ATR ATR 42-300

1,122 parts applicable to this airframe — turboprop

Part Number	Description	Manufacturer	Airframe	ATA	Category	Status
01-149	Module Pressure and Case Drain	Kennco-Magnaghi Logistics Corp	ATR 42-300 ATR 42-500	29	Hydraulics	PMA
01-149R9	Module Pressure and Case Drain	Kennco-Magnaghi Logistics Corp	ATR 42-300 ATR 42-500	29	Mechanical / Actuation	PMA
01-199R3	Reservoir Hydraulic	Kennco-Magnaghi Logistics Corp	ATR 42-300 ATR 42-500	29	Mechanical / Actuation	PMA
3037885	EXITER BOX	—	ATR 42-300 ATR 42	74	unknown
39-685-3	Anti Skid Manifold	Hydro-Aire Incorporated	ATR 42-300 ATR 42-500	32	Wheels & Brakes	PMA
39-685-4	Anti Skid Manifold	Hydro-Aire Incorporated	ATR 42-300 ATR 42-500	32	Wheels & Brakes	PMA
54-059R6	Accumulator Parking	Kennco-Magnaghi Logistics Corp	ATR 42-300 ATR 42-500	29	Mechanical / Actuation	PMA
54-059R7	Accumulator Parking	Kennco-Magnaghi Logistics Corp	ATR 42-300 ATR 42-500	32	Hydraulics	PMA
54-079R5	Accumulator Line	Kennco-Magnaghi Logistics Corp	ATR 42-300	29	Mechanical / Actuation	PMA
54-079R7	Accumulator Line	Kennco-Magnaghi Logistics Corp	ATR 42-300 ATR 42-500	29	Hydraulics	PMA
6226523201	ATC CONTROLLER	—	ATR 42-300 ATR 42	34	unknown
62BK100	Seat Cushion	Franklin Products Inc.	ATR 42-300	25	Interior / Furnishings	PMA
62BM100	Seat Cushion	Franklin Products Inc.	ATR 42-300	25	Interior / Furnishings	PMA
64-139	Valve Crossfeed	Kennco-Magnaghi Logistics Corp	ATR 42-300 ATR 42-500	28	Engine / Fuel	PMA
64-239	Valve Crossfeed	Kennco-Magnaghi Logistics Corp	ATR 42-300 ATR 42-500	28	Fuel Systems	PMA
AD-VP430KH3	Battery Cell	Aero Design Inc	CRJ-200 C208 Caravan+3	24	Electromechanical	PMA
CBC16707	RECEPTACLE	—	ERJ-135 ERJ-145+2	25	unknown
E0052R10B65NE	CONNECTOR	—	ATR 42-300 ATR 42	33	unknown
EO326	SWITCH	—	ATR 42-300 ATR 42	52	Electromechanical	PMA
EVAC2423FO	FAN	—	ATR 42-300 ATR 42	21	unknown
S5237610420751	FRAME	—	ATR 42-300 ATR 42	52	Structures	PMA
S52376110214	DOOR FRAME	AEROSP	ATR 42-300 ATR 42+1	52	Structures	OEM
S5307020421601	STRINGER	—	ATR 42-300 ATR 42	53	Structures	PMA
S5317071320900	INTERCOSTAL	—	767-300 ATR 42-300+1	53	unknown
S5317210122005	SKIN	—	767-300 ATR 42-300+1	53	Structures	PMA
S53172206258	FLOORBEAM	AEROSP	767-300 ATR 42-300+2	53	Structures	OEM
S5317221920601	FRAME	—	767-300 ATR 42-300+1	53	Structures	PMA
S53174000200	PRESSURE BLKHD	AEROSP	767-300 ATR 42-300+3	53	Structures
S5337120221002	STRINGER	—	ATR 42-300 ATR 42	53	Structures	PMA
S5337120320405	SKIN	—	ATR 42-300 ATR 42	53	Structures	PMA
S5337241123402	FLOORBEAM	—	ATR 42-300 ATR 42+1	53	unknown
S53572500200	FRAME	AEROSP	ATR 42-300 ATR 42	53	Structures	OEM
S53574300200	STRINGER	AEROSP	ATR 42-300 ATR 42	53	Structures
S536712050051	SKIN	—	767-300 ATR 42-300+1	53	Structures	PMA
S5367140723100	STRINGER	—	767-300 ATR 42-300+1	53	Structures	PMA
S53672408200	FRAME	AEROSP	767-300 ATR 42-300+2	53	Structures	OEM
S53678008216300	CHANNEL	—	767-300 ATR 42-300+1	53	unknown
S53914072102	INTERCOSTAL	—	ATR 42-300 ATR 42	53	unknown
S5397140226051	FRAME	—	ATR 42-300 ATR 42	53	Structures	PMA
S5397140226151	FRAME	—	ATR 42-300 ATR 42	53	Structures	PMA
S53971403201051	FRAME	—	ATR 42-300 ATR 42	53	Structures	PMA
S5397450221402	INTERCOSTAL	—	ATR 42-300 ATR 42	53	unknown
S5397450221502	INTERCOSTAL	—	ATR 42-300 ATR 42	53	unknown
S5411060301551	CONNECTOR	—	ATR 42-300 ATR 42	26	unknown
S5421020000000	MOUNT	—	ATR 42-300 ATR 42	54	unknown
SM400D41	CONTACTOR	CUTLERHAM	ATR 42-300 ATR 42+1	33	Electromechanical	OEM
TA71000415	L Band Antenna Gasket	TA Manufacturing	737-300 737-400+42	25	Interior / Furnishings	PMA
TA71000417	TCAS Antenna Gasket	TA Manufacturing	737-300 737-400+42	20	Consumables / Hardware	PMA
TA71000423	Radio Altimeter Antenna Gasket	TA Manufacturing	757-200 757-300+8	34	Avionics / Electronics	PMA
TA71000573	L Band Antenna Gasket	TA Manufacturing	737-300 737-400+34	20	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.