Rider Ring

No failure report names the rider ring. 27 FAA approvals let 4 companies make a replacement rider ring, Airtomic - A Dover Company (Formerly Cook Airtomic) holding the most (17).

Approved replacement parts 27 parts manufacturer approvals

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

Airtomic - A Dover Company (Formerly Cook Airtomic) 17 Cook Airtomic 6 Valtec Aircraft Supply 2 Aviation Component Solutions 2

For these models most: Boeing 737 (9), Boeing 757 (4), Boeing 787 Dreamliner (2), Boeing 767 (1).

Maker	Part	Replaces	Fits	Granted	Status
Aviation Component Solutions	Rider Ring P01479	828759-1	The Boeing Company 787-8, 787-9, 787-10	2026-01-06	current
Aviation Component Solutions	Rider Ring P01478	1000345-3	The Boeing Company 787-8, 787-9, 787-10	2026-01-06	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring AIR21700	Honeywell P/N 3178504-1 Installed in Honeywell...	Boeing 757-300 series	2010-12-15	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring AIR21698	Honeywell P/N 3178502-1 Installed in Honeywell...	Boeing 757-300 series	2010-12-15	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring AIR22027	Hamilton Standard P/N 790254-1 and P/N 790254-2	Boeing 767-400ER	2009-11-09	current
Valtec Aircraft Supply	Rider Ring VL1405CA2	790254-1 and 790254-2 and AIR22027	General Electric CF6-80A, CF6-80A2 CF6-80C2B1, CF6-80C2B2	2004-02-09	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring AIR21700	Allied Signal 3178504-1 installed in Honeywell...	Boeing 757-200 Series, 757-200PF Series,...	2004-02-04	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring AIR21698	Allied Signal 3178502-1 installed in Honeywell...	Boeing 757-200 Series, 757-200PF Series,...	2004-02-04	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring AIR22027	Hamilton Standard 790254-1 and Hamilton...	General Electric CF6-80A when Hamilton Standard...	2004-02-04	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring AIR21698	Allied Signal 3178502-1	Pratt & Whitney 2037 when Allied Signal Aerospace...	2003-09-09	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring AIR21700	Allied Signal 3178504-1	Pratt & Whitney 2037 when Allied Signal Aerospace...	2003-09-09	current
Valtec Aircraft Supply	Rider Ring VL1405CA2	790254-1, -2, AIR22027	General Electric CF6-80A, -80A2 when Hamilton...	2003-07-14	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring AIR21700	Allied Signal 3178504-1	Pratt & Whitney 2037 when Allied Signal Aerospace...	2003-02-17	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring AIR21698	Allied Signal 3178502-1	Pratt & Whitney 2037 when Allied Signal Aerospace...	2003-02-17	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring AIR22027	Hamilton Standard 790254-1 and Hamilton...	General Electric CF6-80A when Hamilton Standard...	2003-02-17	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring Set AIR21729	AlliedSignal 3177253-1 Pneumatic High Stage...	Boeing 737-300, -400, -500 when...	2003-02-03	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring Set AIR21373	AlliedSignal 3176987-1, Pneumatic High Stage...	Boeing 737-300, -400, -500 when Allied...	2003-02-03	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring Set AIR21372	AlliedSignal 3176986-1, Pneumatic High Stage...	Boeing 737-300, -400, -500 when...	2003-02-03	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring Set AIR21372	AlliedSignal 3176986-1, Pneumatic High Stage...	Boeing 737-300, -400, -500 when...	2002-07-14	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring Set AIR21373	AlliedSignal 3176987-1, Pneumatic High Stage...	Boeing 737-300, -400, -500 when Allied...	2002-07-14	current
Airtomic - A Dover Company (Formerly Cook Airtomic)	Rider Ring Set AIR21729	AlliedSignal 3177253-1 Pneumatic High Stage...	Boeing 737-300, -400, -500 when...	2002-07-14	current
Cook Airtomic	Rider Ring Set AIR 21729	AlliedSignal 3177253-1, Pneumatic High Stage...	Boeing 737-300, -400, -500 when...	1997-12-08	current
Cook Airtomic	Rider Ring Set AIR 21372	AlliedSignal 3176986-1, Pneumatic High Stage...	Boeing 737-300, -400, -500 when...	1997-12-08	current
Cook Airtomic	Rider Ring Set AIR 21373	AlliedSignal 3176987-1, Pneumatic High Stage...	Boeing 737-300, -400, -500 when...	1997-12-08	current
Cook Airtomic	Rider Ring AIR22027	Hamilton Standard, 790254-1 and 790254-2	General Electric CF6-80A when Hamilton Standard...	1997-02-27	current
Cook Airtomic	Rider Ring AIR21700	Allied Signal - 3178504-1	Pratt & Whitney 2037 when Allied Signal Aerospace...	1996-04-21	current
Cook Airtomic	Rider Ring AIR21698	Allied Signal - 3178502-1	Pratt & Whitney 2037 when Allied Signal Aerospace...	1996-04-21	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.