Ring Backup

No failure report names the ring backup. 38 FAA approvals let 6 companies make a replacement ring backup, Trelleborg Sealing Solutions holding the most (16).

Approved replacement parts 38 parts manufacturer approvals

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

Trelleborg Sealing Solutions 16 Coors Tetrafluor 15 Wencor LLC (Formerly Dixie Aerospace LLC) 3 Wencor LLC 2 Airwolf Aerospace, LLC 1 Airwolf Aerospace LLC (Formerly Airwolf Helicopter) 1

For these models most: Boeing 737 (20), Boeing 767 (5), Boeing 747 (5), Mcdonnell Douglas DC-9 (2), Mcdonnell Douglas Aircraft Co MD-88 (2), Boeing 777 (2), Bell 206 JetRanger and LongRanger (2), Boeing 757 (1), Boeing 727 (1).

Maker	Part	Replaces	Fits	Granted	Status
Wencor LLC	Ring-Backup 2400-347-044WE	2400-347-044	BOEING 737-600 Series, 737-700 Series,...	2020-12-23	current
Wencor LLC	Ring-Backup 2400-233-044WE	2400-233-044	BOEING 737-600 Series, 737-700 Series,...	2020-12-23	current
Airwolf Aerospace LLC (Formerly Airwolf Helicopter)	Ring Backup, Inboard, Tension Strap Retainer AA-206-010-113-005	206-010-113-5	Bell Helicopter Textron 206, 206A, 206A-1	2015-10-26	current
Airwolf Aerospace, LLC	Ring Backup, Inboard, Tension Strap Retainer AA-206-010-113-005	206-010-113-5	Bell Helicopter Textron 206, 206A, 206A-1	2015-10-26	current
Wencor LLC (Formerly Dixie Aerospace LLC)	Ring-Backup 7438FTP3WE	7438FTP3	Boeing McDonnell Douglas) (DC-9-81 (MD-81),...	2015-09-29	current
Wencor LLC (Formerly Dixie Aerospace LLC)	Ring-Backup 7451MT2NWE	7451MT2N	Boeing 767-200 Series, 767-300 Series,...	2015-09-29	current
Wencor LLC (Formerly Dixie Aerospace LLC)	Ring-Backup 743J9MT2NWE	743J9MT2N	Boeing McDonnell Douglas) (DC-9-81 (MD-81),...	2015-09-29	current
Trelleborg Sealing Solutions	RING-BACKUP BACR12BM229	BACR12BM229	THE BOEING COMPANY 737-100 SERIES, 737-200 SERIES,...	2013-04-28	current
Trelleborg Sealing Solutions	RING-BACKUP BACR12BM218	BACR12BM218	THE BOEING COMPANY 737-100 SERIES, 737-200 SERIES,...	2013-04-28	current
Trelleborg Sealing Solutions	RING-BACKUP BACR12BM219	BACR12BM219	THE BOEING COMPANY 767-400ER SERIES	2013-04-28	current
Trelleborg Sealing Solutions	RING-BACKUP BACR12BM112	BACR12BM112	THE BOEING COMPANY 767-400ER SERIES	2013-04-28	current
Trelleborg Sealing Solutions	RING-BACKUP BACR12BM219	BACR12BM219	THE BOEING COMPANY 727-200 SERIES	2013-04-28	current
Trelleborg Sealing Solutions	RING-BACKUP BACR12BM119	BACR12BM119	THE BOEING COMPANY 737-100 SERIES, 737-200 SERIES,...	2013-04-28	current
Trelleborg Sealing Solutions	RING-BACKUP BACR12BM112	BACR12BM112	THE BOEING COMPANY 737-100 SERIES, 737-200 SERIES,...	2013-04-28	current
Trelleborg Sealing Solutions	RING-BACKUP BACR12BM112	BACR12BM112	THE BOEING COMPANY 777-200 SERIES, 777-300 SERIES	2013-04-28	current
Trelleborg Sealing Solutions	RING-BACKUP BACR12BM220	BACR12BM220	THE BOEING COMPANY 737-100 SERIES, 737-200 SERIES,...	2013-04-28	current
Trelleborg Sealing Solutions	RING-BACKUP BACR12BM219	BACR12BM219	THE BOEING COMPANY 777-200 SERIES, 777-300 SERIES	2013-04-28	current
Trelleborg Sealing Solutions	RING-BACKUP BACR12BM219	BACR12BM219	THE BOEING COMPANY 737-100 SERIES, 737-200 SERIES,...	2013-04-28	current
Trelleborg Sealing Solutions	RING-BACKUP BACR12BM112	BACR12BM112	THE BOEING COMPANY 747-100 SERIES, 747-200B SERIES,...	2013-04-28	current
Trelleborg Sealing Solutions	RING-BACKUP BACR12BM218	BACR12BM218	THE BOEING COMPANY 767-200 SERIES, 767-300 SERIES,...	2013-04-28	current
Trelleborg Sealing Solutions	RING-BACKUP BACR12BM117	BACR12BM117	THE BOEING COMPANY 737-100 SERIES, 737-200 SERIES,...	2013-04-28	current
Trelleborg Sealing Solutions	RING-BACKUP BACR12BM119	BACR12BM119	THE BOEING COMPANY 767-200 SERIES, 767-300 SERIES,...	2013-04-28	current
Trelleborg Sealing Solutions	RING-BACKUP BACR12BM219	BACR12BM219	THE BOEING COMPANY 747SR SERIES	2013-04-28	current
Coors Tetrafluor	Ring-Backup BACR12BM233	Boeing BACR12BM233	Boeing 737-100, -200	1998-10-28	current
Coors Tetrafluor	Ring-Backup BACR12BM227	Boeing BACR12BM227	Boeing 757-200 767-200, -300	1998-10-28	current
Coors Tetrafluor	Ring-Backup BACR12BM216	Boeing BACR12BM216	Boeing 737-100, -200, -300	1998-10-28	current
Coors Tetrafluor	Ring-Backup BACR12BP122	Boeing BACR12BP122	Boeing 737-100, -200, -300	1998-10-28	current
Coors Tetrafluor	Ring-Backup BACR12BM010	Boeing BACR12BM010	Boeing 737-100, -200, -300	1998-10-28	current
Coors Tetrafluor	Ring-Backup BACR12BM228	Boeing BACR12BM228	Boeing 737-100, -200, -300	1998-10-28	current
Coors Tetrafluor	Ring-Backup BACR12BP231	Boeing BACR12BP231	Boeing 747-100, -200, -300	1998-10-28	current
Coors Tetrafluor	Ring-Backup BACR12BM217	Boeing BACR12BM217	Boeing 737-100, -200, -300	1998-10-28	current
Coors Tetrafluor	Ring-Backup BACR12BM432	Boeing BACR12BM432	Boeing 747-100, -200, -300	1998-10-28	current
Coors Tetrafluor	Ring-Backup BACR12BM220	Boeing BACR12BM220	Boeing 747-400 757-200 767-200, -300	1998-10-28	current
Coors Tetrafluor	Ring-Backup BACR12BM222	Boeing BACR12BM222	Boeing 737-100, -200 747-100, -200	1998-10-28	current
Coors Tetrafluor	Ring-Backup BACR12BM011	Boeing BACR12BM011	Boeing 737-100, -200, -300	1998-10-28	current
Coors Tetrafluor	Ring-Backup BACR12BM210	Boeing BACR12BM210	Boeing 737-100, -200, -300	1998-10-28	current
Coors Tetrafluor	Ring-Backup BACR12BM119	Boeing BACR12BM119	Boeing 737-100, -200 747-100, -200	1998-10-28	current
Coors Tetrafluor	Ring-Backup BACR12BM223	Boeing BACR12BM223	Boeing 737-100, -200, -300	1998-10-28	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.