Substitution
No failure report names the substitution. 3 FAA approvals let 2 companies make a replacement substitution, Moog INC holding the most (2).
Approved replacement parts 3 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a substitution and sell it as an approved part for the models named. These are the companies holding such approvals for a substitution:
For these models most: Boeing 777 (2), Boeing 737 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Moog INC | SUBSTITUTION KIT 256W3410-8 | 256W3410-8 | BOEING 777-200 SERIES, 777-200LR SERIES,... | 2022-10-14 | current |
| Moog INC | SUBSTITUTION KIT 256W3410-7 | 256W3410-7 | BOEING 777-200 SERIES, 777-200LR SERIES,... | 2022-10-14 | current |
| Gemini Engineering INC | SUBSTITUTION KIT 113A3800-13 | 113A3800-13 | Boeing 737-700 Series, 737-700C Series,... | 2009-11-15 | 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.