Ring Air
No failure report names the ring air. 3 FAA approvals let 3 companies make a replacement ring air, Skycraft INC holding the most (1).
Approved replacement parts 3 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a ring air and sell it as an approved part for the models named. These are the companies holding such approvals for a ring air:
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Able Aerospace Services, INC. | Ring-Air Sealing, Compressor, 9th Stage 799572AA | 799572 | ERICKSON INCORPORATED (T73-P-1) JFTD12A-4A, (T73-P-700) JFTD12A-5A | 2017-02-01 | current active |
| Able Engineering and Component Services, INC. | Ring-Air Sealing, Compressor, 9th Stage 799572AA | 799572 | Erickson Incorporated (T73-P-1), JFTD12A-4A, (T73-P-700) | 2017-02-01 | current active |
| Skycraft INC | Ring-Air Sealing SK1660 | P&W 744279 | Pratt & Whitney JT8D-1, -1A, -1B | 1998-10-26 | 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.