Crown Spline
No failure report names the crown spline. 1 FAA approvals let 1 company make a replacement crown spline, Texas Aero Support 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 crown spline and sell it as an approved part for the models named. These are the companies holding such approvals for a crown spline:
For these models most: Boeing 757 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Texas Aero Support | Crown Spline coupling 1027006T-1 | Boeing 251N4220-6 | Boeing 757-200 | 1993-03-28 | 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.