Spar Center
No failure report names the spar center. 5 FAA approvals let 2 companies make a replacement spar center, Metal Innovations INC holding the most (3).
Approved replacement parts 5 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a spar center and sell it as an approved part for the models named. These are the companies holding such approvals for a spar center:
For these models most: Helicopter Transport Services CH-54 (3), Boeing 75 (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Metal Innovations INC | Spar Center Counterweight Assy 65160-00035-081MII | 65160-00035-081 | Heavy Lift Helicopters, Inc. CH-54A) Evergreen Helicopters, Inc.... | 2010-03-23 | current |
| Metal Innovations INC | Spar Center Counterweight Assy 65160-00035-082MII | 65160-00035-082 | Heavy Lift Helicopters, Inc. CH-54A) Evergreen Helicopters, Inc.... | 2010-03-23 | current |
| Metal Innovations INC | Spar Center Counterweight Assy 65160-00035-083MII | 65160-00035-083 | Heavy Lift Helicopters, Inc. CH-54A) Evergreen Helicopters, Inc.... | 2010-03-23 | current |
| Big Sky Stearman | Spar Assy Center Section Front BS75-1303-1 | 75-1303-1 | Boeing 75 Series | 2005-08-07 | current |
| Big Sky Stearman | Spar Assy Center Section Rear BS75-1304-1 | 75-1304-1 | Boeing 75 Series | 2005-08-07 | 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.