The component layer · parts · FAA feed as of October 13, 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	Reports since 1995	Approved replacements	Makers
Driveshaft	36	3	2
Fire Light	36
Pilot Tube	36	3	3
Rate Gyro	36
Seals	36	4	3
Subfloor	36
Turbine Blade	36	5	3
End Cap	35	446	41
Epr Transmitter	35
Expansion Link	35
Unsafe Light	35
Actuator Rotary	34	55	11
Coalescer Bags	34
Freq Adapter	34
Gen Contl	34
Smoke Det	34
Trim Actuator	34	42	12
Angles	33	6	2
Blkhd Fitting	33
Controls	33	10	3
Deck	33	8	5
Hyd Hose	33
Pwr Supply	33
Bushings	32	17	9
Eel Pwr	32
Foreflap	32
Main Bearing	32	4	1
Smoke Light	32
Trim	32	304	37
Ahrs Computer	31
Bearing Cage	31
Egt Indicator	31	18	2
Epr Indicator	31	39	5
Exit Sign	31	709	20
Fin	30	11	5
Floor Pan	30	115	4
Fuel Flow	30	112	12
Panels	30	6	5
Fuel Contrl	29
Gear Light	29
Light Socket	29	3	1
Relay Box	29	7	6
Rings	29	2	2
Tee Cap	29
Trim Compensator	29
Bell Frame	28
Bulkhead Cap	28
Door Light	28	1	1
Fuel Heat	28
Hyd Syst	28
Latch Mechanism	28	3	2
Pt Line	28
Blkhd Skin	27
Bulkhead Clip	27	5	2
Drive Motor	27	6	4
Fan Blades	27
Flexure	27	27	2
Projector	27	35	6
Trunnion Fitting	27
Video Monitor	27	70	11
Autopilot	26	488	6
Connect Rod	26
Directional Gyro	26	3	2
Feather Cylinder	26
Flap Contl	26
Fuel System	26	33	15
Te Panel	26
Wing Tip	26	420	42
Bulkhead Frame	25
Escape Slide	25	12	5
Fuselage	25	43	8
Shut Off	25	132	42
To Warning	25
Transverse Beam	25
Body	24	286	76
Door Switch	24	4	3
Fire Det	24
Floor Board	24	13	4
Gimbal Ring	24	1	1
Hold Open	24	207	21
Position Ind	24
Aoa Sensor	23	3	2
Base	23	438	55
Flexshaft	23	76	7
Flow Contl	23
Hyd Fluid	23
Mlg	23	2	1
Switch Wire	23
Transciever	23
Uplatch	23	4	1
Chip Light	22
Cusp Membrane	22
Extrusion	22	102	24
Nozzle Shield	22
Screws	22	1	1
Stiffner	22	5	4
Tq Sig	22
Flex Shaft	21	196	29
Frames	21
Latch Mech	21

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.