The U.S. aircraft register, updated daily
Parts

Hubcap Mlg

No failure report names the hubcap mlg. 2 FAA approvals let 1 company make a replacement hubcap mlg, Aviation Technical Services 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 hubcap mlg and sell it as an approved part for the models named. These are the companies holding such approvals for a hubcap mlg:

For these models most: Boeing 737 (2).

MakerPartReplacesFitsGrantedStatus
Aviation Technical ServicesHubcap – MLG INBD Wheel 277A6110-3ATSPMA277A6110-3The Boeing Company 737-900 Series, 737-900ER Series, 737-92026-07-02current
Aviation Technical ServicesHubcap – MLG INBD Wheel 277A6110-3ATSPMA277A6110-3 The Boeing Company 737-700 Series, 737-800 Series, 737-8 Series2025-10-01current

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.