Plug Crankshaft
No failure report names the plug crankshaft. 3 FAA approvals let 2 companies make a replacement plug crankshaft, Sun Air Parts holding the most (2).
Approved replacement parts 3 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a plug crankshaft and sell it as an approved part for the models named. These are the companies holding such approvals for a plug crankshaft:
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Combustion Technologies | Plug Crankshaft Front ASC39574 | Pratt & Whitney Aircraft 39574 | Pratt & Whitney R985 Wasp Jr AN 14b, B3 &B5 Engines | 2003-11-25 | current |
| Sun Air Parts | Plug-Crankshaft Front SAP39574 | Pratt & Whitney 39574 | Pratt & Whitney R-985 Wasp Jr. Series AN-14B, B3 and B5 only | 1997-08-27 | current |
| Sun Air Parts | Plug-Crankshaft 2-16 Thd number 55 Drill SAP15948 | Pratt & Whitney 15948 | Pratt & Whitney R-1340 Wasp series S3H1, S1H1, S1H2 | 1997-07-10 | 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.