The U.S. aircraft register, updated daily
Parts

Pwr Unit

No failure report names the pwr unit. 2 FAA approvals let 1 company make a replacement pwr unit, Shimadzu Precision Instru 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 pwr unit and sell it as an approved part for the models named. These are the companies holding such approvals for a pwr unit:

For these models most: Boeing 777 (2).

MakerPartReplacesFitsGrantedStatus
Shimadzu Precision Instru INCPwr Unit Cargo Dr. Act. 734-15610-03S135W131-3Boeing 777-2002000-11-27current
Shimadzu Precision Instru INCPwr Unit Cargo Dr. Hinge 734-15610-02S135W231-1Boeing 777-2002000-11-27current

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.