Unit Power
No failure report names the unit power. 4 FAA approvals let 2 companies make a replacement unit power, Trw Aeronautical Systems Lucas Aerospace holding the most (2).
Approved replacement parts 4 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a unit power and sell it as an approved part for the models named. These are the companies holding such approvals for a unit power:
For these models most: Boeing 777 (2), Boeing 767 (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Trw Aeronautical Systems Lucas Aerospace | Unit assembly power drive 181RA71R206C | S451T201-13 | Boeing 767-200 Series, 767-300 Series | 2001-04-22 | current |
| Trw Aeronautical Systems Lucas Aerospace | Unit assembly power drive 192AD1R218B | S451T211-5 | Boeing 777-200 Series, 777-300 Series | 2001-04-22 | current |
| Lucas Aerospace Cargo Sys | Unit assembly power drive 181RA71R206C | Boeing S451T201-13 | Boeing 767-200, 300 | 1997-11-18 | current |
| Lucas Aerospace Cargo Sys | Unit assembly power drive 192AD1R218B | Boeing S451W211-5-5 | Boeing 777-200 | 1997-11-18 | 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.