ATR ATR 42

1,122 parts applicable to this airframe — turboprop

Part Number	Description	Manufacturer	Airframe	ATA	Category	Status
16706	CONNECTOR	—	ERJ-145 ATR 42-300+1	33	unknown
301160	LIGHT	—	ATR 42-300 ATR 42+1	33	Electromechanical	PMA
55391009320200	BRACKETS	—	ATR 42-300 ATR 42	54	Interior / Furnishings	PMA
5542102100000	BRACKETS	—	ATR 42-300 ATR 42	54	Interior / Furnishings	PMA
72A2102	SWITCH	—	ATR 42-500 ATR 42	32	Electromechanical	PMA
8ES00558800	READING LIGHT	—	ATR 42-300 ATR 42+1	33	Electromechanical	PMA
ER824D060406	FITTING	—	ATR 42-300 ATR 42	29	unknown
M1585353	ANTENNA DRIVE	—	ATR 42-300 ATR 42	34	Avionics / Electronics	PMA
QA03996	FILTER	—	ATR 42-300 ATR 42	29	unknown
S5217643120000	ANGLE	—	ATR 42	52	Structures	PMA
S52376201206	PAN SECTION	—	ATR 42	52	Structures	OEM
S5307022320101	STRINGER	—	ATR 42-300 ATR 42	53	Structures	PMA
S5317220120805	SKIN	—	767-300 ATR 42-300+2	53	Structures	PMA
S5337142020402	STRINGER	—	ATR 42-300 ATR 42	53	Structures	PMA
S5337241120802	FLOORBEAM	—	ATR 42-300 ATR 42	53	Structures	PMA
S5357160020302	STRINGER	—	ATR 42-300 ATR 42	53	Structures	PMA
S53572200206	FRAME	AEROSP	ATR 42-300 ATR 42+1	53	Structures
S5357250000861	FRAME	—	ATR 42-300 ATR 42	53	Structures	PMA
S535725010026	STRINGER	—	ATR 42-300 ATR 42	53	Structures	PMA
S53671000202	STRINGER	—	767-300 ATR 42-300+1	53	Structures	PMA
S536712172402	SILL	—	767-300 ATR 42-300+1	53	Structures	PMA
S53671218200	TORQUE BOX	—	767-300 ATR 42-300+1	52	Structures	PMA
S5367131123051	FRAME	AEROSP	767-300 ATR 42-300+1	53	Structures
S5367131802063	ZEE MEMBER	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367131821002	STRINGER	—	767-300 ATR 42-300+1	53	Structures	PMA
S53671407208	STRINGER	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367140722200	STRINGER	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367140722902	STRINGER	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367240400060	FRAME	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367240601262	FLOOR BEAM	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367240620051	FRAME	—	767-300 ATR 42-300+1	53	Structures	PMA
S53672406202	FRAME	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367240820051	FRAME	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367240921801	FLOOR BEAM	—	767-300 ATR 42-300+2	53	Structures	OEM
S53672410252	WEB	—	767-300 ATR 42-300+1	53	Structures	PMA
S5368201500200	VENTURI TUBE	—	767-300 ATR 42-300+1	25	Consumables / Hardware	PMA
S53970201200	SEAT TRACK	—	ATR 42-300 ATR 42	53	Interior / Furnishings	PMA
S53970201202	SEAT TRACK	—	ATR 42-300 ATR 42	53	Interior / Furnishings	PMA
S53971402202	SUPPORT	AEROSP	ATR 42-300 ATR 42	53	Structures	unknown
S5397140220301	STIFFENER	—	ATR 42-300 ATR 42	53	Structures	OEM
S54210020001000	MOUNT	—	ATR 42-300 ATR 42	71	unknown
S542102000000	MOUNT	—	ATR 42-300 ATR 42	71	unknown
S54210200011001	MOUNT	—	ATR 42-300 ATR 42	71	unknown
S5421021000000	BRACKET	—	ATR 42-300 ATR 42	53	unknown
S5721158000660	RIB	—	ATR 42	57	Structures	OEM
S717001300500	DRAIN LINE	—	ATR 42	71	Fuel Systems	PMA
S7171001401300	DRAIN LINE	AEROSP	ATR 42-300 ATR 42	71	Consumables / Hardware	OEM
S7171001401500	DRAIN LINE	—	ATR 42-300 ATR 42	71	Fuel Systems	PMA
S7171004101300	DRAIN LINE	—	ATR 42	71	Fuel Systems	PMA
TMS6018953	STRINGER	—	ATR 42	53	Structures	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.