The U.S. aircraft register, updated daily
Parts

Rotary Flap

No failure report names the rotary flap. 2 FAA approvals let 1 company make a replacement rotary flap, Moog Aircraft Group 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 rotary flap and sell it as an approved part for the models named. These are the companies holding such approvals for a rotary flap:

For these models most: Boeing 747 (2).

MakerPartReplacesFitsGrantedStatus
Moog Aircraft GroupRotary Flap Actuator 2021858-5Boeing 60B80092-10Boeing 747-SP1996-02-28current
Moog Aircraft GroupRotary Flap Actuator 2021858-4Boeing 60B80092-8Boeing 747-SP1996-02-28current

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.