Duct Knob
No failure report names the duct knob. 2 FAA approvals let 2 companies make a replacement duct knob, Keystone Helicopter Corporation 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 duct knob and sell it as an approved part for the models named. These are the companies holding such approvals for a duct knob:
For these models most: Sikorsky S-76 (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Ht Parts LLC | Duct Knob 02076-10V204 | Modification Part | Sikorsky S76A, B, C | 2004-10-28 | current |
| Keystone Helicopter Corporation | Duct Knob 02076-10V204 | Modification Part | Sikorsky S76A, B, C | 2003-12-02 | 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.