ATR ATR 72

1,122 parts applicable to this airframe — turboprop

Part Number	Description	Manufacturer	Airframe	ATA	Category	Status
1670	BULB	—	ATR 72	33	unknown
16S53671340200	FRAME	—	ATR 72	53	Structures	PMA
300480000006	AUTO FEATHER	—	ATR 72	61	unknown
3011001	LIGHT	—	ATR 42 ATR 72	33	Electromechanical	PMA
3011232	LIGHT	—	ATR 42 ATR 72	33	Electromechanical	PMA
301200	POWER SUPPLY	—	ATR 72	33	unknown
3012500	COVER	—	ATR 42-500 ATR 42+1	33	unknown
311237901	COMBUSTION LINER	—	ATR 72	72	unknown
40782	BATTERY	—	Bell 407 ATR 72	24	unknown
4122010003	PUMP	—	Bell 412 ATR 72	61	unknown
52113091111	LIGHT	—	ERJ-145 ATR 72	33	Electromechanical	PMA
7008123	LIGHT	—	ATR 42-500 ATR 42+1	33	Electromechanical	PMA
8SS00558800	TRANSFORMER	—	ATR 72	33	Electromechanical	PMA
8TD50N	DUCT	—	ATR 72	75	Consumables / Hardware	PMA
AL2024T3	FLOOR SUPPORT	Saab	ERJ-135 ERJ-145+3	53	Structures	OEM
CG7G010	SMOKE DETECTOR	—	ATR 72	26	Safety / Emergency	PMA
E01173110	SWITCH	—	ATR 42 ATR 72	33	Electromechanical	PMA
EPN5300013019	SEAT TRACK	—	ATR 72	53	Interior / Furnishings	PMA
NTA44770	FLOORBEAM	AEROSP	ATR 42 ATR 72	53	Structures	OEM
S242100260000	HOUSING	—	ATR 72	24	unknown
S2711201300500	CRANK LEVER	—	ATR 72	27	unknown
S2711212700140	BELLCRANK	—	ATR 72	27	unknown
S2918156104200	LINE	—	ATR 72	29	unknown
S3611012900000	DUCT	—	ATR 72	36	Environmental / Cabin	OEM
S52171031426	FRAME	—	ATR 72	53	Structures	PMA
S52176406202	SUPPORT	AEROSP	ATR 42 ATR 72	53	Structures	unknown
S52176406210	SUPPORT ANGLE	AEROSP	ATR 42 ATR 72	53	Structures
S52376105202	DOOR FRAME	AEROSP	ATR 42-300 ATR 42-500+2	52	Structures	OEM
S5317150120305	SKIN	—	767-300 ATR 42-300+2	53	Structures	PMA
S5317220121005	SKIN	—	767-300 ATR 72	53	Structures	PMA
S531722121405	SKIN	—	767-300 ATR 72	53	Structures	PMA
S53172222210	INTERCOSTAL	—	767-300 ATR 72	53	unknown
S533714202062	STRINGER	—	ATR 72	53	Structures	PMA
S5337241120002	FLOORBEAM	—	ATR 42-300 ATR 42-500+2	53	unknown
S5337500121002	SEAT TRACK	—	ATR 42-300 ATR 42+1	53	Interior / Furnishings	PMA
S5337500121402	SEAT TRACKS	AEROSP	ATR 42-300 ATR 42+1	53	Interior / Furnishings
S53572103244	STRINGER CLIP	AEROSP	ATR 42 ATR 72	53	Structures
S53671205200	SKIN PANEL	AEROSP	767-300 ATR 42-300+2	53	Structures	OEM
S536712890005	SKIN	—	767-300 ATR 72	53	Structures	PMA
S53671407228	STRINGER	—	767-300 ATR 72	53	Structures	PMA
S536724062802	FLOORBEAM	—	767-300 ATR 72	53	unknown
S536724075201	FLOORBEAM	—	767-300 ATR 72	53	unknown
S5367240821401	BRACKET	—	767-300 ATR 72	53	unknown
S53672408254	FLOORBEAM	AEROSP	767-300 ATR 72	53	Structures
S5367240921802	FLOORBEAM	AEROSP	767-300 ATR 42-300+3	53	Structures
S536780012226	SEAT TRACK	—	767-300 ATR 72	53	Interior / Furnishings	PMA
S53678001248	SEAT TRACK	—	767-300 ATR 72	53	Interior / Furnishings	PMA
S53973202206	STIFFENER	—	ATR 72	53	unknown
S5397330120001	SUPPORT	—	ATR 72	53	unknown
S7171200200200	DRAIN MAST	—	ATR 72	71	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.