The component layer · parts · FAA feed as of October 12, 2026

Parts

Two public FAA records meet here. The failure reports that airlines and repair shops file say which part failed, on what aircraft, and how (worn, cracked, leaking); the words they use are brought to one plain name, so "BRAKE ASSY", "Brake Assembly" and "brake" are one part. The parts manufacturer approvals say which companies may make a replacement part of that name for which models. 1,227,278 approvals held by 3,185 companies, 1,227,228 of them current. Click a part for its page; a part makers list is beside it.

Approved replacement parts by system 1,227,278 approvals

Approved parts by system, as a table

	approvals
Other and general	843,094
Cabin, seats and restraints	184,224
Airframe structure	55,196
Engine	44,658
Electrical power	40,411
Instruments and avionics	14,631
Flight controls	13,152
Landing gear	10,784
Heating, ice protection and utility systems	7,627
Emergency equipment	5,492
Propeller	2,667
Fuel system	2,663
Rotorcraft systems	2,061
Electric propulsion	618

Approvals granted by year

Approvals by year, as a table

	approvals
1990	1,112
1991	4,260
1992	11,202
1993	8,753
1994	8,945
1995	11,371
1996	10,536
1997	18,003
1998	20,081
1999	18,991
2000	21,483
2001	30,752
2002	14,589
2003	37,407
2004	24,859
2005	76,711
2006	48,067
2007	36,034
2008	37,630
2009	57,789
2010	48,738
2011	63,745
2012	74,881
2013	64,140
2014	45,366
2015	100,038
2016	50,349
2017	24,220
2018	36,125
2019	36,555
2020	23,146
2021	28,183
2022	27,634
2023	19,441
2024	14,062
2025	54,071
2026	11,539

Models with the most approved replacement parts

Boeing 737 170,491 Boeing 777 150,018 Boeing 747 139,984 Boeing 767 94,577 Boeing 757 79,216 Airbus A330 57,903 Airbus A320 36,556 Airbus A340 34,582 Airbus A321 31,770 Boeing 727 30,081 Boeing 787 Dreamliner 29,394 Airbus A319 27,080 Airbus A300 24,786 Bombardier CL-600 Challenger and CRJ 21,226 Mcdonnell Douglas DC-9 15,421

Part	Mostly in	Reports, 10 years	Reports since 1995	Approved replacements	Makers
Proximity Sensor	Airframe structure	1,106	2,581	114	11
Vapor Barrier	Airframe structure	1,102	1,253	2	2
Fan	Heating, ice protection and utility systems	1,090	3,110	355	50
Trunnion	Airframe structure	1,078	2,011	89	25
Relay	Electrical power	1,074	3,772	413	50
Pan	Airframe structure	1,065	3,477	97	30
Bushing	Airframe structure	1,059	3,390	10,293	306
Filter	Heating, ice protection and utility systems	1,055	2,407	1,233	125
Attach Fitting	Airframe structure	1,050	3,930	174	19
Hinge Bracket	Airframe structure	1,033	2,052	15	10
Pressure Deck	Airframe structure	1,031	1,390
Control Valve	Heating, ice protection and utility systems	1,019	2,465	146	29
Flap	Airframe structure	1,002	3,772	695	37
Stringer Splice	Airframe structure	981	2,235	3	2
Oven	Cabin, seats and restraints	973	1,949	272	12
Control Panel	Flight controls	968	2,527	266	35
Threshold	Airframe structure	966	2,115	78	17
Strip	Airframe structure	958	1,635	669	52
Fuse	Electrical power	934	2,619	57	21
Splice	Airframe structure	929	3,479	220	42
Track	Airframe structure	924	1,948	301	54
Brake	Landing gear	915	2,944	83	18
Housing	Electrical power	914	2,532	1,204	168
Computer	Flight controls	910	4,138	150	18
Shear Panel	Airframe structure	899	902	2	1
Mount	Airframe structure	891	3,330	351	97
Oil System	Engine	887	2,023	1	1
Crease Beam	Airframe structure	879	3,582	29	2
Elec Connector	Electrical power	855	874
Roller	Airframe structure	843	1,636	1,010	114
Module	Heating, ice protection and utility systems	840	2,504	4,751	72
Drag Angle	Airframe structure	839	1,666	2	1
Line	Heating, ice protection and utility systems	828	5,414	59	15
Transmitter	Flight controls	827	2,875	214	31
Stop Fitting	Airframe structure	823	1,748	128	10
Epsu	Electrical power	814	1,287	1	1
Shutoff Valve	Heating, ice protection and utility systems	812	2,021	268	21
Acm	Heating, ice protection and utility systems	806	2,449	6	3
Support Fitting	Airframe structure	802	2,323	180	17
Blade	Engine	792	4,661	369	44
Ring	Engine	792	3,018	4,554	253
Circuit Breaker	Electrical power	776	2,394	640	46
Cap	Airframe structure	774	2,069	1,802	146
Tire	Landing gear	766	2,725	4	3
Sidewall Support	Airframe structure	743	743
Fastener	Airframe structure	728	1,640	85	22
Duct	Heating, ice protection and utility systems	705	3,254	3,565	105
Vane	Airframe structure	703	2,312	185	34
Cable	Airframe structure	688	3,100	37,320	232
Spring	Airframe structure	685	2,015	2,533	213
Transceiver	Instruments and avionics	684	2,404	15	4
Nut Plate	Airframe structure	681	1,041	48	17
Strut	Landing gear	679	2,557	348	60
Display	Instruments and avionics	667	1,785	162	17
Idg	Electrical power	653	1,906	31	2
Flap System	Flight controls	642	1,646	2	1
Landing Gear	Landing gear	633	2,037	326	68
Anti Ice	Heating, ice protection and utility systems	628	1,245	87	19
Door Latch	Airframe structure	619	680	25	6
Lever	Airframe structure	609	1,401	321	79
Probe	Fuel system	603	1,303	273	39
Attach Bracket	Airframe structure	602	1,380	42	14
Lug	Airframe structure	601	1,065	85	29
Nut	Airframe structure	600	1,920	5,491	186
Cleat	Airframe structure	568	850	95	8
Pressure Panel	Airframe structure	567	2,125
Shear Web	Airframe structure	562	1,380	26	9
Proximity Switch	Airframe structure	560	1,686	71	14
Motor	Flight controls	558	1,779	303	56
Fire Loop	Emergency equipment	549	2,089
Tee Fitting	Airframe structure	541	1,196	17	8
Lanyard	Cabin, seats and restraints	537	1,346	281	44
Tube	Cabin, seats and restraints	524	2,342	7,268	222
Screw	Airframe structure	518	1,242	1,377	137
Hydraulic Line	Heating, ice protection and utility systems	515	1,645	10	3
Bleed Valve	Engine	510	1,452	68	24
Accumulator	Airframe structure	503	805	169	21
Glowstrip	Cabin, seats and restraints	495	1,337
Spar Cap	Airframe structure	492	1,664	1	1
Eec	Engine	491	1,093	1	1
Lock	Airframe structure	478	740	347	69
Clamp	Heating, ice protection and utility systems	476	1,939	5,105	159
Outflow Valve	Heating, ice protection and utility systems	476	1,277	107	9
Coffeemaker	Cabin, seats and restraints	458	1,165	1	1
Hose	Heating, ice protection and utility systems	456	2,154	6,258	123
Generator	Electrical power	453	1,926	149	26
Satcom	Instruments and avionics	452	1,071	9	4
Sliding Window	Airframe structure	449	637	38	8
Slat	Airframe structure	440	1,457	553	7
Striker	Airframe structure	435	748	100	25
Reservoir	Cabin, seats and restraints	433	967	179	30
Fire Detector	Emergency equipment	432	1,240	42	9
Wedge	Airframe structure	428	1,837	177	23
Profile	Airframe structure	425	1,040	8	4
Adapter	Airframe structure	409	996	1,214	181
Post	Airframe structure	407	1,364	30	13
Modulating Valve	Heating, ice protection and utility systems	391	483	14	3
Fuel Cap	Fuel system	389	519	71	21
Starter	Engine	388	1,570	788	27
Hook	Cabin, seats and restraints	387	921	236	43

Sources: the FAA's service difficulty reports (1995 to date; the part name as the reporter wrote it, reduced to its first plain words) and the FAA's parts manufacturer approvals from the Dynamic Regulatory System. A report counts a part that failed and was fixed; it does not say how many of that part are flying, so a common part on a big fleet is reported more. "Unknown" and blank names are left out.