The U.S. aircraft register, updated daily
Parts

Transition Air

No failure report names the transition air. 1 FAA approvals let 1 company make a replacement transition air, K-Aero INC 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 transition air and sell it as an approved part for the models named. These are the companies holding such approvals for a transition air:

MakerPartReplacesFitsGrantedStatus
K-Aero INCTransition Air Induction Box KA-124ModificationTextron Lycoming O-540-E4A51999-08-19current

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.