Cuplock
No failure report names the cuplock. 5 FAA approvals let 3 companies make a replacement cuplock, Turbo Technologies LLC holding the most (3).
Approved replacement parts 5 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a cuplock and sell it as an approved part for the models named. These are the companies holding such approvals for a cuplock:
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Turbo Technologies LLC | Cuplock, Retention- Prop Shaft Thrust Nut Lock 23003504TT | 23003504 | Rolls-Royce 501-D13, 501-D13A, 501-D13D | 2024-07-02 | current |
| Extex Engineered Products INC | Cuplock, Retention-Prop Shaft Thrust Nut Lock 23003504TA | 23003504 | Rolls-Royce 501-D13, D22, D22A | 2016-09-07 | current |
| Turbo Technologies LLC | Cuplock, Retention - Prop Shaft Thrust Nut Lock 23003504TT | 23003504 | Rolls-Royce 501-D13, -D13A, -D13D | 2016-02-04 | current |
| Pacific Sky Supply INC | Cuplock, Retention-Prop Shaft Thrust Nut Lock 23003504P | 23003504 | Rolls-Royce 501-D13, -D13A, -D13D | 2006-03-30 | current |
| Turbo Technologies LLC | CUPLOCK, RETENTION-PROP SHAFT THRUST NUT LOCK T23003504 | 23003504 | Rolls-Royce 501-D13, -D22, -D22A | 2003-06-24 | 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.