Instrument Switch
No failure report names the instrument switch. 2 FAA approvals let 1 company make a replacement instrument switch, Butler National Corporation 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 instrument switch and sell it as an approved part for the models named. These are the companies holding such approvals for a instrument switch:
For these models most: Mcdonnell Douglas MD-11 (1), Mcdonnell Douglas DC-10 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Butler National Corporation | Instrument Switch Unit 001091-102 | 001091-102 | McDonnell Douglas MD-11 | 2003-02-23 | current |
| Butler National Corporation | Instrument Switch Unit 001091-101 | 001091-101 | McDonnell Douglas DC-10 Series 10, 30 and 40. | 2003-02-23 | 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.