Tread Fitting
No failure report names the tread fitting. 4 FAA approvals let 1 company make a replacement tread fitting, Kalitta Maintenance 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 tread fitting and sell it as an approved part for the models named. These are the companies holding such approvals for a tread fitting:
For these models most: Boeing 747 (4).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Kalitta Maintenance | Tread Fitting Assembly 232U4788-37KA | 232U4788-37 | Boeing 747-400F, 747-400SF (Special... | 2016-07-08 | current |
| Kalitta Maintenance | Tread Fitting Assembly 232U4788-31KA | 232U4788-31 | Boeing 747-400F, 747-400SF (Special... | 2016-07-08 | current |
| Kalitta Maintenance | Tread Fitting Assembly 323U4788-37KA | 323U4788-37 | The Boeing Company 747-400 Series, 747-400F Series | 2016-06-30 | current |
| Kalitta Maintenance | Tread Fitting Assembly 323U4788-31KA | 323U4788-31 | The Boeing Company 747-400 Series, 747-400F Series | 2016-06-30 | 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.