Ring Spacer
No failure report names the ring spacer. 3 FAA approvals let 2 companies make a replacement ring spacer, Aerocess, INC holding the most (2).
Approved replacement parts 3 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a ring spacer and sell it as an approved part for the models named. These are the companies holding such approvals for a ring spacer:
For these models most: Boeing 747 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Boeing Distribution, INC. | Ring: Spacer AV3902643-01 | 3902643-01 | The Boeing Company 747-400 Series, 747-8 Series | 2024-04-12 | current |
| Aerocess, INC | Ring Spacer AC794339 | AC794339 | Hamilton Standard 14SF-5, -7, -11 | 2020-03-04 | current |
| Aerocess, INC | Ring Spacer AC786059 | AC786059 | Hamilton Standard 14RF-9 | 2020-03-04 | 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.