Tertiary Lock
No failure report names the tertiary lock. 5 FAA approvals let 4 companies make a replacement tertiary lock, Woodward Hrt, INC holding the most (2).
Approved replacement parts 5 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a tertiary lock and sell it as an approved part for the models named. These are the companies holding such approvals for a tertiary lock:
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Woodward Hrt, INC | Tertiary Lock P516A0001-00 | P516A0001-00 | Rolls-Royce... BR700-710D5-21 | 2020-08-26 | current |
| Woodward Hrt, INC | Tertiary Lock P516A0001-00 | P516A0001-00 | Rolls-Royce... BR700-710A1-10, BR700-710A2-20,... | 2019-05-30 | current |
| Woodward Hrt - Duarte | Tertiary Lock P516A0001-00 | P516A0001-00 | Rolls-Royce... BR700-710A1-10 BR700-710A2-20 BR700-710C4-11 | 2019-05-30 | current |
| Woodward Hrt INC | Tertiary Lock P516A0001-00 | P516A0001-00 | Rolls Royce BR700-710A1-10, BR700-710A2-20,... | 2013-04-15 | current |
| Ge Aviation LLC (Formerly Smiths Aerospace) | Tertiary Lock P516A0001-00 | P516A0001-00 | Rolls Royce BR700-170A1-10, BR700-710A2-20,... | 2012-08-20 | 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.