Valve Surge
No failure report names the valve surge. 2 FAA approvals let 2 companies make a replacement valve surge, Grimes Aerospace CO 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 valve surge and sell it as an approved part for the models named. These are the companies holding such approvals for a valve surge:
For these models most: Boeing 707 (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Grimes Aerospace CO | Valve Surge By-Pass 39D28 | Boeing 10-61400-1 | Boeing 707-320 | 1992-07-15 | current |
| Fl Aerospace CORP, Janitrol Aero Div | Valve Surge Bypass 39D28 | 10-61400-1 | Boeing 707-320 | 1991-09-03 | 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.