Single Mode
No failure report names the single mode. 1 FAA approvals let 1 company make a replacement single mode, New Systems holding the most (1).
Approved replacement parts 1 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a single mode and sell it as an approved part for the models named. These are the companies holding such approvals for a single mode:
For these models most: Dehavilland DHC-7 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| New Systems | Single Mode S Transponder with Bendix TCAS II Kit 103005-0100 | deHavilland DHC-7-100 | 1992-01-13 | 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.