Composite Cowling
No failure report names the composite cowling. 4 FAA approvals let 1 company make a replacement composite cowling, Cascade Flying Service holding the most (4).
Approved replacement parts 4 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a composite cowling and sell it as an approved part for the models named. These are the companies holding such approvals for a composite cowling:
For these models most: Air Tractor Inc AT-400 (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Cascade Flying Service | Composite Lower Cowling 4120 | Modification Part | Air Tractor AT-300, -301, -302 | 2001-05-07 | current |
| Cascade Flying Service | Composite Upper Cowling 4111 | Modification Part | Air Tractor AT-400, -400A, -402 | 2001-05-07 | current |
| Cascade Flying Service | Composite Upper Cowling 4110 | Modification Part | Air Tractor AT-300, -301, -302 | 2001-05-07 | current |
| Cascade Flying Service | Composite Lower Cowling 4120 | Modification Part | Air Tractor AT-400, -400A, -402 | 2001-05-07 | 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.