Momentary Switch
No failure report names the momentary switch. 2 FAA approvals let 2 companies make a replacement momentary switch, Avtech Tyee INC 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 momentary switch and sell it as an approved part for the models named. These are the companies holding such approvals for a momentary switch:
For these models most: Boeing 767 (2), Boeing 757 (2), Boeing 737 (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Avtech Tyee INC | Momentary Switch Assy 90-22901-5 | WCS 229-5 | Boeing 737-300 Series, 737-400 Series,... | 2012-05-01 | current |
| Avtech Corporation | Momentary Switch Assy 90-22901-5 | WCS 229-5 | Boeing 737-300 Series, 737-400 Series,... | 2008-04-23 | 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.