The U.S. aircraft register, updated daily
Parts

Vent Boss

No failure report names the vent boss. 1 FAA approvals let 1 company make a replacement vent boss, Major Component Supply 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 vent boss and sell it as an approved part for the models named. These are the companies holding such approvals for a vent boss:

MakerPartReplacesFitsGrantedStatus
Major Component SupplyVent Boss MCS1755-115A1755-115Allied AgCat... G164A, B, C2013-04-09current

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.