Stub Rib
No failure report names the stub rib. 4 FAA approvals let 1 company make a replacement stub rib, Big Sky Stearman 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 stub rib and sell it as an approved part for the models named. These are the companies holding such approvals for a stub rib:
For these models most: Boeing PT-13 (4), Boeing A75 Stearman Kaydet (4).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Big Sky Stearman | Stub Rib, Right Aileron BS75-1402L-2-1 | Modification Part | BOEING A75L3 75 (Army PT-13) A75 (Army... | 2010-02-21 | current |
| Big Sky Stearman | Stub Rib, Left Aileron BS75-1402L-2 | Modification Part | BOEING A75L3 75 (Army PT-13) A75 (Army... | 2010-02-21 | current |
| Big Sky Stearman | Stub Rib, Left BS75-1402U-2 | Modification Part | BOEING A75L3 75 (Army PT-13) A75 (Army... | 2010-02-21 | current |
| Big Sky Stearman | Stub Rib, Right BS75-1402U-2-1 | Modification Part | BOEING A75L3 75 (Army PT-13) A75 (Army... | 2010-02-21 | 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.