The U.S. aircraft register, updated daily
Parts

Controller Unit

0 failure reports named the controller unit in the last ten years, 1 since 1995. 5 FAA approvals let 4 companies make a replacement controller unit, Lockheed Martin, Electro-Optical Systems holding the most (2).

Reports by year

0001111995
Reports by year, as a table
reports
19951

Approved replacement parts 5 parts manufacturer approvals

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

For these models most: Boeing 747 (5).

MakerPartReplacesFitsGrantedStatus
Bae SystemsController Unit 2011643-12011643-1Boeing 747-428 S/N 256292012-06-05current
Bae Systems INCController Unit 2011643-12011643-1Boeing 747-428 S/N 256292012-06-05current
Lockheed Martin, Electro-Optical SystemsController Unit 2013207-1 B/-/-Boeing 2013207-1 B/-/-Boeing 747-2G4B S/Ns 23824, 238251999-01-31current
Lockheed Martin, Electro-Optical SystemsController Unit 2011643Modification PartBoeing 747-428, -4301996-06-13current
Loral Electro-Optical SysController Unit 2011643Modification PartBoeing 747-428, 747-4301995-11-13current

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.