Stiffener Rib
No failure report names the stiffener rib. 2 FAA approvals let 1 company make a replacement stiffener rib, Seattle Aero LLC holding the most (2).
Approved replacement parts 2 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a stiffener rib and sell it as an approved part for the models named. These are the companies holding such approvals for a stiffener rib:
For these models most: Boeing 757 (1), Boeing 737 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Seattle Aero LLC | Stiffener-Rib WSTA 583 737-4255-1, 737-4255-2,... | 737-4255-1, 737-4255-2, 737-4255-3,... | Boeing 737-300 | 2007-02-27 | current |
| Seattle Aero LLC | Stiffener Rib, 15 757-3152-13, 757-3152-15 | 757-3152-13, 757-3152-15 | Boeing 757-200 Series | 2006-10-03 | 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.