The U.S. aircraft register, updated daily
Parts

Bottom

No failure report names the bottom. 29 FAA approvals let 17 companies make a replacement bottom, Torrington Distributors INC holding the most (5).

Approved replacement parts 29 parts manufacturer approvals

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

For these models most: Airbus A320 (5), Boeing 737 (3), Boeing 707 (3), Robinson R44 (2), Piper PA-18 Super Cub (2), Pilatus PC-12 (2), Hughes 369 500 series helicopters (2), Boeing 747 (2), Bell 407 (2), Bell 206 JetRanger and LongRanger (2), Sikorsky S-64 (1), Sikorsky S-61 (1).

MakerPartReplacesFitsGrantedStatus
Safran Cabin INC.Bottom Assy 9561201-501BA9561201-501BADe Havilland... DHC-8-400 Series2025-08-18current
Safran Cabin INC.Bottom Assy 9561201-501BA9561201-501BADe Havilland... DHC-8-400 Series2025-08-06current
L-3 Communications Integrated SystemsBOTTOM L2111‐1Modification PartAir Tractor Inc. AT‐8022024-01-25current
Amsafe BridportBOTTOM 69-455469-4554BOEING 707-100 LONG BODY, 707-100B LONG...2022-09-27current
Amsafe BridportBOTTOM 69-455469-4554BOEING 707-300 SERIES, 707-300B SERIES,...2022-09-27current
Pilatus Business Aircraft LTD.Bottom Assy, Center Console, Wide, Sliding Keyboard PMA-12-1304-32-0079ModificationPartPilatus Aircraft Ltd. PC-122021-09-01current
Pilatus Business Aircraft LTD.Bottom Assy, Center Console, Wide, Sliding Keyboard PMA-12-1304-31-0064ModificationPartPilatus Aircraft Ltd. PC-122021-09-01current
Torrington Distributors INCBOTTOM / SAUDI PINNACLE 1059692-205EFR1059692-205EFRAirbus A320 Series2017-05-09current
Torrington Distributors INCBOTTOM / SAUDI PINNACLE 1059692-255EFR1059692-255EFRAirbus A320 Series2017-05-09current
Torrington Distributors INCBOTTOM / SAUDI PINNACLE 1059692-207EFR1059692-207EFRAirbus A320 Series2017-05-09current
Torrington Distributors INCBOTTOM / SAUDI PINNACLE 1059692-275EFR1059692-275EFRAirbus A320 Series2017-05-09current
Torrington Distributors INCBOTTOM / SAUDI PINNACLE 1059692-277EFR1059692-277EFRAirbus A320 Series2017-05-09current
Soundair Aviation ServicesBottom SP25111-15-10858609-01-0030Boeing 767-300 Series, DC-9-82 (MD-82),...2015-11-26current
Cub Crafters INCBottom 105410-01Modification PartPiper Aircraft, Inc. PA-18, PA -18S, PA-18 105 (Special)2013-09-23current
Fliegen Works INCBottom, Inner, Vibration Isolation Box IMC407-721-01Modification PartBell Helicopter Textron 206A, 206A-1, 206B2011-04-10current
Fliegen Works INCBottom/Top, Outer, Vibration Isolation Box IMC407-711-01Modification PartBell Helicopter Textron 206A, 206A-1, 206B2011-04-10current
Amsafe BridportBOTTOM 69-4554(69-4554)BOEING 707-300 SERIES, 707-300B SERIES,...2011-02-03current
Heritage Aviation LTDBottom A32-33004-13Modification PartMD Helicopters, Inc. MD9002009-08-26current
Jab Aero CORPBottom F/A 2521-2990JModificationBombardier DHC-8-300 series2009-03-15current
Aar Cargo SystemsAssembly Bottom 17026-200Modification PartBoeing 747 Series2009-01-22current
Aar Cargo SystemsAssembly Bottom 17026-300Modification PartBoeing 747 Series2009-01-22current
Plane Plastics LTDUpper Bottom, R/H K26571-14Hughes Part No. 369D26571-14Hughes 369D2008-05-22current
Plane Plastics LTDUpper Bottom, L/H K26571-13Hughes Part No. 369D26571-13Hughes 369D2008-05-22current
Cub Crafters INCBottom 105410Modification PartPiper PA-18, -18S, -18 105 Special2001-09-04current
B/E Aerospace Spg ServicesBottom Assembly. 92752-1Boeing 10-62084-301Boeing 737-300, 400, 5002001-02-12current
Astronics Luminescent Systems INCBOTTOM, LAMP HSG. W/FLANGES 5873-15873-1Boeing 757-300 series2000-04-17current
B/E Aerospace Services DivBottom Assembly 92752-1Boeing 10-62084-301Boeing 737-300, 400, 5001996-11-06current
Burns Aerospace CORP, West Coast DivBottom Assembly 92752-1Boeing 10-62084-301Boeing 737-300, 400, 5001995-01-16current
Rotair Industries INCBottom Assembly R1670-15006-3Sikorsky S1670-15006-3Sikorsky S-61L, N, NM1994-05-16current

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.