ATR ATR 42

1,122 parts applicable to this airframe — turboprop

Part Number	Description	Manufacturer	Airframe	ATA	Category	Status
3011001	LIGHT	—	ATR 42 ATR 72	33	Electromechanical	PMA
353678008216B00	BEAM	—	ATR 42	53	unknown
552019A	INVERTER	—	ATR 42-300 ATR 42	24	Electromechanical	PMA
56785538012	INDICATOR	Thales	ATR 42-300 ATR 42	77	Instruments	OEM
687	WIRE	—	ATR 42-300 C402+1	24	Electromechanical	PMA
782490A51	PITCH CONTROL	—	ATR 42-300 ATR 42	61	unknown
7827311	SOLENOID VALVE	—	Dash 8-400 ATR 42-300+2	61	unknown
84501	MODULE	—	ATR 42-500 ATR 42	33	unknown
B40NA1500	FAN	—	ATR 42-300 ATR 42	26	unknown
D58806	SPACER	—	ATR 42	32	Consumables / Hardware
E420351	DEICE HORN	—	ATR 42-300 ATR 42	30	unknown
E420362	DEICE HORN	—	ATR 42-300 ATR 42	30	unknown
EVCTA325	FAN	—	ATR 42	21	unknown
OP1670	BULB	—	ATR 42-500 ATR 42	33	unknown
S2911002300100	BRACKET	—	ATR 42-300 ATR 42	27	unknown
S5287130401950	DOOR	—	ATR 42-300 ATR 42	52	Structures	PMA
S5317150120305	SKIN	—	767-300 ATR 42-300+2	53	Structures	PMA
S5317210121805	SKIN	—	767-300 ATR 42-300+1	53	Structures	PMA
S533713232005	SKIN	—	ATR 42-300 ATR 42	53	Structures	PMA
S5337240822801	FRAME	—	ATR 42-300 ATR 42	53	Structures	PMA
S5357140021500	STRINGER	—	ATR 42-500 ATR 42	53	Structures	PMA
S53671217980800	DRAIN TRACK	—	767-300 ATR 42-300+1	53	Interior / Furnishings	PMA
S5367140022802	STRINGER	—	767-300 ATR 42-300+1	53	Structures	PMA
S536724007202	FLOORBEAM	—	767-300 ATR 42-300+1	53	unknown
S53678001238	SEAT TRACK	—	767-300 ATR 42-300+1	53	Interior / Furnishings	PMA
S5367800123902	SEAT TRACK	—	767-300 ATR 42	53	Interior / Furnishings	PMA
S5367800125002	SEAT TRACK	AEROSP	767-300 ATR 42-300+2	53	Interior / Furnishings
S536780082201	CHORD	—	767-300 ATR 42-300+1	53	unknown
S536780092002	FLOOR SUPPORT	—	767-300 ATR 42-300+1	53	unknown
S53682015202	VENTURI	—	767-300 ATR 42-300+1	21	unknown
S53970916202	BRACKET	—	ATR 42	53	unknown
S53971309206	BRACKET	—	ATR 42-500 ATR 42	53	unknown
S5397131700200	LINK	—	ATR 42-300 ATR 42	32	unknown
S53971402203	STRUCTURE	AEROSP	ATR 42	53	Structures
S53971402214	SUPPORT	—	ATR 42	53	unknown
S53971424200	INTERCOSTAL	—	ATR 42	53	unknown
S5751004900200	CAM GUIDE	—	ATR 42-300 ATR 42	27	unknown
S5751012900200	CAM GUIDE	—	ATR 42-300 ATR 42	27	unknown
S5751012900300	CAM GUIDE	—	ATR 42-300 ATR 42	27	unknown
S5751013000200	CAM GUIDE	—	ATR 42-300 ATR 42	27	unknown
S5751013000300	CAM GUIDE	—	ATR 42-300 ATR 42	27	unknown
S5751013100200	CAM GUIDE	—	ATR 42-300 ATR 42	27	unknown
S5751013100300	CAM GUIDE	—	ATR 42-300 ATR 42	27	unknown
S5751013200200	CAM GUIDE	—	ATR 42-300 ATR 42	27	unknown
S5751013200300	CAM GUIDE	—	ATR 42-300 ATR 42	27	unknown
S5751014800300	CAM GUIDE	—	ATR 42-300 ATR 42	27	unknown
S5751014900200	CAM GUIDE	AEROSP	767-300 ATR 42-300+1	27	Structures	OEM
S5751014900300	CAM GUIDE	—	ATR 42-300 ATR 42	27	unknown
S5751015000200	CAM GUIDE	—	ATR 42-300 ATR 42	27	unknown
S5751015000300	CAM GUIDE	—	ATR 42-300 ATR 42	27	unknown

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.