Backup Plate
No failure report names the backup plate. 2 FAA approvals let 2 companies make a replacement backup plate, Seal Dynamics INC holding the most (1).
Approved replacement parts 2 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a backup plate and sell it as an approved part for the models named. These are the companies holding such approvals for a backup plate:
For these models most: Cessna 195 (1), Cessna 190 (1), Boeing 767 (1), Boeing 747 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Seal Dynamics INC | Backup Plate 332T4730-20SD | Boeing P/N 332T4730-20 | Boeing 747-400 series, 747-400F series,... | 2012-04-12 | current |
| Bas Incorporated | Backup Plate PN 3-A-195 | Modification Part | Cessna 190, (LC-126A, B | 2011-07-18 | 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.