Compass Switch
No failure report names the compass switch. 3 FAA approvals let 2 companies make a replacement compass switch, Butler National Corporation 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 compass switch and sell it as an approved part for the models named. These are the companies holding such approvals for a compass switch:
For these models most: Douglas DC-8 (2), Mcdonnell Douglas DC-10 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Butler National Corporation | Compass Switch Unit 600917-101 | 600917-101 | McDonnell Douglas DC-8, Series (Domestic) 11, 12 | 2003-02-23 | current |
| Butler National Corporation | Compass Switch Unit 001033-101 | 001033-101 | McDonnell Douglas DC-10 Series 10, 30 and 40. | 2003-02-23 | current |
| Woodson Avionics INC | Compass Switch Unit 600917 | McDonnell Douglas 600917 | McDonnell Douglas DC-8 Series (Domestic) 11, 12, 21 | 1997-08-04 | 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.