Matrix
No failure report names the matrix. 4 FAA approvals let 2 companies make a replacement matrix, Korry Electronics CO holding the most (3).
Approved replacement parts 4 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a matrix and sell it as an approved part for the models named. These are the companies holding such approvals for a matrix:
For these models most: Boeing 737 (2), Gulfstream GV-SP G550 (1), Boeing 767 (1), Boeing 757 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| L3 Communications Integrated Systems LP | Matrix, SHF ESE156-0000-2 | Modification Article | Gulfstream Aerospace Corp. GV-SP | 2026-08-25 | current |
| Korry Electronics CO | Matrix Assembly, 1x5+1, 428, Lighted Switch Matrix 13504-004 | 13504-001 | BOEING 737-300, 737-400, 737-500 | 2009-10-07 | current |
| Korry Electronics CO | Matrix Assembly, 1x5+1, 428, Switch Matrix 13504-001 | 13504-001 | BOEING 737-300, 737-400, 737-500 | 2009-10-07 | current |
| Korry Electronics CO | Matrix 433-674-1032-2019 | Boeing S231T301-2104 | Boeing 757-200, 767-200, -300 | 1992-08-31 | 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.