The U.S. aircraft register, updated daily
Parts

Rotomaster Controller

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

For these models most: Piper PA-60 Aerostar (1).

MakerPartReplacesFitsGrantedStatus
Machen INCRotomaster Controller 250002-003, -005, & -006Piper 250002-03, -05 & -06Aerostar Aircraft PA-60-601, -601P, -602P & -700P1999-02-18current

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.