The U.S. aircraft register, updated daily
Parts

Switch Auxiliary

No failure report names the switch auxiliary. 1 FAA approvals let 1 company make a replacement switch auxiliary, Mason Electric CO 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 switch auxiliary and sell it as an approved part for the models named. These are the companies holding such approvals for a switch auxiliary:

For these models most: Mcdonnell Douglas DC-9 (1).

MakerPartReplacesFitsGrantedStatus
Mason Electric COSwitch Auxiliary Trim 561349McDonnell Douglas 561349McDonnell Douglas DC-91995-05-10current

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.