The U.S. aircraft register, updated daily
Parts

Exterior Passenger

No failure report names the exterior passenger. 2 FAA approvals let 1 company make a replacement exterior passenger, Rsg Products INC holding the most (2).

Approved replacement parts 2 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a exterior passenger and sell it as an approved part for the models named. These are the companies holding such approvals for a exterior passenger:

For these models most: Bell 412 (2).

MakerPartReplacesFitsGrantedStatus
Rsg Products INCExterior Passenger Step (Assy / INSTL) B20-13101-01B20-13101-01Bell Helicopter Textron 4122021-06-04current
Rsg Products INCExterior Passenger Step (Assy / INSTL) B20-13101-02B20-13101-02Bell Helicopter Textron 4122021-06-04current

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.