Parts · Engine

Bypass Switch

16 failure reports named the bypass switch in the last ten years, 64 since 1995, most often on the Boeing 737; the condition most often found was "faulty".

Reports by year

Reports by year, as a table

	reports
1995	4
1996	6
1997	5
1998	2
1999	2
2001	1
2003	1
2004	7
2007	1
2008	1
2009	4
2010	2
2011	3
2012	1
2013	2
2014	2
2015	4
2016	2
2017	3
2018	1
2019	5
2020	2
2021	1
2025	1
2026	1

Which system the reports file it under last ten years

Engine13Fuel system3

Reports by system, as a table

	reports
Engine	13
Fuel system	3

Models most often reporting it last ten years

Boeing 7378Cessna 680 Citation Sovereign and Latitude6Boeing 7671

Models most reported, as a table

	reports
Boeing 737	8
Cessna 680 Citation Sovereign and Latitude	6
Boeing 767	1

How it failed the condition found, last ten years

faulty6failed4malfunctioned3faulted1intermittent1no test1

Conditions found, as a table

	reports
faulty	6
failed	4
malfunctioned	3
faulted	1
intermittent	1
no test	1

Engines most often reporting it

CFM International CFM56-7B26/2 1CFM International CFM56 series 1General Electric CF6-80 series 1Pratt & Whitney Canada PW306D1 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.