Positive Negative
No failure report names the positive negative. 2 FAA approvals let 1 company make a replacement positive negative, Hr Textron INC 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 positive negative and sell it as an approved part for the models named. These are the companies holding such approvals for a positive negative:
For these models most: Cessna 750 Citation X (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Hr Textron INC | Positive-Negative Relief Valve 404700-1 | 9912501-1 | Cessna 750 | 1999-12-08 | current |
| Hr Textron INC | Positive-Negative Relief Valve 404700-3 | 9912501-2 | Cessna 750 | 1999-12-08 | 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.