The U.S. aircraft register, updated daily
Parts

Controller Amplifier

No failure report names the controller amplifier. 8 FAA approvals let 1 company make a replacement controller amplifier, Sigma Tek INC holding the most (8).

Approved replacement parts 8 parts manufacturer approvals

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

For these models most: Cessna 210 Centurion (5), Cessna 337 Skymaster (4), Cessna U206 Stationair (3), Cessna 206 Stationair (3), Cessna 182 Skylane (3), Cessna 177 Cardinal (3), Cessna TU206 (2), Cessna TP206 (2), Cessna P337 (2), Cessna P206 Super Skylane (2), Cessna T210 Turbo Centurion (1), Cessna 336 (1).

MakerPartReplacesFitsGrantedStatus
Sigma Tek INCController Amplifier 40850-1128Cessna 40850-1128Cessna 210, 337, P3371996-08-04current
Sigma Tek INCController Amplifier 35660-1114Cessna 35660-1114Cessna 177RG, 182, 2061996-08-04current
Sigma Tek INCController Amplifier 28870-1228Cessna 28870-1228Cessna 336, 3371996-08-04current
Sigma Tek INCController Amplifier 28870-1214Cessna 28870-1214Cessna 210, 206, P2061996-08-04current
Sigma Tek INCController Amplifier 40850-1114Cessna 40850-1114Cessna 177RG, 182, U2061996-08-04current
Sigma Tek INCController Amplifier 35660-1028Cessna 35660-1028Cessna 3371996-08-04current
Sigma Tek INCController Amplifier 35660-1128Cessna 35660-1128Cessna 337, P337, FP3371996-08-04current
Sigma Tek INCController Amplifier 35660-1014Cessna 35660-1014Cessna 177RG, 182, P2061996-08-04current

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.