/Airbus monthly deliveries flatline or fall for two-plus consecutive quarters
  • Engine lease rates and USM prices re-accelerate; IATA-style cost estimates for 2026 exceed the 2025 $11B figure

Likely beneficiaries: FTAI; AerCap; GE Aerospace; Safran; MTU Aero Engines; StandardAero; HEICO; TransDigm; AAR; VSE

Likely losers: Airlines; Boeing/Airbus delivery-dependent suppliers; Pratt & Whitney/RTX to the extent GTF compensation and inspection costs escalate (gross impact previously sized at $6-7B)

downside

Normalization accelerates on both axes. Deliveries extend the H1 2026 surge (best since 2018-2019) toward pre-COVID run-rates, retiring old aircraft faster and releasing USM feedstock; simultaneously time-on-wing programs work (Rolls-Royce targets shop visits down to 1,300-1,400 mid-term; CFM/GTF durability fixes mature) and MRO capacity added since 2024 (Rolls-Royce +20% network target, StandardAero/MTU/VSE expansions) opens into softening demand. Aftermarket growth compresses toward the ~3% structural CAGR, margins mean-revert at shops and distributors, and richly-valued aftermarket equities de-rate. A demand shock to air travel would compound the effect by cutting flying hours directly.

Measurable triggers

  • Combined Airbus+Boeing deliveries annualize above ~1,400 aircraft
  • OEM spare-parts growth decelerates below mid-single digits for two consecutive quarters
  • Shop-visit guidance cuts or MRO turnaround times shorten materially (MTU already reports improved supply chain and +23% output)
  • Aircraft retirements and part-outs accelerate, deflating USM and engine values

Likely beneficiaries: Airlines; AerCap partially (new-aircraft order book of 110 A320neos delivers into demand); Boeing/Airbus

Likely losers: HEICO; TransDigm; StandardAero; AAR; VSE; FTAI; MTU; GE/Safran/RR services growth rates; Late capacity adders

Valuation and cycle context: This brief did not fetch market-price or multiple data, so no statement is made about absolute valuation levels. What the fetched operating evidence supports: (1) the sector is being re-underwritten upward in real time — GE (2026-07-16), TransDigm (2026-05-05), StandardAero (2026-05-07), VSE (2026-05-05), AerCap (2026-04) and RTX (2026-04-21) all raised 2026 guidance during the covered period, and HEICO printed +49% net income (Q2 FY2026), so consensus expectations now embed continued strength; (2) current aftermarket growth of 19-33% runs roughly six to ten times the ~3.3% long-run MRO market CAGR that Oliver Wyman forecasts (published 2026-02), implying today's growth is cyclically elevated and mean-reversion risk sits in any multiple paid for it; (3) the cycle clock is observable — H1 2026 deliveries were the strongest since 2018 (Boeing, 314 aircraft) and 2019 (Airbus, 351 aircraft), and Rolls-Royce already guides mid-term shop visits below 2026 levels (1,300-1,400 versus 1,480-1,550), so the scarcity premium has a visible expiry mechanism even though backlogs (~9,200 aircraft at Airbus, June 2026) stretch normalization over many years. Valuation work at the company level remains open diligence.

Catalysts

Dated catalysts

  • 2026-07-28 to 2026-08 (H2 2026 earnings season)

    Q2 2026 reports from RTX, Rolls-Royce (half-year), MTU, Safran (H1), HEICO (Q3 FY2026) and TransDigm (Q3 FY2026) will show whether the 19-33% aftermarket growth rates seen in Q1 persist; RTX's Q1 release (2026-04-21) already set raised FY2026 guidance that Q2 must validate.[9]

  • Monthly, 2026-07 through 2026-12

    Airbus and Boeing monthly orders-and-deliveries updates: sustained delivery acceleration beyond the H1 run-rate (Airbus 351, Boeing 314) is the primary observable that would begin dating the scarcity premium; Airbus's own page updates monthly.[2]

  • 2026-10 (GE Q3 2026 report)

    Test of GE's raised FY2026 guidance (CES revenue ~+20%, services low-20s growth, operating profit $10.25-10.35B) — a beat-and-raise would confirm aftermarket durability into 2027; a services deceleration would be an early inflection signal.[14]

  • 2027 (full-year 2026 results, expected 2027-02)

    Rolls-Royce FY2026 results will report actual 2026 shop visits against the guided 1,480-1,550 range and progress on time-on-wing initiatives that underpin its mid-term guide of 1,300-1,400 visits — the clearest published marker of when engine-shop scarcity peaks.[6]

  • 2026-H2 through 2027

    Integration and reported contribution of consolidation moves closed in H1 2026 — VSE's $2.025B Precision Aviation Group acquisition (closed 2026-05-05) and NorthStar (2026-04-01) — will show whether aftermarket M&A economics persist at scale.[10]

  • Later 2026 filings

    FTAI's later filings can be compared with the Q1 2026 baseline of $743.815 million in Aerospace Products segment revenue to test whether engine and module demand persists and whether growth converts into segment profit and cash flow.[11]

Monitoring dashboard

  • quarterlyEngine shop visit counts and internal shop-visit revenue growth (GE, Rolls-Royce, MTU, StandardAero disclosures)
  • monthlyAirbus and Boeing monthly orders, deliveries and backlog (Airbus O&D page; Boeing delivery reports)
  • quarterlyCivil spare-parts revenue growth in USD (Safran) and spare-parts/commercial-aftermarket growth (GE, RTX, HEICO FSG organic)
  • annualMRO labor and material constraint surveys (Oliver Wyman annual forecast, ARSA/IATA publications)
  • quarterlyGTF fleet status: aircraft-on-ground counts, inspection turnaround times, compensation charges (RTX disclosures)
  • quarterlyLease extension rates, engine lease rates and gain-on-sale margins (AerCap, FTAI reports)
  • semiannualIATA supply-chain cost estimates and fair-competition/PMA policy initiatives
Risks and disconfirming evidence

What breaks this thesis

Material risks

  • Delivery normalization is already underway: H1 2026 was Boeing's best first half since 2018 (+12% YoY) and Airbus's best since 2019 (+15%), with easing engine-supply bottlenecks cited — faster-than-expected recovery compresses the scarcity premium.
  • Engine durability improvement is an explicit OEM program: Rolls-Royce guides shop visits down to 1,300-1,400 mid-term on time-on-wing gains; success on GTF and LEAP fixes would cut shop-visit growth and spare-parts demand.
  • MRO capacity is expanding on many fronts simultaneously (Rolls-Royce ~20% network capacity target plus Beijing and Istanbul JVs; StandardAero LEAP/CFM56 ramp; MTU output +23%; VSE/AAR capacity additions) — capacity arriving into decelerating demand would compress slot pricing and margins.
  • Margin structure is uneven: MRO shops earn 8-12.5% margins versus 30%+ for OEM parts, so volume growth does not guarantee value capture for all names mapped to the theme.
  • Air-travel demand shock (recession, geopolitics, fuel) would cut flying hours — the single variable that drives shop visits, spares and RPFH billings simultaneously; AerCap explicitly flagged geopolitical developments in Q1 2026.
  • Concentration of current growth in catch-up effects: Safran attributes part of its +29.3% spares growth to a favorable workscope mix against a weak CFM56 comparison base — base effects fade mechanically.
  • Policy/OEM pushback on aftermarket economics: IATA is actively campaigning for fair competition in aftermarket services and broader acceptance of alternative parts, and lessor contract restrictions on PMA parts could loosen — positive for airlines and HEICO, negative for OEM spares pricing.
  • Acquisition-driven growth at consolidators (HEICO four deals in H1 FY2026, VSE $2B+ PAG deal) adds integration and leverage risk on top of cyclical exposure.
  • GTF litigation/compensation overhang: Airbus formally seeking damages from Pratt & Whitney (per March 2026 trade reporting surfaced in search, unverified against filings) could shift economics between OEM and airframer rather than to aftermarket suppliers.

Thesis-break conditions

  • Combined Airbus+Boeing deliveries sustain an annualized run-rate above ~1,400 aircraft (versus 665 in H1 2026) for two consecutive quarters — delivery normalization break.
  • Rolls-Royce reports or guides shop visits at or below 1,400 before 2028, or GE/Safran report civil spare-parts growth below 5% YoY for two consecutive quarters — engine durability / demand break.
  • Average global fleet age (Oliver Wyman or IATA data) declines year-over-year, indicating retirements and refleeting are outpacing aging — fleet-renewal break.
  • MRO turnaround times and slot lead-times shorten industry-wide while shop margins compress (e.g., StandardAero and MTU MRO margins falling despite volume growth for three-plus quarters) — capacity-overshoot break.
  • Engine lease rates and USM prices fall year-over-year alongside declining gain-on-sale margins at AerCap/FTAI — scarce-asset deflation break.

Unresolved questions

  • What is the current (mid-2026) count of GTF-powered aircraft on ground and the expected inspection completion date? RTX's Q1 2026 release did not quantify it and Q2 2026 results were not yet published at research date.
  • How has the record ~17,000-jet industry backlog figure (IATA, 2024 vintage) evolved through mid-2026 across both OEMs? Boeing's own backlog page could not be fetched (HTTP 403), so only Airbus's ~9,200-aircraft backlog is directly sourced.
  • What share of HEICO Flight Support revenue is PMA parts versus repairs and distribution, and what is PMA's penetration of the total parts market? Not disclosed in the fetched release.
  • What portion of AAR's Parts Supply growth is USM versus new-parts distribution? The fetched release did not break out USM.
  • What are current spot engine lease rates and USM price indices? No primary pricing series was fetched; pricing power is currently inferred from company revenue/margin prints.
  • How much of FY2026 aftermarket growth at Safran/GE is base-effect and workscope mix versus underlying volume? Requires shop-visit unit counts not in the fetched releases.
  • Company-level valuation multiples and embedded expectations were not researched and remain open diligence.
Researched company map

13 assessed companies

Every mapped company is assessed with evidence-qualified exposure. Materiality is claimed only where disclosure supports it.

Engine OEM with a large installed base; captures aftermarket demand through spare parts, shop visits and long-term service agreements.

GE Aerospace GE

High and direct. Q2 2026 Commercial Engines & Services revenue was $9.7 billion, up 27%; services grew 26%, internal shop-visit revenue grew 25%, and spare-parts revenue grew more than 25%.

Evidence
GE Aerospace's official Q2 2026 release directly reports CES revenue, services, shop-visit and spare-parts growth. It does not isolate price, workscope and volume contributions or provide licensed current valuation.
Materiality
disclosed — Commercial Engines & Services and its service metrics are separately reported, establishing direct and financially material aftermarket exposure.
Investability view
Commercial Engines & Services and its service metrics are separately reported, establishing direct and financially material aftermarket exposure. Shop-visit count versus workscope and price, contract-level service economics, licensed current valuation and reviewer acceptance remain unresolved.

Next diligence: Decompose shop-visit growth into count, workscope and price; track LEAP time-on-wing improvements and complete licensed valuation before human review.

Aftermarket replacement-parts, specialty-products, and repair-and-overhaul supplier through Flight Support Group.

HEICO HEI

High and direct. Q2 FY2026 consolidated net sales were $1,375.7 million, up 25%; Flight Support Group sales were $929.4 million, up 21%, with 19% organic growth driven by aftermarket replacement parts, specialty products, and repair and overhaul services.

Evidence
HEICO's Q2 FY2026 Form 10-Q directly reports consolidated and FSG results and identifies both HEI and HEI.A as securities of the same issuer. It does not disclose PMA-only revenue or licensed current valuation.
Materiality
disclosed — Flight Support Group represented about 68% of Q2 FY2026 consolidated sales and disclosed 19% organic growth, establishing material aftermarket exposure.
Investability view
Flight Support Group represented about 68% of Q2 FY2026 consolidated sales and disclosed 19% organic growth, establishing material aftermarket exposure. PMA-only revenue and margin, acquisition-normalized durability, licensed current valuation and reviewer acceptance remain unresolved.

Next diligence: Quantify PMA-only economics, acquisition contribution and customer adoption; complete licensed valuation before human review.

Class A security of HEICO Corporation; it represents the same consolidated aftermarket operations as HEI and is not a separate operating issuer.

HEICO Class A HEI.A

High and direct at the issuer level. HEI.A and HEI are two NYSE-listed classes of HEICO Corporation and therefore share the same consolidated Q2 FY2026 results, including $929.4 million of Flight Support Group sales and 19% organic growth.

Evidence
HEICO's Q2 FY2026 Form 10-Q lists both HEI and HEI.A under the same CIK and consolidated issuer. No independent operating financials exist for HEI.A; security-specific voting, liquidity and valuation analysis remains blocked.
Materiality
disclosed — Operating materiality is inherited from the same consolidated issuer, not counted as a second issuer. The canonical subject remains a separate security record solely to preserve the 193-company denominator.
Investability view
Operating materiality is inherited from the same consolidated issuer, not counted as a second issuer. The canonical subject remains a separate security record solely to preserve the 193-company denominator. Share-class voting differential, liquidity, price discount, licensed current valuation and reviewer acceptance remain unresolved; no separate operating-company claim is permitted.

Next diligence: Obtain official share-class voting terms and licensed liquidity and valuation data; prevent issuer-level double counting before human review.

Supplier of highly engineered, predominantly proprietary aircraft components with substantial commercial and military aftermarket exposure.

TransDigm Group TDG

High and direct. Q2 FY2026 net sales were $2,544 million, up 18.3%; organic sales grew 11.0%, commercial transport aftermarket grew about 16%, and EBITDA As Defined was $1,337 million at a 52.6% margin.

Evidence
TransDigm's SEC-filed Q2 FY2026 release directly supports the current results and aftermarket growth. Its FY2025 Form 10-K reports approximately 55% of sales from aftermarket channels; current licensed valuation remains unavailable.
Materiality
disclosed — The FY2025 Form 10-K quantifies aftermarket at approximately 55% of sales and the Q2 release quantifies current commercial aftermarket growth, establishing direct materiality.
Investability view
The FY2025 Form 10-K quantifies aftermarket at approximately 55% of sales and the Q2 release quantifies current commercial aftermarket growth, establishing direct materiality. Aftermarket price versus volume and acquisition contribution, customer-level concentration by channel, licensed current valuation and reviewer acceptance remain unresolved.

Next diligence: Separate price, volume and acquisition effects in aftermarket growth; monitor customer or regulatory pressure and complete licensed valuation before human review.

Independent engine MRO (CF34, CFM56, LEAP ramp; business aviation and military platforms) selling scarce shop capacity.

StandardAero SARO

High and direct, with margin caveats. Q1 2026 (reported 2026-05-07): revenue $1,626.9M +13.3%; Engine Services $1,447.1M +14.1% driven by LEAP and CFM56 ramp; Component Repair Services +7.4% at a 29.2% EBITDA margin; consolidated adjusted EBITDA margin 12.5%, down 130bps on ramp mix; FY2026 guidance raised to revenue $6,325-6,450M.

Evidence
Company IR release fetched directly. Revenue exposure to engine aftermarket is near-total; the margin dilution during LEAP/CFM56 ramp is disclosed and demonstrates the volume-versus-value-capture tension for MRO shops.
Materiality
disclosed — Segment revenue and platform-level commentary are disclosed; essentially all revenue is aftermarket services, per the fetched release.
Investability view
A direct volume play on shop-visit scarcity whose economics improve as ramp programs mature; the analytical question is terminal margin once LEAP/CFM56 lines reach productivity, and how demand looks when those inductions peak.

Next diligence: Model Engine Services margin trajectory as LEAP/DFW lines mature; obtain shop-capacity and slot-backlog indicators from filings and calls.

Independent MRO, new-parts distribution and used serviceable material supply; software (Trax) adds recurring aftermarket revenue.

AAR Corp. AIR

High and direct. FY2026 (year ended 2026-05-31, reported 2026-07-21): sales $3.3B +19% (organic 13-14%); Q4 Parts Supply $423.8M +39% with new-parts distribution +19% organic; Repair, Engineering & Software $314.4M +35% on component MRO and airframe volumes; adjusted EPS $5.05 +29%; adjusted EBITDA margin 12.5%. Management described the platform as 'a more durable, higher-growth, and higher-margin aviation aftermarket services platform.'

Evidence
Official AAR release and FY2026 filing support the segment results. USM specifically was not broken out in the release, so the USM leg of the hypothesis rests on segment structure rather than quantified disclosure.
Materiality
disclosed — Parts Supply and RE&S segment sales and growth are disclosed; nearly all revenue is aftermarket-linked. USM sub-mix is the only estimated element.
Investability view
Broad mid-cap aftermarket exposure across parts, repair and software with disclosed acceleration; thinner margins than parts franchises mean the theme transmits primarily through volume and scale rather than pricing power.

Next diligence: Break out USM versus distribution economics from the 10-K; assess whether Q4 FY2026's +39% Parts Supply growth includes inventory or program one-offs.

Largest independent engine MRO network plus OEM risk-share partner (GTF program); spare parts business on V2500/GTF.

MTU Aero Engines MTX.DE

High and direct. Q1 2026 (reported 2026-04-30): commercial MRO revenue ~€1.6B, +8% in EUR and +20% in USD; geared turbofan work ~44% of commercial maintenance; MRO output +23% with turnaround times improving; commercial spare parts organic growth ~10% in USD; order backlog €31.6B. Commercial MRO adjusted EBIT margin was 8.0% versus 30.2% in the OEM business — the clearest disclosed evidence that MRO volume and parts value capture are different economics.

Evidence
Company press release fetched directly from mtu.de. Currency translation materially affects reported EUR growth; USD-basis figures better reflect underlying activity.
Materiality
disclosed — MTU discloses commercial MRO revenue, GTF share of MRO, spare-parts growth and segment margins in the fetched release.
Investability view
Direct exposure to the GTF shop-visit wave with a disclosed margin trade-off: the MRO book grows fastest where margins are thinnest, while the OEM/spares book carries the value. EUR reporting adds translation noise for USD-based theme tracking.

Next diligence: Track GTF shop-visit mix and contract structure (time-and-material versus flat-rate) and the EUR/USD translation effect on 2026 guidance.

Widebody engine OEM whose Civil Aerospace economics run through LTSA flying-hour billings and shop visits on the Trent fleet.

Rolls-Royce Holdings RR.L

High and direct. FY2025 (reported 2026-02-26): Civil Aerospace underlying operating margin 20.5% (from 16.6%); large engine flying hours +8% in 2025, guided to 115-120% of 2019 levels in 2026; shop visits guided to 1,480-1,550 in 2026 after a >50% increase over three years; MRO capacity expanded in Derby, Dahlewitz, Singapore plus Beijing (BAESL) and Istanbul (Turkish Technic, by end-2027) JVs; group FY2026 guidance £4.0-4.2B underlying operating profit.

Evidence
Company press release fetched directly. Note the two-sided evidence: current shop-visit intensity supports the theme, but management's own mid-term guide of 1,300-1,400 visits on time-on-wing gains is a disclosed, dated path to demand moderation.
Materiality
disclosed — Civil Aerospace segment results, flying-hour indices and shop-visit counts are disclosed in the fetched FY2025 release.
Investability view
Strong current expression of widebody aftermarket intensity whose own guidance embeds the thesis-break (fewer shop visits mid-term); exposure quality therefore depends on whether LTSA pricing and capacity utilization offset declining visit counts.

Next diligence: Review H1 2026 results (expected late July 2026) for shop-visit run-rate and LTSA balance growth; assess LTSA margin recognition mechanics from the annual report.

Co-owner of CFM (CFM56/LEAP) with GE; narrowbody spares and services franchise plus equipment aftermarket.

Safran SAF.PA

High and direct. Q1 2026 (reported 2026-04-23): adjusted revenue €8,624M +18.8% (organic +23.0%); Propulsion organic +33.1%; civil spare parts +29.3% in USD and civil services +43.1% in USD, driven by workscope mix, CFM56 comparison base and rising LEAP shop visits at third-party MROs; LEAP deliveries 520 (+63%); FY2026 revenue growth guided low-to-mid teens.

Evidence
Safran's Q1 2026 issuer release directly supports the reported metrics and attributes part of the spares increase to favorable workscope mix and a weak prior-year CFM56 comparison base.
Materiality
disclosed — Safran discloses civil aftermarket, spare-parts (USD) and services (USD) growth explicitly in its quarterly revenue release.
Investability view
Prime narrowbody-spares exposure as the CFM56 fleet ages through its heaviest shop-visit years and LEAP visits build; the disclosed base-effect component argues for underwriting deceleration from Q1's +29.3% rather than extrapolating it.

Next diligence: Track CFM56 shop-visit calendar (peak timing) and LEAP RPFH contract economics; review H1 2026 results (expected late July 2026) for spares growth normalization.

Diversified aerospace/defense parent of Pratt & Whitney (GTF/V2500 engines) and Collins Aerospace (components, provisioning, repair).

RTX RTX

Medium — meaningful but diluted. Q1 2026 (reported 2026-04-21): P&W sales $8,173M +11% with commercial aftermarket +19%; Collins commercial aftermarket +7%; adjusted segment profits up 21% and 6% respectively; company backlog $271B ($162B commercial); FY2026 sales guidance raised to $92.5-93.5B. Defense (Raytheon plus military engines/avionics) dilutes theme purity, and the GTF powder-metal program remains a cost as well as an aftermarket volume driver.

Evidence
RTX's Q1 2026 issuer release directly supports segment sales, commercial aftermarket growth, backlog, and outlook; the theme-linked share of total RTX profit is not separately reported.
Materiality
disclosed — Commercial aftermarket growth rates are disclosed per segment in the fetched release; the dilution judgment (medium exposure) is analytical, based on disclosed segment mix including large defense revenue.
Investability view
Aftermarket strength is real and disclosed, but investors acquire a conglomerate where defense drives much of the narrative; theme fidelity is materially lower than GE or Safran, and GTF remediation costs partially offset GTF aftermarket volumes.

Next diligence: Verify GTF financial-impact figures and AOG status from RTX filings and the Q2 2026 release (expected late July 2026); estimate P&W aftermarket as a share of total RTX EBIT.

Aviation aftermarket parts distribution and MRO for commercial, business and general aviation; scaling via acquisition (NorthStar, Precision Aviation Group).

VSE Corporation VSEC

High and direct. Q1 2026 (reported 2026-05-05): revenue $324.6M +26.8% with organic growth of 15% led by distribution (+26%) and repair (+28%); adjusted EBITDA $55.4M +37.4% at a 17.1% margin (+130bps); growth attributed to robust commercial engine aftermarket activity, new program execution and share gains; FY2026 revenue growth guidance raised to 57-61% reflecting the $2.025B PAG acquisition (closed 2026-05-05).

Evidence
VSE's Q1 2026 issuer release directly supports the metrics and separates 15% organic growth from acquisition-inclusive guidance; PAG integration economics require later filings.
Materiality
disclosed — Aviation aftermarket is the reported business; organic versus acquisition growth split and guidance mechanics are disclosed in the fetched release.
Investability view
Small/mid-cap pure-play on aftermarket distribution and repair with disclosed organic momentum; the theme signal is somewhat obscured by transformative M&A, making organic growth and integration execution the metrics that matter.

Next diligence: Track PAG integration metrics and pro-forma organic growth in Q2/Q3 2026 reports; assess leverage post-acquisition from the 10-Q.

Largest aircraft/engine lessor; monetizes scarcity through lease extensions, rising asset values, gains on sale and an engine-leasing portfolio.

AerCap Holdings AER

Medium — real but indirect. Q1 2026 (reported 2026-04-29): net income $818M ($4.96/share), adjusted $889M ($5.39/share); 87% lease extension rate; 41 assets sold for $1.5B at a 24% unlevered gain-on-sale margin; FY2026 adjusted EPS guidance raised to ~$14.50; new $1.0B buyback; CEO cited ongoing supply constraints supporting demand; 110 A320neos added to the order book and agreements for 48 LEAP-1A engines.

Evidence
AerCap's Q1 2026 issuer release directly supports the metrics and supply-constraint commentary. The scarcity benefit appears in extension rates and sale margins rather than a separately reported aftermarket revenue line.
Materiality
estimated — Scarcity transmission is evidenced by disclosed proxies (extension rate, gain-on-sale margin, management commentary) but the company does not report a theme-attributable revenue or profit line, so materiality is an estimate.
Investability view
A levered, indirect beneficiary: scarcity supports lease rates and residual values today, but AerCap's new-order book means it also benefits from delivery normalization — a partial hedge that lowers theme purity while reducing downside to a thesis break.

Next diligence: Review Q2 2026 results (expected late July 2026) and the engine-portfolio disclosure; estimate the sensitivity of gains-on-sale to used aircraft/engine price indices.

Independent engine-maintenance, module-exchange, repair, parts, and engine-leasing platform focused on CFM56-5B, CFM56-7B, and V2500 engines.

FTAI Aviation FTAI

High and direct. Q1 2026 Aerospace Products segment revenue was $743.815 million versus $365.063 million in Q1 2025, comprising $522.585 million of aerospace-products revenue and $221.230 million of MRE contract revenue.

Evidence
FTAI's Q1 2026 Form 10-Q directly supports the engine families, maintenance and exchange model, segment figures, and year-over-year drivers. It attributes most of the increase to CFM56 and V2500 engine and module sales; module-level margin and sustainable scarcity pricing are not disclosed.
Materiality
disclosed — Aerospace Products is a reportable segment with separately disclosed revenue; the filing describes its CFM56 and V2500 engine, module, parts, repair, and exchange activities.
Investability view
The filing establishes direct aftermarket exposure and rapid segment growth, but current valuation, module-level economics, customer concentration, engine-family concentration, and cash conversion remain unresolved.

Next diligence: Reconcile segment profit and cash conversion to inventory, MRE partnership activity, engine and module sales, customer concentration, repair throughput, and leverage; complete licensed valuation.

Source ledger

Every claim keeps its lineage

Primary sources are preferred; secondary sources are labeled. Access dates are recorded for every citation.

  1. Aviation Supply Chain (Technical Operations program page)IATA · primary · published undated page; content references 2024 deliveries and 2025 cost estimates · accessed 2026-07-22
  2. Orders and Deliveries (June 2026 data)Airbus · primary · published 2026-07 (June 2026 dataset) · accessed 2026-07-22
  3. Boeing posts strongest first-half aircraft deliveries since 2018AeroTime · secondary · published 2026-07 · accessed 2026-07-22
  4. StandardAero Announces First Quarter 2026 ResultsStandardAero, Inc. (Investor Relations) · primary · published 2026-05-07 · accessed 2026-07-22
  5. AAR reports fourth quarter and fiscal year 2026 resultsAAR CORP. · primary · published 2026-07-21 · accessed 2026-07-29
  6. Rolls-Royce Holdings plc 2025 Full Year ResultsRolls-Royce Holdings · primary · published 2026-02-26 · accessed 2026-07-22
  7. Safran reports first quarter 2026 revenue - Outstanding performance in civil engine activitiesSafran · primary · published 2026-04-23 · accessed 2026-07-22
  8. MTU Aero Engines starts 2026 with increase in revenue and earningsMTU Aero Engines · primary · published 2026-04-30 · accessed 2026-07-22
  9. RTX Reports Q1 2026 ResultsRTX Corporation · primary · published 2026-04-21 · accessed 2026-07-22
  10. VSE Corporation Announces First Quarter 2026 ResultsVSE Corporation (Investor Relations) · primary · published 2026-05-05 · accessed 2026-07-22
  11. FTAI Aviation Ltd. Q1 2026 Form 10-QU.S. Securities and Exchange Commission (EDGAR) · primary · published 2026-05-01 · accessed 2026-07-29
  12. AerCap Holdings N.V. Reports Record Financial Results for the First Quarter 2026, Raises 2026 Guidance and Announces New $1.0 Billion Share Repurchase ProgramAerCap Holdings (Investor Relations) · primary · published 2026-04-29 · accessed 2026-07-29
  13. Global Fleet And MRO Market Forecast 2026-2036: Key TrendsOliver Wyman · secondary · published 2026-02 · accessed 2026-07-22
  14. GE Aerospace Announces Second Quarter 2026 ResultsSEC EDGAR · primary · published 2026-07-16 · accessed 2026-07-29
  15. HEICO Corporation Q2 FY2026 Form 10-QSEC EDGAR · primary · published 2026-05-29 · accessed 2026-07-29
  16. TransDigm Group Fiscal 2026 Second Quarter ResultsSEC EDGAR · primary · published 2026-05-05 · accessed 2026-07-29