Motor Primary
No failure report names the motor primary. 2 FAA approvals let 2 companies make a replacement motor primary, Trw Aeronautical Systems Lucas Aerospace holding the most (1).
Approved replacement parts 2 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a motor primary and sell it as an approved part for the models named. These are the companies holding such approvals for a motor primary:
For these models most: Boeing 737 (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Trw Aeronautical Systems Lucas Aerospace | Motor primary, a.c. 241YH35 | 241YH35 | Boeing 737-100 Series, 737-200 Series,... | 2001-04-22 | current |
| Lucas Aerospace Cargo Sys | Motor Primary ac 241YH35 | Boeing Motor Primary A.C. 241YH35 | Boeing 737-500 Series, 737-300 Series,... | 1998-03-22 | 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.