Small Ring
No failure report names the small ring. 3 FAA approvals let 1 company make a replacement small ring, Basler Turbo Conversions, LLC holding the most (3).
Approved replacement parts 3 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a small ring and sell it as an approved part for the models named. These are the companies holding such approvals for a small ring:
For these models most: Douglas DC-3 (3).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Basler Turbo Conversions, LLC | Small ring bearing retainer BTC511598-3 | Goodyear 511598-3 | Boeing DC3A-SCG, DC3A-SC3G, DC3A-S1CG | 2021-02-02 | current |
| Basler Turbo Conversions, LLC | Small ring bearing closure shaped BTC511512-2 | Goodyear 511512-2 | Boeing DC3A-SCG, DC3A-SC3G, DC3A-S1CG | 2021-02-02 | current |
| Basler Turbo Conversions, LLC | Small ring bearing closure flat BTC511515-4 | Goodyear 511515-4 | Boeing DC3A-SCG, DC3A-SC3G, DC3A-S1CG | 2021-02-02 | 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.