Performance Modification
No failure report names the performance modification. 1 FAA approvals let 1 company make a replacement performance modification, Quiet Wing Aerospace LLC holding the most (1).
Approved replacement parts 1 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a performance modification and sell it as an approved part for the models named. These are the companies holding such approvals for a performance modification:
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Quiet Wing Aerospace LLC | B737-400 performance modification installation QWG-2700000 | Modification part | The Boeing Company B737-400 series | 2025-02-28 | 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.