Stop Ring

6 failure reports named the stop ring in the last ten years, 6 since 2018, most often on the Boeing 737; the condition most often found was "missing". 1 FAA approvals let 1 company make a replacement stop ring, Pacific Propeller INC holding the most (1).

Reports by year

Reports by year, as a table

	reports
2018	1
2019	1
2025	1
2026	3

Which system the reports file it under last ten years

Cabin, seats and restraints6

Reports by system, as a table

	reports
Cabin, seats and restraints	6

Models most often reporting it last ten years

Boeing 7376

Models most reported, as a table

	reports
Boeing 737	6

How it failed the condition found, last ten years

missing4broken1cracked1

Conditions found, as a table

	reports
missing	4
broken	1
cracked	1

Approved replacement parts 1 parts manufacturer approvals

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

Pacific Propeller INC 1

Maker	Part	Replaces	Fits	Granted	Status
Pacific Propeller INC	Stop Ring 70975	70975	Hamilton Sundstrand 22D30, 22D40	2005-06-27	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.