Parts · Airframe structure

Spar

1,639 failure reports named the spar in the last ten years, 5,905 since 1995, most often on the Boeing 737; the condition most often found was "cracked". 109 FAA approvals let 20 companies make a replacement spar, Spirit Aerosystems INC holding the most (14). The reports call it "spar", "rear spar", "front spar", "spar assy", "aft spar" and 1 other ways.

Reports by year

Reports by year, as a table

	reports
1995	218
1996	197
1997	207
1998	242
1999	258
2000	208
2001	230
2002	209
2003	151
2004	191
2005	159
2006	236
2007	187
2008	155
2009	158
2010	149
2011	183
2012	250
2013	181
2014	174
2015	323
2016	295
2017	140
2018	97
2019	151
2020	204
2021	183
2022	132
2023	91
2024	105
2025	172
2026	69

Which system the reports file it under last ten years

Airframe structure1,635Fuel system2Rotorcraft systems2

Reports by system, as a table

	reports
Airframe structure	1,635
Fuel system	2
Rotorcraft systems	2

Models most often reporting it last ten years

Boeing 737361Embraer ERJ 170 E170 and E175279Boeing 767126Mcdonnell Douglas MD-1197Cessna 680 Citation Sovereign and Latitude95Airbus A32059Boeing 74755Bombardier CL-600 Challenger and CRJ55Boeing 77751Mcdonnell Douglas Aircraft Co MD-8848Embraer EMB-145 ERJ 14544Boeing 71741

Models most reported, as a table

	reports
Boeing 737	361
Embraer ERJ 170 E170 and E175	279
Boeing 767	126
Mcdonnell Douglas MD-11	97
Cessna 680 Citation Sovereign and Latitude	95
Airbus A320	59
Boeing 747	55
Bombardier CL-600 Challenger and CRJ	55
Boeing 777	51
Mcdonnell Douglas Aircraft Co MD-88	48
Embraer EMB-145 ERJ 145	44
Boeing 717	41

How it failed the condition found, last ten years

cracked883corroded505damaged120gouged37chafed19delaminated11not reported11none9unknown8worn5

Conditions found, as a table

	reports
cracked	883
corroded	505
damaged	120
gouged	37
chafed	19
delaminated	11
not reported	11
none	9
unknown	8
worn	5

Engines most often reporting it

General Electric GE90 series 4Allison (Rolls-Royce) 501-D22 3Continental IO-550-C 2Lycoming O-360 series 2Allison (Rolls-Royce) 501-D13 series 1CFM International CFM56-7B27 1CFM International CFM56 series 1International Aero Engines V2527-A5 1Lycoming AEIO-360 series 1Lycoming IO-360-L2A 1

Approved replacement parts 109 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a spar and sell it as an approved part for the models named. These are the companies holding such approvals for a spar:

Spirit Aerosystems INC 14Dakota Cub Aircraft 14Don Luscombe the, Aviation History Foundation 13Global Helicopter Technology INC 9Aviation Enterprises 9Big Sky Stearman 8Dakota Cub Aircraft of Alaska 7Srs Aviation LLC 6Gulfstream Aerospace LP 6Gulfstream Aerospace Corporation 6Galaxy Aerospace CO LP 4Airframes Alaska 3Henderson Aero Specialities INC 2Aero Fabricators INC 2Taylorcraft Aircraft CORP 1Metal Innovations INC 1Kenmore Air Harbor INC 1Interstate Aircraft CO 1Erickson Incorporated DBA Erickson Air-Crane 1Aviadesign INC 1

For these models most: Piper PA-18 Super Cub (17), Piper J-3 Cub (16), Israel Aircraft Industries GALAXY (14), Piper PA-11 Cub Special (13), Luscombe T-8 (13), Luscombe 8 Silvaire (13), Boeing 737 (11), Cessna T337 (9), Cessna P337 (9), Cessna 337 Skymaster (9), Boeing 75 (8), Garlick Helicopters Inc UH-1 (7).

Maker	Part	Replaces	Fits	Granted	Status
Kenmore Air Harbor INC	Spar KAH3W101-105	Modification Part	Viking Air Limited DHC-3	2019-11-04	current
Srs Aviation LLC	Spar 35-165050-69SRS	35-165050-69	Beechcraft 35-33, 35-A33, 35-B33	2017-08-27	current
Srs Aviation LLC	Spar 35-165050-68SRS	35-165050-68	Beechcraft 35-33, 35-A33, 35-B33	2017-08-27	current
Srs Aviation LLC	Spar 33-130000-1SRS	33-130000-1	Beechcraft 35-33, 35-A33, 35-B33	2017-08-27	current
Srs Aviation LLC	SPAR - RH 45-610007-2SRS	45-610007-2	Beechcraft 35-33, 35-A33, 35-B33	2017-04-19	current
Srs Aviation LLC	SPAR - REAR 45-610008-SRS	45-610008	Beechcraft 35-33, 35-A33, 35-B33	2017-04-19	current
Srs Aviation LLC	SPAR - LH 45-610007-1SRS	45-610007-1	Beechcraft 35-33, 35-A33, 35-B33	2017-04-19	current
Erickson Incorporated DBA Erickson Air-Crane	Spar Assembly, Elevator-Tailboom 214-021-101-111	214-021-101-111	Bell 214ST	2015-12-15	current
Spirit Aerosystems INC	Spar 114A6111-3	114A6111-3	Boeing 737-600 SERIES, 737-700 SERIES,...	2015-07-22	current
Spirit Aerosystems INC	Spar 114N4168-4	114N4168-4	Boeing 757-300 SERIES	2015-07-22	current
Spirit Aerosystems INC	SPAR 114N4168-3	114N4168-3	Boeing 757-300 SERIES	2015-07-22	current
Spirit Aerosystems INC	FRONT SPAR ASSY 182A2401-15	182A2401-15	Boeing 737-600 SERIES, 737-700 SERIES,...	2015-07-07	current
Spirit Aerosystems INC	FRONT SPAR ASSY 172A2001-21	172A2001-21	Boeing 737-600 SERIES, 737-700 SERIES,...	2015-07-07	current
Spirit Aerosystems INC	FRONT SPAR ASSY 182A2401-16	182A2401-16	Boeing 737-600 SERIES, 737-700 SERIES,...	2015-07-07	current
Spirit Aerosystems INC	FRONT SPAR ASSY 172A2001-21	172A2001-21	The Boeing Company 737-600 SERIES, 737-700 SERIES,...	2013-02-10	current
Spirit Aerosystems INC	FRONT SPAR ASSY 182A2401-16	182A2401-16	The Boeing Company 737-600 SERIES, 737-700 SERIES,...	2013-02-10	current
Spirit Aerosystems INC	FRONT SPAR ASSY 182A2401-15	182A2401-15	The Boeing Company 737-600 SERIES, 737-700 SERIES,...	2013-02-10	current
Aero Fabricators INC	Spar Assembly - Rear AF11223	Piper P/N 11223	Piper J-3, J3C-40, J3C-50	2011-09-25	current
Aero Fabricators INC	Spar Assembly - Front AF11233	Piper P/N 11233	Piper J-3, J3C-40, J3C-50	2011-09-25	current
Metal Innovations INC	Spar Assy 65160-00003-041MII	65160-00003-041	Heavy Lift Helicopters, Inc. CH-54A) Evergreen Helicopters, Inc....	2010-03-23	current
Gulfstream Aerospace Corporation	Rear Spar 4AS1750031-001	4AS1750031-001	Gulfstream Aerospace LP Galaxy, Gulfstream 200	2008-04-01	current
Gulfstream Aerospace Corporation	Rear Spar 4AS1750031-002	4AS1750031-002	Gulfstream Aerospace LP Galaxy, Gulfstream 200	2008-04-01	current
Airframes Alaska	Spar - Front DC14383	Mod Part	Piper J-3, PA-11, PA-11S	2008-03-23	current
Airframes Alaska	Spar - Rear DC14392	Mod Part	Piper PA-18, PA-18S, PA-18 105	2008-03-23	current
Airframes Alaska	Spar- Rear DC14453	Mod Part	Piper J-3, PA-11, PA-11S	2008-03-23	current
Spirit Aerosystems INC	Spar 114A6111-3	114A6111-3	Boeing 737-600 SERIES, 737-700 SERIES,...	2008-02-20	current
Spirit Aerosystems INC	SPAR 114N4168-3	114N4168-3	Boeing 757-300 SERIES	2007-08-02	current
Spirit Aerosystems INC	FRONT SPAR ASSEMBLY 172A2001-21	172A2001-21	Boeing 737-600 SERIES, 737-700 SERIES,...	2005-09-23	current
Spirit Aerosystems INC	FRONT SPAR ASSEMBLY 182A2401-15	182A2401-15	Boeing 737-600 SERIES, 737-700 SERIES,...	2005-09-23	current
Spirit Aerosystems INC	FRONT SPAR ASSEMBLY 182A2401-16	182A2401-16	Boeing 737-600 SERIES, 737-700 SERIES,...	2005-09-23	current
Big Sky Stearman	Spar Assy, Lower Rear, Left BS75-1204-2	75-1204-2	Boeing 75 Series	2005-08-07	current
Big Sky Stearman	Spar Assy, Lower Front, Right BS75-1203-3	75-1203-3	Boeing 75 Series	2005-08-07	current
Big Sky Stearman	Spar Assy, Lower Rear, Right BS75-1204-3	75-1204-3	Boeing 75 Series	2005-08-07	current
Big Sky Stearman	Spar Assy, Upper Rear, Right BS75-1104-3	75-1104-3	Boeing 75 Series	2005-08-07	current
Big Sky Stearman	Spar Assy, Lower Front, Left BS75-1203-2	75-1203-2	Boeing 75 Series	2005-08-07	current
Big Sky Stearman	Spar Assy, Upper Rear, Left BS75-1104-2	75-1104-2	Boeing 75 Series	2005-08-07	current
Big Sky Stearman	Spar Assy, Upper Front, Right BS75-1103-3	75-1103-3	Boeing 75 Series	2005-08-07	current
Big Sky Stearman	Spar Assy, Upper Front, Left BS75-1103-2	75-1103-2	Boeing 75 Series	2005-08-07	current
Gulfstream Aerospace Corporation	Rear Spar 4AS1750031-002	4AS1750031-002	Gulfstream Galaxy, 200	2005-05-09	current
Gulfstream Aerospace Corporation	Rear Spar 4AS1750031-001	4AS1750031-001	Gulfstream Galaxy, 200	2005-05-09	current
Dakota Cub Aircraft of Alaska	Spar Front DC14383	modification part	Piper J-3, PA-11, PA-11S	2005-03-03	current
Dakota Cub Aircraft of Alaska	Spar- Rear DC14453	modification part	Piper J-3, PA-11, PA-11S	2005-03-03	current
Dakota Cub Aircraft of Alaska	Spar Rear DC14392	modification part	Piper PA-18, PA-18S, PA-18 "105	2005-03-03	current
Gulfstream Aerospace Corporation	Rear Spar 4AS1750031-002	4AS1750031-002	Gulfstream Galaxy and 200	2005-02-21	current
Gulfstream Aerospace Corporation	Rear Spar 4AS1750031-001	4AS1750031-001	Gulfstream Galaxy and 200	2005-02-21	current
Aviadesign INC	Front Spar, Failsafe Strap All parts noted on...	Modification Part	Raytheon Beech 35, 35R, A35	2004-02-09	current
Dakota Cub Aircraft	Spar-Rear DC14453-5	Piper P/N 14453-4 14453-5	Piper PA-18, PA-18S, PA-18 105	2003-03-13	current
Dakota Cub Aircraft	Spar-Rear DC14453-2	Piper P/N 14453-2 14453-3	Piper J-3, PA-11, PA-11S	2003-03-13	current
Dakota Cub Aircraft	Spar-Front DC14383-4	Piper P/N 14383-4 14383-5	Piper PA-18, PA-18S, PA-18 105	2003-03-13	current
Dakota Cub Aircraft	Spar-Rear DC14453-3	Piper P/N 14453-2 14453-3	Piper J-3, PA-11, PA-11S	2003-03-13	current
Dakota Cub Aircraft	Spar-Front DC14383-2	Piper P/N 14383-2 14383-3	Piper J-3, PA-11, PA-11S	2003-03-13	current
Dakota Cub Aircraft	Spar-Front DC14383-3	Piper P/N 14383-2 14383-3	Piper J-3, PA-11, PA-11S	2003-03-13	current
Dakota Cub Aircraft	Spar-Rear DC14392-3	Piper P/N 14392-2 14392-3	Piper PA-18 150, PA-18A 150, PA-18S 150	2003-03-13	current
Dakota Cub Aircraft	Spar-Front DC14383-5	Piper P/N 14383-4 14383-5	Piper PA-18, PA-18S, PA-18 105	2003-03-13	current
Dakota Cub Aircraft	Spar-Rear DC14392-2	Piper P/N 14392-2 14392-3	Piper PA-18 150, PA-18A 150, PA-18S 150	2003-03-13	current
Dakota Cub Aircraft	Spar-Rear DC14453-4	Piper P/N 14453-4 14453-5	Piper PA-18, PA-18S, PA-18 105	2003-03-13	current
Aviation Enterprises	Spar-Rear RH AE 1425000-44	1425000-44	Cessna 336 series, 337 series, T337 series	2003-02-11	current
Aviation Enterprises	Spar-Rear AE 1425010-20	1425010-20	Cessna 336 series, 337 series, T337 series	2003-02-11	current
Aviation Enterprises	Spar-Front RH AE 1425000-36	1425000-36	Cessna 336 series, 337 series, T337 series	2003-02-11	current
Aviation Enterprises	Spar-Rear LH AE 1425000-43	1425000-43	Cessna 336 series, 337 series, T337 series	2003-02-11	current
Aviation Enterprises	Spar-Front LH AE 1425000-35	1425000-35	Cessna 336 series, 337 series, T337 series	2003-02-11	current
Don Luscombe the, Aviation History Foundation	Spar Assembly Front 38207	38207	Luscombe 8, 8A, 8B	2002-12-15	current
Don Luscombe the, Aviation History Foundation	Spar Assembly 38484-2	38484-2	Luscombe 8, 8A, 8B	2002-12-15	current
Don Luscombe the, Aviation History Foundation	Spar Assembly Rear 38208	38208	Luscombe 8, 8A, 8B	2002-12-15	current
Don Luscombe the, Aviation History Foundation	Spar Assembly Rear 38208-1	38208-1	Luscombe 8, 8A, 8B	2002-12-15	current
Don Luscombe the, Aviation History Foundation	Spar, Assembly 38483-3	38483-3	Luscombe 8, 8A, 8B	2002-12-15	current
Don Luscombe the, Aviation History Foundation	Spar, Assembly 38483-10	38483-10	Luscombe 8, 8A, 8B	2002-12-15	current
Don Luscombe the, Aviation History Foundation	Spar Assembly Front 38207-1	38207-1	Luscombe 8, 8A, 8B	2002-12-15	current
Don Luscombe the, Aviation History Foundation	Spar Assembly 38484	38484	Luscombe 8, 8A, 8B	2002-12-15	current
Don Luscombe the, Aviation History Foundation	Spar Assembly Front 38478	38478	Luscombe 8, 8A, 8B	2002-12-15	current
Don Luscombe the, Aviation History Foundation	Spar Assembly 38411	38411	Luscombe 8, 8A, 8B	2002-12-15	current
Don Luscombe the, Aviation History Foundation	Spar Assembly 38411-2	38411-2	Luscombe 8, 8A, 8B	2002-12-15	current
Don Luscombe the, Aviation History Foundation	Spar, Assembly 38483-20	38483-20	Luscombe 8, 8A, 8B	2002-12-15	current
Don Luscombe the, Aviation History Foundation	Spar, Assembly 38483-2	38483-2	Luscombe 8, 8A, 8B	2002-12-15	current
Dakota Cub Aircraft	Spar - Flap DC12478	Modification Part	Piper PA-18, PA-18S, PA-18 105	2002-09-26	current
Dakota Cub Aircraft	Spar - Flap DC12478-2	Modification Part	Piper PA-18, PA-18S, PA-18 105	2002-09-26	current
Dakota Cub Aircraft	Spar - Aileron DC42972	Modification Part	Piper J-3, PA-11, PA-11S	2002-09-26	current
Dakota Cub Aircraft	Spar - Aileron DC42972-1	Modification Part	Piper J-3, PA-11, PA-11S	2002-09-26	current
Aviation Enterprises	Front Spar-LH AE 1424000-25	1424000-25	Cessna 337 series, T337 series, P337 series	2002-05-05	current
Aviation Enterprises	Front Spar-RH AE 1424000-24	1424000-24	Cessna 337 series, T337 series, P337 series	2002-05-05	current
Aviation Enterprises	Rear Spar-LH AE 1424000-27	1424000-27	Cessna 337 series, T337 series, P337 series	2002-05-05	current
Aviation Enterprises	Rear Spar-RH AE 1424000-26	1424000-26	Cessna 337 series, T337 series, P337 series	2002-05-05	current
Interstate Aircraft CO	Spar - Aileron C2B-2151	C2B-2151	Interstate... S-1B2	2001-12-18	current
Global Helicopter Technology INC	Spar, Forward Vertical Fin Installation VTF-030-801	Modification Part	Garlick Helicopters UH-1B, UH-1E, HH-1K	2001-10-28	current
Global Helicopter Technology INC	Spar, Forward Vertical Fin Installation VTF-030-802	Modification Part	Garlick Helicopters UH-1B, UH-1B, UH-1B	2001-10-28	current
Global Helicopter Technology INC	Spar, Forward Vertical Fin Installation VTF-030-800	Modification Part	Bell 204B, UH-1E, UH-1E	2001-10-28	current
Global Helicopter Technology INC	Spar, Forward, Vertical Fin Installation VTF-030-800	Modification Part	Arrow Falcon Exporters UH-1H, UH-1F, UH-1H	2001-10-28	current
Gulfstream Aerospace LP	Front Spar 4AS1750033-002	IAI 4AS1750033-002	Gulfstream Galaxy	2001-07-30	current
Gulfstream Aerospace LP	Front Spar 4AS1750033-001	IAI 4AS1750033-001	Gulfstream Galaxy	2001-07-30	current
Global Helicopter Technology INC	Spar, Forward Vertical Fin Installation VTF-030-801	Modification Part	Garlick Helicopters UH-1B, UH-1E, HH-1K	2001-07-05	current
Gulfstream Aerospace LP	Spar, MLG Door 4AS2650244-002	IAI 4AS2650244-002	Gulfstream Galaxy	2001-06-06	current
Gulfstream Aerospace LP	Spar, MLG Door 4AS2650245-001	IAI 4AS2650245-001	Gulfstream Galaxy	2001-06-06	current
Gulfstream Aerospace LP	Spar, MLG Door 4AS2650245-002	IAI 4AS2650245-002	Gulfstream Galaxy	2001-06-06	current
Gulfstream Aerospace LP	Spar, MLG Door 4AS2650244-001	IAI 4AS2650244-001	Gulfstream Galaxy	2001-06-06	current
Galaxy Aerospace CO LP	Spar, MLG Door 4AS2650244-002	IAI 4AS2650244-002	Gulfstream Galaxy	2001-05-08	current
Galaxy Aerospace CO LP	Spar, MLG Door 4AS2650245-002	IAI 4AS2650245-002	Gulfstream Galaxy	2001-05-08	current
Galaxy Aerospace CO LP	Spar, MLG Door 4AS2650244-001	IAI 4AS2650244-001	Gulfstream Galaxy	2001-05-08	current
Galaxy Aerospace CO LP	Spar, MLG Door 4AS2650245-001	IAI 4AS2650245-001	Gulfstream Galaxy	2001-05-08	current
Global Helicopter Technology INC	Spar, Forward Vertical Fin Installation VTF-030-802	Modification Part	US Helicopter UH-1A, UH-1B, SW204	2001-04-30	current
Global Helicopter Technology INC	Spar, Forward Vertical Fin Installation VTF-030-801	Modification Part	Robinson Helicopter UH-1F, UH-1P, TH-1F	2001-04-30	current
Global Helicopter Technology INC	Spar, Forward, Vertical Fin Installation VTF-030-800	Modification Part	US Helicopter UH-1H, SW205, UH-1H	2001-04-30	current
Global Helicopter Technology INC	Spar, Forward, ..Vertical Fin Installation VTF-030-800	Modification Part	US Helicopter UH-1A, UH-1B, UH-1E	2001-02-22	current
Dakota Cub Aircraft of Alaska	Spar - Front DC14383	modification part	Piper J-3, PA-11, PA-11S	2001-01-17	current
Dakota Cub Aircraft of Alaska	Spar- Rear DC14453	modification part	Piper J-3, PA-11, PA-11S	2001-01-17	current
Dakota Cub Aircraft of Alaska	Spar - Aileron DC42972, DC42972-1	modification part	Piper J-3, PA-11, PA-11S	2001-01-17	current
Dakota Cub Aircraft of Alaska	Spar - Rear DC14392	modification part	Piper PA-18, PA-18S, PA-18 105	2001-01-17	current
Henderson Aero Specialities INC	Spar - Aileron H40301-3	40301-3	Piper J5A, J5C, HE-1	1995-07-23	current
Henderson Aero Specialities INC	Spar - Aileron H40301-2	40301-2	Piper J-3, L-4, L-4B	1995-07-23	current
Taylorcraft Aircraft CORP	Spar Assembly Front 2570-1	2570-1	Taylorcraft 19, F19, F21	1993-11-08	current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.