Parts · Landing gear

Uplock

127 failure reports named the uplock in the last ten years, 623 since 1995, most often on the Embraer EMB-145 ERJ 145; the condition most often found was "failed". 33 FAA approvals let 4 companies make a replacement uplock, Hamilton Sundstrand Corporation holding the most (13). The reports call it "uplock", "uplock assy", "uplock, nlg".

Reports by year

Reports by year, as a table

	reports
1995	9
1996	25
1997	10
1998	17
1999	15
2000	28
2001	31
2002	33
2003	35
2004	33
2005	22
2006	23
2007	19
2008	30
2009	28
2010	30
2011	25
2012	27
2013	29
2014	11
2015	16
2016	10
2017	10
2018	20
2019	16
2020	7
2021	8
2022	11
2023	5
2024	17
2025	12
2026	11

Which system the reports file it under last ten years

Landing gear125Airframe structure1Heating, ice protection and utility systems1

Reports by system, as a table

	reports
Landing gear	125
Airframe structure	1
Heating, ice protection and utility systems	1

Models most often reporting it last ten years

Embraer EMB-145 ERJ 14523Bombardier CL-600 Challenger and CRJ20Airbus A32018Airbus A31912Airbus A3009Airbus A3217Embraer EMB-505 Phenom 3007Embraer EMB-135 ERJ 135 and Legacy4Atr-Gie Avions De Trnsp Region ATR423Cessna 525 CitationJet (CJ series)3Embraer ERJ 170 E170 and E1753Cessna 560 Citation V, Ultra, Encore and Excel2

Models most reported, as a table

	reports
Embraer EMB-145 ERJ 145	23
Bombardier CL-600 Challenger and CRJ	20
Airbus A320	18
Airbus A319	12
Airbus A300	9
Airbus A321	7
Embraer EMB-505 Phenom 300	7
Embraer EMB-135 ERJ 135 and Legacy	4
Atr-Gie Avions De Trnsp Region ATR42	3
Cessna 525 CitationJet (CJ series)	3
Embraer ERJ 170 E170 and E175	3
Cessna 560 Citation V, Ultra, Encore and Excel	2

How it failed the condition found, last ten years

failed30faulted22malfunctioned16defective11faulty6inoperative6cracked4contaminated3damaged3dirty3

Conditions found, as a table

	reports
failed	30
faulted	22
malfunctioned	16
defective	11
faulty	6
inoperative	6
cracked	4
contaminated	3
damaged	3
dirty	3

Engines most often reporting it

CFM International CFM56-5B4/3 2General Electric CT7-9B 2General Electric CF34-10E5A1 1International Aero Engines V2527-A5 1

Approved replacement parts 33 parts manufacturer approvals

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

Hamilton Sundstrand Corporation 13Aviation Materials Management INC 10Aviation Materials Management, INC. 5Aviation Materials Management, INC 5

For these models most: Boeing 757 (16), Embraer ERJ 190 E190 and E195 (5), Boeing 737 (4), Bombardier CL-600 Challenger and CRJ (3), Embraer ERJ 170 E170 and E175 (1), Embraer EMB-550 Praetor 600 and Legacy 500 (1), Dassault FALCON 7 (1), Bombardier BD-700 Global Express, 5000 and 6000 (1), Airbus A340 (1), Airbus A330 (1), Airbus A321 (1), Airbus A320 (1).

Maker	Part	Replaces	Fits	Granted	Status
Hamilton Sundstrand Corporation	Uplock, Air Driven Generator 1703787	1703787	Embraer ERJ 190-400	2019-06-17	current
Hamilton Sundstrand Corporation	Uplock 1703787	1703787	Embraer ERJ 190-300	2018-03-21	current
Hamilton Sundstrand Corporation	Uplock 1703787	1703787	Embraer ERJ 190-300	2018-03-21	current
Hamilton Sundstrand Corporation	Uplock 1714297	1714297	Embraer EMB-550	2015-05-06	current
Aviation Materials Management, INC	Uplock Assy 161N5002-5	161N5002-5	Boeing 757-200 SERIES.	2015-02-12	current
Aviation Materials Management, INC	Uplock Assembly 161N5002-6	161N5002-6	Boeing 757-200 SERIES..	2015-02-12	current
Aviation Materials Management, INC	Uplock Assy 161N5002-7	161N5002-7	Boeing 757-200 SERIES, 757-200PF SERIES,...	2015-02-12	current
Aviation Materials Management, INC	Uplock Assembly 161N5002-4	161N5002-4	Boeing 757-200 SERIES, 757-200CB SERIES,...	2015-02-12	current
Aviation Materials Management, INC	Uplock 65-46146-4	65-46146-4	Boeing 737-300 Series, 737-400 Series,...	2015-02-12	current
Aviation Materials Management, INC.	Uplock Assy 161N5002-7	161N5002-7	Boeing 757-200 SERIES, 757-200PF SERIES,...	2014-09-04	current
Aviation Materials Management, INC.	Uplock Assembly 161N5002-4	161N5002-4	Boeing 757-200 SERIES, 757-200CB SERIES,...	2014-09-04	current
Aviation Materials Management, INC.	Uplock Assembly 161N5002-6	161N5002-6	Boeing 757-200 SERIES..	2014-09-04	current
Aviation Materials Management, INC.	Uplock Assy 161N5002-5	161N5002-5	Boeing 757-200 SERIES.	2014-09-04	current
Aviation Materials Management, INC.	Uplock 65-46146-4	65-46146-4	Boeing 737-300 Series, 737-400 Series,...	2014-09-04	current
Aviation Materials Management INC	Uplock Assembly 161N5002-6	161N5002-6	Boeing 757-200 SERIES..	2013-03-24	current
Aviation Materials Management INC	Uplock Assy 161N5002-7	161N5002-7	Boeing 757-200 SERIES, 757-200PF SERIES,...	2013-03-24	current
Aviation Materials Management INC	Uplock Assembly 161N5002-4	161N5002-4	Boeing 757-200 SERIES, 757-200CB SERIES,...	2013-03-24	current
Aviation Materials Management INC	Uplock Assy 161N5002-5	161N5002-5	Boeing 757-200 SERIES.	2013-03-24	current
Aviation Materials Management INC	Uplock 65-46146-4	65-46146-4	Boeing 737-300 Series, 737-400 Series,...	2013-02-27	current
Hamilton Sundstrand Corporation	Uplock, Air Driven Generator-Emergency 1703787	1703787	Embraer ERJ 190-100 IGW, ERJ 190-100 LR, ERJ...	2011-10-06	current
Hamilton Sundstrand Corporation	Uplock, Air Driven Generator - Emergency 1703787	1703787	Embraer ERJ 170-100 LR, ERJ 170-100 STD, ERJ...	2011-05-18	current
Hamilton Sundstrand Corporation	Uplock 1705679	1705679	Dassault Aviation Falcon 7X	2011-04-11	current
Aviation Materials Management INC	Uplock Assy 161N5002-5	161N5002-5	Boeing 757-200 SERIES.	2010-10-18	current
Aviation Materials Management INC	Uplock Assy 161N5002-7	161N5002-7	Boeing 757-200 SERIES, 757-200PF SERIES,...	2010-10-18	current
Aviation Materials Management INC	Uplock Assembly 161N5002-4	161N5002-4	Boeing 757-200 SERIES, 757-200CB SERIES,...	2010-10-18	current
Aviation Materials Management INC	Uplock Assembly 161N5002-6	161N5002-6	Boeing 757-200 SERIES..	2010-10-18	current
Aviation Materials Management INC	Uplock 65-46146-4	65-46146-4	Boeing 737-300 Series, 737-400 Series,...	2006-08-24	current
Hamilton Sundstrand Corporation	Uplock, Air Driven Generator - Emergency 1703787	Embraer P/N 190-03004-401	Embraer Empresa ERJ-190-100 IGW, ERJ-190-100 LR,...	2005-09-23	current
Hamilton Sundstrand Corporation	Uplock 763388A	Bombardier GL456-1601-3 TRW Lucas Aerospace BZ02201-02	Bombardier, Inc. BD-700-1A10	2000-09-18	current
Hamilton Sundstrand Corporation	Uplock 721863C	Bombardier 721863C	Bombardier, Inc. CL600-2B19 (Regional Jet Series 100)	1999-03-07	current
Hamilton Sundstrand Corporation	Uplock 721883C	Bombardier 721883C	Bombardier, Inc. CL600-2B19 (Regional Jet Series 100)	1999-02-11	current
Hamilton Sundstrand Corporation	Uplock 151245001	Airbus 151245001	Airbus A300 B2-1A, B2-1C, B2-203	1996-10-31	current
Hamilton Sundstrand Corporation	Uplock, Challenger ADG 721863B, Dwg. No. 721863...	721863B	Bombardier, Inc. CL-600-1A11, -2A12, -2B16	1987-10-18	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.