Concave Ring
No failure report names the concave ring. 4 FAA approvals let 2 companies make a replacement concave ring, Aviation Component Solutions holding the most (3).
Approved replacement parts 4 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a concave ring and sell it as an approved part for the models named. These are the companies holding such approvals for a concave ring:
For these models most: Boeing 767 (3), Boeing 747 (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Centric Aero Technologies, LLC | Concave Ring 799738-2CAT | 799738-2 | The Boeing Company 747-400, 747-400D, 747-400F | 2026-03-24 | current |
| Aviation Component Solutions | Concave Ring P01382 | 799738-2 | The Boeing Company 767-300F Series | 2024-01-19 | current |
| Aviation Component Solutions | Concave Ring P01382 | 799738-2 | The Boeing Company 747-400 series, 747-400F series,... | 2018-01-16 | current |
| Aviation Component Solutions | Concave Ring P01382 | 799738-2 | General Electric Company CF6-80C2B1, CF6-80C2B2, CF6-80C2B4 | 2018-01-16 | 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.