The U.S. aircraft register, updated daily
Parts

Cap Track

No failure report names the cap track. 1 FAA approvals let 1 company make a replacement cap track, Aerostar Engineering 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 cap track and sell it as an approved part for the models named. These are the companies holding such approvals for a cap track:

For these models most: Boeing 767 (1), Boeing 757 (1), Boeing 747 (1), Boeing 737 (1).

MakerPartReplacesFitsGrantedStatus
Aerostar Engineering INCCap-Track AE69B50620Boeing 69B50620Boeing 737, 747, 7571992-06-08current

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.