Parts · Engine

Start Valve

307 failure reports named the start valve in the last ten years, 637 since 1995, most often on the Boeing 767; the condition most often found was "failed". 3 FAA approvals let 1 company make a replacement start valve, Honeywell International INC. holding the most (3).

Reports by year

Reports by year, as a table

	reports
1995	16
1996	12
1997	9
1998	8
1999	5
2000	7
2001	10
2002	10
2003	6
2004	20
2005	7
2006	15
2007	9
2008	31
2009	32
2010	20
2011	24
2012	26
2013	27
2014	17
2015	19
2016	12
2017	24
2018	45
2019	45
2020	37
2021	37
2022	18
2023	19
2024	19
2025	33
2026	18

Which system the reports file it under last ten years

Engine306Fuel system1

Reports by system, as a table

	reports
Engine	306
Fuel system	1

Models most often reporting it last ten years

Boeing 767139Boeing 737120Airbus A32110Boeing 75710Boeing 7475Mcdonnell Douglas MD-114Airbus A3202Airbus A3302Bombardier CL-600 Challenger and CRJ2Embraer EMB-145 ERJ 1452Embraer ERJ 170 E170 and E1752Mcdonnell Douglas Aircraft Co MD-882

Models most reported, as a table

	reports
Boeing 767	139
Boeing 737	120
Airbus A321	10
Boeing 757	10
Boeing 747	5
Mcdonnell Douglas MD-11	4
Airbus A320	2
Airbus A330	2
Bombardier CL-600 Challenger and CRJ	2
Embraer EMB-145 ERJ 145	2
Embraer ERJ 170 E170 and E175	2
Mcdonnell Douglas Aircraft Co MD-88	2

How it failed the condition found, last ten years

failed76malfunctioned52faulted40inoperative38faulty32stuck13damaged7intermittent7unknown6defective5

Conditions found, as a table

	reports
failed	76
malfunctioned	52
faulted	40
inoperative	38
faulty	32
stuck	13
damaged	7
intermittent	7
unknown	6
defective	5

Engines most often reporting it

CFM International CFM56-7B27 13CFM International CFM56-7B27E 11General Electric CF6-80C2B6 9General Electric CF6-80C2B7F 9General Electric CF6-80C2B6F 6Pratt & Whitney PW2037 5Pratt & Whitney PW2040 4CFM International CFM56-7B27/B3 3Pratt & Whitney PW4060 3Pratt & Whitney PW4062 3

Approved replacement parts 3 parts manufacturer approvals

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

Honeywell International INC. 3

For these models most: Boeing 767 (3), Boeing 747 (1).

Maker	Part	Replaces	Fits	Granted	Status
Honeywell International INC.	Start Valve 979826-10	S332U232-9	The Boeing Company 767-300 Series	2023-02-22	current
Honeywell International INC.	Start Valve 979826-9	S332U232-8	The Boeing Company 767-300 Series	2023-02-22	current
Honeywell International INC.	Start Valve 979858-2	S332T002-8	The Boeing Company 747-400 Series, 767-300 Series	2023-02-16	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.