Optional Spar
No failure report names the optional spar. 1 FAA approvals let 1 company make a replacement optional spar, Metal Innovations INC holding the most (1).
Approved replacement parts 1 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a optional spar and sell it as an approved part for the models named. These are the companies holding such approvals for a optional spar:
For these models most: Helicopter Transport Services CH-54 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Metal Innovations INC | Optional Spar Center Counterweight Assy 65161-00002-042MII | 65161-00002-042 | Heavy Lift Helicopters, Inc. CH-54A) Evergreen Helicopters, Inc.... | 2010-03-23 | 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.