Oil Differential
No failure report names the oil differential. 3 FAA approvals let 3 companies make a replacement oil differential, Eldec Corporation holding the most (1).
Approved replacement parts 3 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a oil differential and sell it as an approved part for the models named. These are the companies holding such approvals for a oil differential:
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Eldec Corporation | Oil Differential Pressure Transducer 9-736-05 | Modification Part | Rolls-Royce RB211 TRENT 553-61, RB211 TRENT... | 2022-07-12 | current |
| Ametek Aerospace | Oil Differential Pressure Switch 8TJ201TAA1 | 340-400-403-0 (CFMI) QA07656 (Pall Aerospace) | CFM International CFM56-7B22 CFM56-7B24 CFM56-7B26... | 2017-10-15 | current |
| Ametek Aerospace and Defense, A Division of Ametek INC. | Oil Differential Pressure Switch 8TJ201TAA1 | 340-400-403-0 (CFMI) QA07656 (Pall Aerospace) | CFM International CFM56-7B22 CFM56-7B24 CFM56-7B26... | 2017-10-15 | 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.