Curvic Coupling
No failure report names the curvic coupling. 6 FAA approvals let 2 companies make a replacement curvic coupling, Wencor LLC holding the most (4).
Approved replacement parts 6 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a curvic coupling and sell it as an approved part for the models named. These are the companies holding such approvals for a curvic coupling:
For these models most: Airbus A321 (5), Airbus A320 (5), Airbus A319 (5), Boeing 737 (2), Airbus A300 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Wencor LLC | Curvic Coupling Shaft 3840171-2HTP | 3840171-2 | Airbus A318 Model -111, A318 Model -112,... | 2021-03-19 | current |
| Wencor LLC | Curvic Coupling Shaft 3840171-2HTP | 3840171-2 | Airbus A319 Series, A319 Model-111, A319 Model-112 | 2010-12-20 | current |
| Wencor LLC | Curvic Coupling Shaft 3840170-2HTP | 3840170-2 | Airbus A319 Series, A319 Model-111, A319 Model-112 | 2010-12-20 | current |
| Wencor LLC | Curvic Coupling 3840011-3HTP | 3840011-3 | Airbus A300-600, A300, Model B4-601 | 2010-12-20 | current |
| Ht Parts LLC | Curvic Coupling Shaft 3840171-2HTP | 3840171-2 | Airbus A319-111, -112, -113 | 2003-04-29 | current |
| Ht Parts LLC | Curvic Coupling Shaft 3840170-2HTP | 3840170-2 | Airbus A319-111, -112, -113 | 2003-04-29 | 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.