Stud Crankcase
No failure report names the stud crankcase. 1 FAA approvals let 1 company make a replacement stud crankcase, Sun Air Parts holding the most (1).
Approved replacement parts 1 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a stud crankcase and sell it as an approved part for the models named. These are the companies holding such approvals for a stud crankcase:
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Sun Air Parts | Stud-Crankcase Main SAP4447 | Pratt & Whitney 4447 | Pratt & Whitney R-985 Wasp Jr. Series, AN-1, -3 | 1997-07-22 | 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.