The U.S. aircraft register, updated daily
Parts

Auxiliary Wing

No failure report names the auxiliary wing. 1 FAA approvals let 1 company make a replacement auxiliary wing, Met-Co-Aire 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 auxiliary wing and sell it as an approved part for the models named. These are the companies holding such approvals for a auxiliary wing:

For these models most: Piper PA-23 Apache and Aztec (1).

MakerPartReplacesFitsGrantedStatus
Met-Co-AireAuxiliary Wing Tip Fuel Tank 11055Modification PartPiper PA-23, PA-23-160, PA-23-2352002-11-06current

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.