Sensing Element

42 failure reports named the sensing element in the last ten years, 165 since 1995, most often on the Bombardier CL-600 Challenger and CRJ; the condition most often found was "faulted". 9 FAA approvals let 3 companies make a replacement sensing element, Fenwal Safety Systems holding the most (6).

Reports by year

Reports by year, as a table

	reports
1995	2
1996	2
1997	4
1998	1
1999	1
2000	3
2001	11
2002	7
2003	3
2004	4
2005	4
2006	5
2007	5
2008	8
2009	5
2010	17
2011	17
2012	10
2013	5
2014	7
2015	2
2016	6
2017	6
2018	4
2019	7
2020	3
2022	3
2024	5
2025	4
2026	4

Which system the reports file it under last ten years

Emergency equipment22Heating, ice protection and utility systems16Electrical power1Engine1Fuel system1Airframe structure1

Reports by system, as a table

	reports
Emergency equipment	22
Heating, ice protection and utility systems	16
Electrical power	1
Engine	1
Fuel system	1
Airframe structure	1

Models most often reporting it last ten years

Models most reported, as a table

	reports
Bombardier CL-600 Challenger and CRJ	10
Boeing 737	9
Airbus A320	4
Airbus A321	2
Bombardier BD-100 Challenger 300 and 350	2
Mcdonnell Douglas MD-11	2
Aerospatiale ATR 72	1
Airbus A300	1
Airbus A330	1
Beechcraft C-99	1
Boeing 747	1
Boeing 757	1

How it failed the condition found, last ten years

faulted10faulty8failed7shorted5defective3out of position3false indication1indication1inoperative1malfunctioned1

Conditions found, as a table

	reports
faulted	10
faulty	8
failed	7
shorted	5
defective	3
out of position	3
false indication	1
indication	1
inoperative	1
malfunctioned	1

Engines most often reporting it

CFM International CFM56-7B27 1 Garrett (Honeywell) TFE731-2-2B 1 General Electric CF34-3B1 1 General Electric CT7-9B 1 Honeywell TFE731-20BR 1 Pratt & Whitney PT6A series 1 Pratt & Whitney PW4460 1

Approved replacement parts 9 parts manufacturer approvals

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

Fenwal Safety Systems 6 Kidde Aerospace 2 Ge Aviation Systems LLC (Formerly Smiths and Barbar Coleman) 1

For these models most: Boeing 737 (6), Mcdonnell Douglas DC-9 (1), Boeing 727 (1).

Maker	Part	Replaces	Fits	Granted	Status
Fenwal Safety Systems	Sensing Element, 310D/F 35712-75	35712-75	Boeing 737-600 Series, 737-700 Series,...	2004-09-28	current
Fenwal Safety Systems	Sensing Element, 255D/F 35712-80	35712-80	Boeing 737-600 Series, 737-700 Series,...	2004-09-28	current
Fenwal Safety Systems	Sensing Element, 310D/F 35712-79	35712-79	Boeing 737-600 Series, 737-700 Series,...	2004-09-28	current
Fenwal Safety Systems	Sensing Element 310 D/F 35712-75	Boeing 35712-75	Boeing 737-600 series, 737-700 series,...	1998-10-04	current
Fenwal Safety Systems	Sensing Element 225 D/F 37512-80	Boeing 35712-80	Boeing 737-700 series, 737-800 series	1998-10-04	current
Fenwal Safety Systems	Sensing Element 255 D/F 35712-80	Boeing 35712-80	Boeing 737-700 series, 737-800 series,...	1998-10-04	current
Kidde Aerospace	Sensing Element, Kidde Continuous Fire Detector 898400	OEM 898400	McDonnell Douglas DC-9-80	1996-06-04	current
Kidde Aerospace	Sensing Element 894232	Boeing 10-61096-27	Boeing 727-200	1992-08-18	current
Ge Aviation Systems LLC (Formerly Smiths and Barbar Coleman)	Sensing Element AYLF-50425 Dwg. AYLF-50425...	Original Part	Dassault Aviation Dassault-Breguet Mystere-Falcon 50, 900	1987-08-23	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.