ATR ATR 72

1,122 parts applicable to this airframe — turboprop

Part Number	Description	Manufacturer	Airframe	ATA	Category	Status
011260500	COOLING FAN	—	ATR 42-500 ATR 42+1	21	Environmental / Cabin	PMA
2757B01	CHECK VALVE	—	ATR 72	21	Hydraulics	PMA
516531152	FIRE CONTROLLER	—	ATR 72	26	Safety / Emergency	PMA
852516R12BOPNH	CONNECTOR	—	ATR 72	33	unknown
8E50055880	CIRCUIT BOARD	—	ATR 72	33	Electromechanical	PMA
AHA1653	BRAKE ASSY	Goodrich	ATR 42-300 ATR 42+1	32	Wheels & Brakes	OEM
AQS1000	BATTERY PACK	NEC	ATR 72	33	Electromechanical	OEM
BHC10001	VALVE BLOCK ASSY	—	ATR 72	27	Hydraulics	PMA
D232010000	HARNESS	—	ATR 72	32	Electromechanical	PMA
EO38321	FUSE	—	ATR 42-300 ATR 42+1	33	Electromechanical	PMA
O871BN33	ICE DETECTOR	—	ATR 72	30	Safety / Emergency	PMA
S3278110120000	BUMPER	—	ATR 72	32	Landing Gear	PMA
S52176301200	SKIN	AEROSP	ATR 42-300 ATR 42+1	52	Structures
S5237651922051	HINGE	—	ATR 72	52	Structures	PMA
S53375001202	SEAT TRACKS	AEROSP	ATR 42-300 ATR 42+1	53	Interior / Furnishings
S53375001206	SEAT TRACK	AEROSP	ATR 72	53	Interior / Furnishings	OEM
S53570203200	SEAT TRACKS	AEROSP	ATR 72	53	Interior / Furnishings	OEM
S53570203202	SEAT TRACKS	AEROSP	ATR 72	53	Interior / Furnishings	OEM
S53572505200	FLOOR BEAM	AEROSP	ATR 72	53	Structures	OEM
S5357410120001	KEEL BEAM	—	ATR 72	53	Structures	OEM
S53577400226	FITTING	—	ATR 72	53	unknown
S536712172001	WEB	—	767-300 ATR 72	53	Structures	PMA
S53671217210	CLOSEOUT PANEL	AEROSP	767-300 ATR 42-300+2	53	Interior / Furnishings
S5367121721001	PLATE	—	767-300 ATR 42-300+2	53	unknown
S5367121721101	PLATE	AEROSP	767-300 ATR 42-300+2	53	Structures	unknown
S5367121724202	STIFFENER	—	767-300 ATR 72	53	Structures	PMA
S5367121729801	DRAIN TRACK	AEROSP	767-300 ATR 42-300+2	53	Structures
S5367121733601	SUPPORT	—	767-300 ATR 72	53	unknown
S53671257221	STRINGER	AEROSP	767-300 ATR 42+1	53	Structures
S5367125722151	INTERCOSTAL	—	767-300 ATR 42-300+2	53	Structures	OEM
S53671310238	ANGLE	—	767-300 ATR 72	53	Structures	PMA
S5367240602061	FLOORBEAM	—	767-300 ATR 72	53	Structures	PMA
S53672406204	DOUBLER	—	767-300 ATR 72	53	Structures	PMA
S5367800121202	SEAT TRACK	AEROSP	767-300 ATR 42+1	53	Interior / Furnishings	OEM
S5367800122802	SEAT TRACK	AEROSP	767-300 ATR 72	53	Interior / Furnishings	OEM
S5367800812602	SUPPORT	—	767-300 ATR 72	53	unknown
S53678008216	FLOOR SUPPORT	AEROSP	767-300 ATR 42-300+2	53	Structures	OEM
S5367800826901	FLOOR SUPPORT	—	767-300 ATR 42-300+2	53	Structures	PMA
S53678009201	SUPPORT	—	767-300 ATR 42+1	53	unknown
S5367801244	SEAT TRACK	—	767-300 ATR 72	53	Interior / Furnishings	PMA
S5367801246	SEAT TRACK	—	767-300 ATR 72	53	Interior / Furnishings	PMA
S5368953400401	SUPPORT	—	767-300 ATR 72	53	unknown
S5376800124502	SEAT TRACK	—	767-300 ATR 72	53	Interior / Furnishings	PMA
S5397071258	ANGLE	—	ATR 72	26	Structures	PMA
S53970716268	ANGLE	—	ATR 72	53	Structures	PMA
S53970716408	ANGLE	—	ATR 72	53	Structures	PMA
S53970716409	ANGLE	—	ATR 72	53	Structures	PMA
S53975005202	ANGLE	—	ATR 72	53	Structures	PMA
S53975005203	ANGLE	—	ATR 72	53	Structures	PMA
VARIOUS	CONTROL QUADRANT	PWA	737-900 A319+9	53	Instruments	OEM

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.