Parts · Flight controls

Bpsu

78 failure reports named the bpsu in the last ten years, 821 since 1995, most often on the Bombardier CL-600 Challenger and CRJ; the condition most often found was "failed".

Reports by year

Reports by year, as a table

	reports
1995	19
1996	12
1997	17
1998	28
1999	60
2000	63
2001	48
2002	50
2003	30
2004	41
2005	72
2006	55
2007	44
2008	47
2009	23
2010	26
2011	40
2012	29
2013	18
2014	11
2015	10
2016	16
2017	9
2018	15
2019	9
2020	11
2021	7
2023	2
2024	7
2025	1
2026	1

Which system the reports file it under last ten years

Flight controls77Electrical power1

Reports by system, as a table

	reports
Flight controls	77
Electrical power	1

Models most often reporting it last ten years

Bombardier CL-600 Challenger and CRJ77Boeing 787 Dreamliner1

Models most reported, as a table

	reports
Bombardier CL-600 Challenger and CRJ	77
Boeing 787 Dreamliner	1

How it failed the condition found, last ten years

failed31malfunctioned16inoperative15faulted7out of rig3faulty2warning message2unknown1unserviceable1

Conditions found, as a table

	reports
failed	31
malfunctioned	16
inoperative	15
faulted	7
out of rig	3
faulty	2
warning message	2
unknown	1
unserviceable	1

Engines most often reporting it

General Electric CF34-3B1 2General Electric CF34-3A1 1General Electric CF34-8C5 1

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.