ATR ATR 42-300

1,122 parts applicable to this airframe — turboprop

Part Number	Description	Manufacturer	Airframe	ATA	Category	Status
10300311	SENSOR	AUXILEC	A380 ATR 42-300+2	24	Electromechanical	PMA
1031309111	LIGHT	—	ATR 42-300 ATR 42+1	33	Electromechanical	PMA
1095A	COFFEEMAKER	—	ERJ-145 C340+3	25	Interior / Furnishings	OEM
35318930201	BRACKET	—	ATR 42-300 ATR 42	53	unknown
626932	SHAFT	—	ATR 42-300 ATR 42	27	unknown	OEM
C245890002	UPLOCK SWITCH	MESSIER	ATR 42-300 ATR 42+1	32	Electromechanical	OEM
CH6151	SOCKET	—	ATR 42-300 ATR 42	33	unknown
S353172143201	STRINGER	—	ATR 42-300 ATR 42	53	Structures	OEM
S35337140020602	STRINGER	—	ATR 42-300 ATR 42	53	Structures	OEM
S5217620620000	SUPPORT	—	ATR 42-300 ATR 42	53	unknown
S52176207218	INTERCOSTAL	—	ATR 42-300 ATR 42	53	Structures	PMA
S53171315204	DOOR FRAME	—	767-300 ATR 42-300+1	53	Structures	OEM
S5317220220251	FRAME	—	767-300 ATR 42-300+1	53	Structures	PMA
S5317220625801	FLOORBEAM	—	767-300 ATR 42-300+1	53	Structures	PMA
S53172210200	FLOORBEAM	AEROSP	767-300 ATR 42-300+2	53	Structures	OEM
S53173108200	FLOOR PANEL	—	767-300 ATR 42-300+1	53	Structures	OEM
S53173108201	FLOOR PANEL	—	767-300 ATR 42-300+1	53	Structures	PMA
S53189530200	BRACKET	—	767-300 ATR 42-300+1	53	unknown
S5337122620001	SILL	AEROSP	ATR 42-300 ATR 42	53	Structures	OEM
S53371321220	ANGLE	—	ATR 42-300 ATR 42	53	Structures	PMA
S53371420204	STRINGER	—	ATR 42-300 ATR 42	53	Structures	OEM
S53371420210	STRINGER	—	ATR 42-300 ATR 42	53	Structures	PMA
S53371420212	STRINGER	—	ATR 42-300 ATR 42	53	Structures	PMA
S5337220620051	FRAME	—	ATR 42-300 ATR 42	53	Structures	OEM
S5357140120900	FRAME	—	ATR 42-300 ATR 42	53	Structures	OEM
S5357210320551	CLIP	—	ATR 42-300 ATR 42	53	unknown	OEM
S5357231120401	CLIP	—	ATR 42-300 ATR 42	53	unknown	OEM
S5357231121451	FRAME	—	ATR 42-300 ATR 42	53	Structures	OEM
S5357410620402	PLATE	—	ATR 42-300 ATR 42	53	unknown
S53578100200	FITTING	—	ATR 42-300 ATR 42	32	unknown
S5367125727351	STRINGER	—	767-300 ATR 42-300+1	53	Structures	OEM
S5367130021800	STRINGER	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367138920800	STRINGER	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367140020202	STRINGER	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367140723400	STRINGER	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367240420601	FLOORBEAM	—	767-300 ATR 42-300+2	53	Structures	PMA
S5367240422251	FRAME	—	767-300 ATR 42-300+1	53	Structures	OEM
S5367240522851	FRAME	—	767-300 ATR 42-300+1	53	Structures	PMA
S536724060001	FRAME	—	767-300 ATR 42-300+1	53	Structures	OEM
S5367240701661	FLOORBEAM	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367240800461	FLOORBEAM	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367300020302	STRINGER	—	767-300 ATR 42-300+1	52	Structures	PMA
S536780012001	SEAT TRACK	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367800822201	FLOOR SUPPORT	—	767-300 ATR 42-300+1	53	Structures	OEM
S53871102200	FRAME	AEROSP	ATR 42-300 ATR 42-500+1	53	Structures	OEM
S538715022051	FRAME	—	ATR 42-300 ATR 42	53	Structures	OEM
S5387240120005	SKIN	—	ATR 42-300 ATR 42	53	Structures	PMA
S54110010XXXXG	MOUNT	—	ATR 42-300 ATR 42	71	unknown
S54110200012001	MOUNT	—	ATR 42-300 ATR 42	71	unknown
SVL600000401	MOUNT	—	ATR 42-300 ATR 42	53	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.