Rib Main
No failure report names the rib main. 3 FAA approvals let 2 companies make a replacement rib main, Spirit Aerosystems INC holding the most (2).
Approved replacement parts 3 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a rib main and sell it as an approved part for the models named. These are the companies holding such approvals for a rib main:
For these models most: Boeing 737 (2), Boeing 75 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Spirit Aerosystems INC | Rib Assy.- Main Track Rib Pair, SS 122.69, OUTBD Fixed LE 116A7270-24 | 116A7270-24 | Boeing 737-600 Series, 737-700 Series,... | 2015-07-15 | current |
| Big Sky Stearman | Rib Assy Main Lwr Wing BS75-1205 | 75-1205 | Boeing 75 Series | 2007-06-28 | current |
| Spirit Aerosystems INC | Rib Assy.- Main Track Rib Pair, SS 122.69, OUTBD Fixed LE 116A7270-24 | 116A7270-24 | Boeing 737-600 Series, 737-700 Series,... | 2005-11-03 | 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.