The U.S. aircraft register, updated daily
Parts

Relay Ac

No failure report names the relay ac. 1 FAA approvals let 1 company make a replacement relay ac, Hartman Electrical Mfg 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 relay ac and sell it as an approved part for the models named. These are the companies holding such approvals for a relay ac:

For these models most: Saab-Fairchild 340 (1).

MakerPartReplacesFitsGrantedStatus
Hartman Electrical MfgRelay AC Current Sensor QR-50VHartman Elect. QR-50VSaab Aircraft AB 340A, 340B1993-10-20current

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.