ATR ATR 42

1,122 parts applicable to this airframe — turboprop

Part Number	Description	Manufacturer	Airframe	ATA	Category	Status
08125	BEARINGS	—	C172 Skyhawk C182 Skylane+3	32	unknown
1155691	COVER	EMB	737-300 Dash 8-400+5	33	Structures	unknown
3100040	COMPENSATOR	—	ATR 42-300 ATR 42	32	unknown
481141029	OIL COOLER	PWC	ATR 42-300 ATR 42	79	Engine Accessories	OEM
7003975602	CONTROLLER	—	ATR 42	22	unknown
72A2102C	PROX SWITCH	—	ATR 42-500 ATR 42	32	Electromechanical	PMA
78249051	PROP CONTL UNIT	—	ATR 42-300 ATR 42+1	61	Engine Accessories	PMA
842801	SWITCH	—	ATR 42-300 ATR 42	52	Electromechanical	PMA
9442305	MOUNT BRACKET	BARRYCTRLS	ATR 42-300 ATR 42	71	Structures	OEM
CAU2583AB03	CONTL AUDIO UNIT	—	ATR 42-300 ATR 42-500+1	23	Avionics / Electronics	PMA
D226860408	ACTUATOR	—	ATR 42-300 ATR 42	32	Flight Controls	PMA
D22898500	ACTUATOR	—	ATR 42-500 ATR 42	32	Flight Controls	PMA
D57295	AXLE	—	ATR 42-300 ATR 42	32	Landing Gear	PMA
DHC62940699	DOUBLER	—	ATR 42-300 ATR 42	53	Structures	PMA
DMNI5022	ANTENNA	—	ATR 42	34	Avionics / Electronics	PMA
E0325A01	SWITCH	—	ATR 42-300 ATR 42	52	Electromechanical	PMA
EO242A28A0	RELAY	—	A320 A320-200+1	32	Electromechanical	PMA
GE4594	BULB	—	PA-32 Saratoga ATR 42-300+1	33	Consumables / Hardware	PMA
LP1670	LIGHT	—	ATR 42-300 ATR 42-500+2	33	Electromechanical	PMA
R20842C	ROD ASSY	—	ATR 42-300 ATR 42	32	unknown
S52176404206	SIDE PANEL	—	ATR 42-300 ATR 42	52	Interior / Furnishings	PMA
S52376306200	SKIN	—	ATR 42	52	Structures	PMA
S5247764300200	SHOOT BOLT	AEROSP	ATR 42 ATR 72	52	Structures
S5247765600400	SHOOT BOLT	—	ATR 42 ATR 72	52	Consumables / Hardware	PMA
S53070210208	STRINGER	—	ATR 42-500 ATR 42	53	Structures	OEM
S53572103210	FRAME	—	ATR 42-300 ATR 42	53	Structures	PMA
S5357270120600	ATTACH FITTING	—	ATR 42-300 ATR 42	32	Structures	PMA
S5357840000251	ATTACH FITTING	—	ATR 42-300 ATR 42	32	Structures	PMA
S535784000051	ATTACH FITTING	—	ATR 42-300 ATR 42	32	Structures	PMA
S535784000151	FITTING	—	ATR 42-300 ATR 42	32	unknown
S53671000200	STRINGER	—	767-300 ATR 42-300+2	53	Structures	PMA
S53671200216	STRINGER	—	767-300 ATR 42	53	Structures	PMA
S5367127300400	FITTING	AEROSP	767-300 ATR 42+1	52	unknown	unknown
S5367127300500	FITTING	AEROSP	767-300 ATR 42-300+2	52	unknown	unknown
S53671310242	FRAME	—	767-300 ATR 42-300+1	53	Structures	PMA
S53671400240	STRINGER	AEROSP	767-300 ATR 42-300+1	53	Structures	OEM
S5367240600860	FRAME	—	767-300 ATR 42-300+1	53	Structures	PMA
S53672409216	CLIP	—	767-300 ATR 42	53	Consumables / Hardware
S53672409225	REINFORCEMENT	AEROSP	767-300 ATR 42-300+1	53	Structures	OEM
S53672410200	FLOORBEAM	—	767-300 ATR 42-300+1	53	Structures	OEM
S53673001240	SEAT TRACK	—	767-300 ATR 42	53	Interior / Furnishings	OEM
S53678001240	SEAT TRACK	—	767-300 ATR 42-300+1	53	Interior / Furnishings	PMA
S536780012400	SEAT TRACK	—	767-300 ATR 42	53	Interior / Furnishings	PMA
S536780082102	ANGLE	—	767-300 ATR 42-300+1	53	Structures	PMA
S53681407210218	SPLICE	—	767-300 ATR 42-300+1	53	Structures	PMA
S53689592234	FRAME	—	767-300 ATR 42	53	Structures	PMA
S5387140921401	BLKHD STIFFENER	AEROSP	ATR 42-300 ATR 42	53	Structures	OEM
S57211577200	RIB	—	ATR 42	57	Structures	PMA
S57510650000240	FITTING	—	ATR 42	57	unknown
YCRS16CP	CAM FOLLOWER	—	DC-10-30 MD-11+2	27	Consumables / Hardware	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.