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	Mostly in	Reports, 10 years	Reports since 1995	Approved replacements	Makers
Expansion Box	Fuel system	1	1
Fire Gloves	Cabin, seats and restraints	1	1
Firebane	Emergency equipment	1	1
Floorbeam Splice	Airframe structure	1	1
Gauge Glass	Cabin, seats and restraints	1	1
Gds	Flight controls	1	1
Gdu	Instruments and avionics	1	1
Gsu	Instruments and avionics	1	1
Guide Ball	Airframe structure	1	1	5	4
Hopper	Engine	1	1	3	2
Jettison Handle	Cabin, seats and restraints	1	1	1	1
Latch Catch	Airframe structure	1	1
Ldvt	Engine	1	1
Lead Tower	Engine	1	1
Lidar	Instruments and avionics	1	1
Lining Puck	Cabin, seats and restraints	1	1
Lock Screw	Engine	1	1	8	5
Lvps	Airframe structure	1	1
Modem Manager	Instruments and avionics	1	1	7	5
None Aircraft	Airframe structure	1	1
Optical Sensor	Flight controls	1	1	1	1
Pace	Flight controls	1	1
Panel Latch	Airframe structure	1	1	2	1
Ped	Airframe structure	1	1	1	1
Ratchet Sys	Flight controls	1	1
Rde	Airframe structure	1	1
Register	Heating, ice protection and utility systems	1	1
Rudder Sys	Flight controls	1	1
Ruddervator	Flight controls	1	1
Safety Net	Cabin, seats and restraints	1	1	10	2
Sample Port	Emergency equipment	1	1
Scdu	Instruments and avionics	1	1
Service Port	Electrical power	1	1
Shield Web	Airframe structure	1	1
Signal Generator	Engine	1	1
Skin Buttjoint	Airframe structure	1	1
Sliding Door	Airframe structure	1	1	36	7
Spar Angle	Airframe structure	1	1
Support Tray	Airframe structure	1	1	15	8
Test Port	Electrical power	1	1	2	2
Timing Chain	Engine	1	1
Weep Hole	Engine	1	1
Wireless Unit	Instruments and avionics	1	1
Sill		0	5,131	30	9
Clip		0	3,059	2,296	174
Floor Beam		0	1,711	567	7
Batteries		0	922
Odor		0	894
Retract Mech		0	704
Chord		0	691	339	13
Eel Battery		0	559
Floor		0	451	23	4
Smoke		0	402	3	2
Eel		0	369
Hyd Line		0	358
Keel Beam		0	351
Jamb		0	315	8	3
Cowl		0	306	186	27
Fuel Pump		0	277	422	51
Battery Charger		0	255	87	12
Fan Blade		0	221	2	2
Eel Wire		0	217
Lights		0	213	9	3
Caution Message		0	205
Prox Sensor		0	189	3	2
Eel Power		0	176
Air Distribution		0	175	3	2
Air Distr		0	173
Eel Connector		0	173
Butt Strap		0	172
Hyd Pump		0	172	9	2
Eel Batt		0	169
Clips		0	164	56	6
Bulkhead Angle		0	149	17	3
Lamp Holder		0	148	41	10
Air Dist		0	142
Power Pack		0	141	12	5
Control		0	140	887	68
Cusp		0	138
Spar Chord		0	138	4	1
Pack		0	137	141	9
Castellation		0	134
Slide Cover		0	133
Eel Wiring		0	129
Indication		0	125	1	1
Oil Press		0	123	1	1
Link Idler		0	120	8	2
Rivets		0	119
Bolts		0	116	1	1
Te Wedge		0	113	7	1
Tq Signal		0	113
Warning		0	110	3	1
Blkhd Stiffener		0	106
Fasteners		0	105
Floor Track		0	102	16	2
Coalescer		0	101	63	4
Door Pan		0	101
Cables		0	100	50	4
Galley Track		0	99
Disk Coupling		0	96

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.