Spar Butt
No failure report names the spar butt. 6 FAA approvals let 2 companies make a replacement spar butt, Dakota Cub Aircraft of Alaska holding the most (4).
Approved replacement parts 6 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a spar butt and sell it as an approved part for the models named. These are the companies holding such approvals for a spar butt:
For these models most: Piper PA-18 Super Cub (4), Piper PA-11 Cub Special (4), Piper J-3 Cub (4), Taylorcraft F21 (1), Taylorcraft Aviation Corp F19 (1), Taylorcraft Aviation Corp 19 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Dakota Cub Aircraft of Alaska | Front Spar Butt Hinge DC10401 | modification part | Piper J-3, PA-11, PA-11S | 2005-03-03 | current |
| Dakota Cub Aircraft of Alaska | Rear Spar Butt Hinge DC14161 | modification part | Piper J-3, PA-11, PA-11S | 2005-03-03 | current |
| Dakota Cub Aircraft of Alaska | Rear Spar Butt Hinge DC14161 | modification part | Piper J-3, PA-11, PA-11S | 2001-01-17 | current |
| Dakota Cub Aircraft of Alaska | Front Spar Butt Hinge DC10401 | modification part | Piper J-3, PA-11, PA-11S | 2001-01-17 | current |
| Taylorcraft Aircraft CORP | Rear Spar Butt Fitting A-A807 | A-A807 | Taylorcraft 19, F19, F21 | 1993-12-01 | current |
| Taylorcraft Aircraft CORP | Rear Spar Butt Fittings A-A807 | A-A807 | Taylorcraft All B Models | 1993-12-01 | 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.