The U.S. aircraft register, updated daily
Parts

Master Nag

No failure report names the master nag. 1 FAA approvals let 1 company make a replacement master nag, Gosman Aircraft 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 master nag and sell it as an approved part for the models named. These are the companies holding such approvals for a master nag:

MakerPartReplacesFitsGrantedStatus
Gosman AircraftMaster Nag Warning System VMPModification PartTiger Aircraft AA-5A1992-09-17current

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.