The U.S. aircraft register, updated daily
Parts

Unicaster

No failure report names the unicaster. 4 FAA approvals let 2 companies make a replacement unicaster, Advanced Aircraft Roller Systems INC holding the most (3).

Approved replacement parts 4 parts manufacturer approvals

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

For these models most: Boeing 777 (2), Boeing 747 (2).

MakerPartReplacesFitsGrantedStatus
Advanced Aircraft Roller Systems INCUnicaster Assembly RKA-7M32502-37M32502-3Boeing 747-400 Series2018-04-18current
Advanced Aircraft Roller Systems INCUnicaster Assembly RKA-77FM200-177FM200-1Boeing 777F Series2017-10-04current
Advanced Aircraft Roller Systems INCUnicaster Assembly RKA-7M3W050-17M3W050-1Boeing 777F Series2017-05-26current
Goodrich CorporationUnicaster Assembly 7M32502-2Boeing S457U100-1Boeing 747-400F Series2003-09-04current

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.