Bcu

1 failure reports named the bcu in the last ten years, 1 since 2026, most often on the Embraer ERJ 170 E170 and E175; the condition most often found was "faulted". 1 FAA approvals let 1 company make a replacement bcu, Hamilton Sundstrand Corporation holding the most (1).

Reports by year

Reports by year, as a table

	reports
2026	1

Which system the reports file it under last ten years

Landing gear1

Reports by system, as a table

	reports
Landing gear	1

Models most often reporting it last ten years

Embraer ERJ 170 E170 and E1751

Models most reported, as a table

	reports
Embraer ERJ 170 E170 and E175	1

How it failed the condition found, last ten years

faulted1

Conditions found, as a table

	reports
faulted	1

Approved replacement parts 1 parts manufacturer approvals

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

Hamilton Sundstrand Corporation 1

For these models most: Boeing 747 (1).

Maker	Part	Replaces	Fits	Granted	Status
Hamilton Sundstrand Corporation	BCU, Bus Control Unit 746013J	Boeing 60B40162-11	Boeing 747-400	1997-03-04	current

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.