Stud Shouldered
No failure report names the stud shouldered. 2 FAA approvals let 1 company make a replacement stud shouldered, Pacific Sky Supply INC holding the most (2).
Approved replacement parts 2 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a stud shouldered and sell it as an approved part for the models named. These are the companies holding such approvals for a stud shouldered:
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Pacific Sky Supply INC | Stud Shouldered Stepped -250-28 .312.24 x 2.375. AMS 5643 6871515P | 6871515 | Rolls-Royce 501-D22, -D22A | 2017-04-16 | current |
| Pacific Sky Supply INC | Stud Shouldered .250-20 NS x .250-28 UNJF-3A x .988 LG 23007270P | Allison 23007270 | Allison Engine 501-D13, 501-D13A, 501-D13D | 1994-09-06 | 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.