Rate Gyroscope
No failure report names the rate gyroscope. 2 FAA approvals let 1 company make a replacement rate gyroscope, Butler Avionics INC. holding the most (2).
Approved replacement parts 2 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a rate gyroscope and sell it as an approved part for the models named. These are the companies holding such approvals for a rate gyroscope:
For these models most: Learjet 55 (2), Learjet 35 (2), Learjet 25 (1), Learjet 24 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Butler Avionics INC. | Rate Gyroscope, RG-227 501-1169-02 Mod A | 501-1169-02 Mod A | Learjet Models with STC ST02416SE installed... | 2026-07-10 | current |
| Butler Avionics INC. | Rate Gyroscope, RG-227 501-1169-01 Mod A | 501-1169-01 Mod A | Learjet Models with STC ST02416SE installed... | 2026-07-10 | 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.