Uplock Switch

119 failure reports named the uplock switch in the last ten years, 647 since 1995, most often on the Cessna 680 Citation Sovereign and Latitude; the condition most often found was "defective". 1 FAA approvals let 1 company make a replacement uplock switch, Aviation Technologies INC holding the most (1).

Reports by year

Reports by year, as a table

	reports
1995	36
1996	40
1997	34
1998	4
1999	1
2000	23
2001	18
2002	14
2003	30
2004	28
2005	38
2006	20
2007	37
2008	31
2009	30
2010	24
2011	31
2012	22
2013	30
2014	24
2015	13
2016	8
2017	11
2018	9
2019	10
2020	10
2021	5
2022	10
2023	8
2024	9
2025	23
2026	16

Which system the reports file it under last ten years

Landing gear119

Reports by system, as a table

	reports
Landing gear	119

Models most often reporting it last ten years

Models most reported, as a table

	reports
Cessna 680 Citation Sovereign and Latitude	73
Cessna 560 Citation V, Ultra, Encore and Excel	18
Saab-Fairchild 340	8
Beechcraft 300 King Air 300	2
Beechcraft B200 King Air B200	2
Cessna 525 CitationJet (CJ series)	2
Airbus A300	1
Airbus A319	1
Airbus A320	1
Beechcraft 1900 Airliner	1
Cessna 750 Citation X	1
Embraer EMB-145 ERJ 145	1

How it failed the condition found, last ten years

defective27failed23faulted20out of adjust16faulty8malfunctioned5false indication3out of rig3damaged2inoperative2

Conditions found, as a table

	reports
defective	27
failed	23
faulted	20
out of adjust	16
faulty	8
malfunctioned	5
false indication	3
out of rig	3
damaged	2
inoperative	2

Engines most often reporting it

General Electric CT7-9B 6 Honeywell TFE731-20 1

Approved replacement parts 1 parts manufacturer approvals

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

Aviation Technologies INC 1

For these models most: Short Bros SD3 (1).

Maker	Part	Replaces	Fits	Granted	Status
Aviation Technologies INC	Uplock Switch 402HE2-12B	Modification Part	Short Brothers SD3-60	1994-02-13	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.