The U.S. aircraft register, updated daily
Parts

Hub Adapter

No failure report names the hub adapter. 3 FAA approvals let 1 company make a replacement hub adapter, Aerocess, INC holding the most (3).

Approved replacement parts 3 parts manufacturer approvals

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

MakerPartReplacesFitsGrantedStatus
Aerocess, INCHub Adapter ACA-4424A-4424McCauley Propeller Systems 2D34C, B2D34C, 2A34C2024-04-23current
Aerocess, INCHub Adapter ACB-6378B-6378McCauley Propeller Systems D2A34C, F2A34C, B2A34C2024-04-23current
Aerocess, INCHub Adapter ACA-3267A-3267McCauley Propeller Systems 2AF31C10, 2AF34C55, D2AF34C2024-04-23current

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.