Shaft Ass
No failure report names the shaft ass. 4 FAA approvals let 1 company make a replacement shaft ass, Helicopter Technology INC 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 shaft ass and sell it as an approved part for the models named. These are the companies holding such approvals for a shaft ass:
For these models most: Bell 47 (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Helicopter Technology INC | Shaft Ass'y, Tail Rotor Drive R47-644-187-17 | Bell P/N 047-644-187-17 | Bell Helicopter Company BHC) (Bell 47D-1, 47G, -2 | 2011-12-08 | current |
| Helicopter Technology INC | Shaft Ass'y, Tail Rotor Drive R47-644-180-9 | Bell P/N 047-644-180-9 | Bell Helicopter Company BHC) (Bell 47D-1, 47G and -2 and... | 2011-12-08 | current |
| Helicopter Technology INC | Shaft Ass'y, Main, Tail Rotor Drive R47-644-214-9 | Bell P/N 047-644-214-9 | Bell Helicopter Company BHC) (Bell 47G-2A, -2A-1, -4 | 2011-12-08 | current |
| Helicopter Technology INC | Shaft Ass'y, Tail Rotor Drive R47-644-180-11 | Bell P/N 047-644-180-11 | Bell Helicopter Company BHC) (Bell 47G-2A, -2A-1, -4 | 2011-12-08 | 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.