ATR ATR 42

1,122 parts applicable to this airframe — turboprop

Part Number	Description	Manufacturer	Airframe	ATA	Category	Status
10718DAF	FUEL HEATER	—	ATR 42 ATR 72	73	Fuel Systems	PMA
11S53173206003	FLOOR	—	ATR 42-300 ATR 42	53	Structures	PMA
243230	GENERATOR	—	ATR 42-500 ATR 42+1	24	Electromechanical	PMA
3011157	BATTERY PACK	—	ATR 42-300 ATR 42	33	Environmental / Cabin	PMA
3047600	ENGINE	—	ATR 42-500 ATR 42	72	Engine Accessories	PMA
3351117CF20	WIRE	—	ATR 42	33	Electromechanical	PMA
800326	COVER	Thales	ATR 42-300 ATR 42	24	Avionics / Electronics	unknown
8ESOC5588	POWER UNIT	—	ATR 42-300 ATR 42	33	Electromechanical	OEM
AHA1653	BRAKE ASSY	Goodrich	ATR 42-300 ATR 42+1	32	Wheels & Brakes	OEM
E038321	FUSE	—	ATR 42-300 ATR 42	33	Electromechanical	PMA
EO38321	FUSE	—	ATR 42-300 ATR 42+1	33	Electromechanical	PMA
EVTA1926DA	FAN	—	ATR 42-300 ATR 42	21	Environmental / Cabin	PMA
EVTA1926DC	FAN	—	ATR 42-300 ATR 42	21	Environmental / Cabin	PMA
FE1595007	PROP BRAKE	—	ATR 42-300 ATR 42	61	Wheels & Brakes	PMA
L610549	WHEEL BEARING	TIMKEN	DC-9-50 MD-81+6	32	Wheels & Brakes	OEM
NP1588014	WINDSHIELD	PPG	C414 ATR 42+1	56	Structures	OEM
S2541003900000	THRESHOLD	—	ATR 42-300 ATR 42	53	Structures	PMA
S4003VB31	HARNESS	—	ATR 42-300 ATR 42	61	Electromechanical	PMA
S52376201202	SKIN	AEROSP	ATR 42-300 ATR 42	52	Structures
S5317215820401	FLOORBEAM	—	767-300 ATR 42-300+1	53	Structures	PMA
S5337129320201	ATTACH FITTING	AEROSP	ATR 42-300 ATR 42+1	53	Structures
S5337131101260	SKIN	—	ATR 42-300 ATR 42	53	Structures	PMA
S53372305222	FRAME	—	ATR 42-300 ATR 42	53	Structures	PMA
S53572103200	STRINGER CLIP	AEROSP	ATR 42-300 ATR 42+1	53	Structures
S53572804200	FITTING	—	ATR 42-300 ATR 42	53	unknown
S5367020120402	SEAT TRACK	—	767-300 ATR 42-300+1	53	Interior / Furnishings	PMA
S5367120500060	SKIN	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367125722151	INTERCOSTAL	—	767-300 ATR 42-300+2	53	Structures	OEM
S53671310200	FRAME	—	767-300 ATR 42-300+1	53	Structures	PMA
S536713112005	FRAME	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367131829201	WEB	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367140030002	STRINGER	—	767-300 ATR 42-300+1	53	Structures	PMA
S53672400214	ANGLE	—	767-300 ATR 42-300+1	53	Structures	PMA
S53672404206	FLOORBEAM	—	767-300 ATR 42-300+1	53	Structures	unknown
S5367240601261	FLOORBEAM	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367240901061	FLOORBEAM	—	767-300 ATR 42-300+1	53	Structures	PMA
S53672409220	SUPPORT	—	767-300 ATR 42-300+1	53	unknown
S5367800121202	SEAT TRACK	AEROSP	767-300 ATR 42+1	53	Interior / Furnishings	OEM
S53678001232	SEAT TRACK	AEROSP	767-300 ATR 42-300+2	53	Interior / Furnishings
S5367800820002	FLOOR SUPPORT	—	767-300 ATR 42-300+2	53	Structures	PMA
S5367800821002	ZEE MEMBER	—	767-300 ATR 42-300+1	53	Structures	PMA
S53678008216	FLOOR SUPPORT	AEROSP	767-300 ATR 42-300+2	53	Structures	OEM
S53678009201	SUPPORT	—	767-300 ATR 42+1	53	unknown
S53689516202	SUPPORT	—	767-300 ATR 42-300+1	53	unknown
S5376131024251	FRAME	—	767-300 ATR 42-300+1	53	Structures	PMA
S5391007501200	PANEL	—	ATR 42-300 ATR 42	57	unknown
S53970916276	BRACKET	—	ATR 42	53	unknown
S5397091636301	SUPPORT	—	ATR 42	53	unknown
S5721058020051	SPAR	—	ATR 42-300 ATR 42	57	Structures	unknown
S9251155500100	LIGHT	—	ATR 42-300 ATR 42	33	Electromechanical	PMA

Utilization & cargo trend(US carriers, 2015–2025)

ATR family rollup — BTS T-100, domestic + international

Cycles per aircraft

2422025

20152025

2020: 278

Recovered to 176% of 2019 (2024 vs 2019)

Freighter share of departures

24%→44%2015 → 2025

20152025

Est. US-registered fleet

642025

20152025

US carriers only (BTS T-100, domestic + international segments) — foreign-carrier flying is excluded, so global utilization runs higher. Fleet size is reconstructed from the FAA registry (built on or before each year, not yet deregistered) — an approximation. Freighter share counts departures with zero passengers and freight aboard — a proxy for freighter/combi operations, not a tail-by-tail conversion count. Missing years render as gaps.

USM supply — retirements & teardowns(2023–2026)

ATR family — FAA registry deregistrations

Left the US registry

34aircraft

Stayed domestic

10vs 24 exported

Avg age at retirement

18.7years

Still US-registered

64aircraft

Where this family's parts catalog concentrates — the systems most exposed to incoming teardown supply

43.3%(1,673)

10.8%(417)

7.1%(276)

5.8%(224)

ATA 32 — Landing Gear

5.7%(220)

FAA registry data. Domestic deregistration is a teardown proxy — it also captures re-registrations and some unflagged exports, so it is not a confirmed part-out count; exported aircraft left the US fleet intact and are not USM supply. ATA shares reflect where this directory's parts for the family concentrate (parts in parentheses) — a coverage signal, not the aircraft's bill of materials or a teardown-yield forecast.

Engine-program supply pressure(since 2023)

FAA registry — US-registered fleet

Engines account for roughly half of all MRO spend, so engine programs shedding aircraft are where retirement supply carries the most value.

Engine model	Active tails	Engine units	Retired since ’23	Exported	Avg age at dereg
P&W CANADA PW120	17	34	4	3	31.8 yr
P&W CANADA PW121	14	28	4	6	33 yr
P&W CANADA PW127M	19	38	1	6	12.9 yr
P&W CANADA PW127E	1	2	1	1	19 yr
P & W 127	3	6	0	0	—
P&W CANADA PW124	2	4	0	0	—
P&W CANADA PW127F	2	4	0	2	18.5 yr

FAA registry data, US-registered aircraft only. Counts reflect the engine model as registered — generic “series” rows coexist with thrust-variant rows, so per-variant figures are partial. Retired = domestic deregistrations (a teardown proxy, not a confirmed part-out); exported aircraft left the US fleet intact. Active tails span every family the engine flies on, not just this one.

Maintenance economics(US carriers, through 2025)

ATR family — BTS Form 41 filings

Direct maintenance per block hour

$178fleet avg

Airframe / engine split

$171/$7

Reporting carriers

BTS Form 41 data (Schedule P-5.2 maintenance expense over T-2 block hours), Group III US carriers only — filers above $1B annual revenue; smaller US operators, Part 135, and all non-US carriers are not in this data. Dollars are accrual-basis from regulatory filings (reserves and depreciation included), so they benchmark fleet economics and do not track to individual repair events. Averages are block-hour- weighted across every reporting carrier; the range spans per-carrier rates after excluding marginal reporting slices, and small carrier counts are noisy.

Airworthiness Directive activity

FAA / EASA public regulatory data

52airworthiness directives affecting this fleet — recurring compliance demand for the parts and shops that serve it

Most recent

EASA AD 2025-0103effective May 19, 2025Mixed actions
EASA Safety Publications Tool
EASA AD 2025-0087effective Apr 30, 2025Mixed actions
EASA Safety Publications Tool
EASA AD 2025-0080effective Apr 25, 2025Mixed actions
EASA Safety Publications Tool
EASA AD 2025-0045effective Mar 5, 2025Mixed actions
EASA Safety Publications Tool
EASA AD 2025-0044effective Mar 5, 2025Mixed actions
EASA Safety Publications Tool

Directives linked to this airframe family in the FAA / EASA regulatory corpus we have processed — not a complete historical AD list. An AD is a compliance requirement that drives scheduled work (inspections, replacements, modifications) across the fleet; inspection directives are not replacement directives, and none of this is a prediction that any part will fail.