Convex Ring
No failure report names the convex ring. 2 FAA approvals let 2 companies make a replacement convex ring, Centric Aero Technologies, LLC holding the most (1).
Approved replacement parts 2 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a convex ring and sell it as an approved part for the models named. These are the companies holding such approvals for a convex ring:
For these models most: Boeing 767 (2), Boeing 747 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Centric Aero Technologies, LLC | Convex Ring 799737-4CAT | 799737-4 | The Boeing Company 747-400, 747-400D, 747-400F | 2026-03-24 | current |
| Aviation Component Solutions | Convex Ring P00103 | 799737-4 | The Boeing Company 767-300F Series | 2024-01-19 | 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.