The U.S. aircraft register, updated daily
Parts

Trimmable Collar

No failure report names the trimmable collar. 1 FAA approvals let 1 company make a replacement trimmable collar, Aerospace Technologies Group 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 trimmable collar and sell it as an approved part for the models named. These are the companies holding such approvals for a trimmable collar:

For these models most: Boeing 787 Dreamliner (1).

MakerPartReplacesFitsGrantedStatus
Aerospace Technologies GroupTrimmable Collar ATG35C017Modification PartBoeing 787-82021-09-28current

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.