Buffer Air
No failure report names the buffer air. 2 FAA approvals let 2 companies make a replacement buffer air, United Technologies, Hamilton Sundstrand 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 buffer air and sell it as an approved part for the models named. These are the companies holding such approvals for a buffer air:
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| United Technologies, Hamilton Sundstrand | Buffer Air Cooler 33B7440-01 | 33B7440-01 | Pratt & Whitney Canada Corp. | 2023-01-17 | current |
| Hamilton Sundstrand | BUFFER AIR SHUTOFF VALVE 1023422 | 5318848 | Pratt & Whitney PW1217G | 2020-03-10 | 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.