Roller Valve
No failure report names the roller valve. 3 FAA approvals let 3 companies make a replacement roller valve, Superior Air Parts 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 roller valve and sell it as an approved part for the models named. These are the companies holding such approvals for a roller valve:
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Air Repair INC | Roller-Valve Tappet 2129 | 2129 | Air Repair, Inc. W670 Series | 2014-02-06 | current |
| Sun Air Parts | Roller Valve Tappet SAP5999 | Pratt & Whitney 5999 | Pratt & Whitney R-985 Wasp Jr. Series, AN-1, -3 | 1997-07-22 | current |
| Superior Air Parts INC | Roller-Valve Tappet SP-5999 | - | Pratt & Whitney R-1830-900, -90D, 92A | 1973-12-12 | 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.