Parts · Engine

Stand Off

189 failure reports named the stand off in the last ten years, 264 since 1998, most often on the Bombardier CL-600 Challenger and CRJ; the condition most often found was "cracked". 10 FAA approvals let 7 companies make a replacement stand off, Aar Pma Products holding the most (3). The reports call it "stand off", "stand-off".

Reports by year

Reports by year, as a table

	reports
1998	1
2004	1
2006	1
2007	1
2009	5
2010	4
2011	24
2012	4
2013	22
2014	5
2015	7
2016	7
2017	8
2018	5
2019	3
2020	10
2021	6
2022	5
2023	6
2024	58
2025	61
2026	20

Which system the reports file it under last ten years

Engine125Airframe structure63Heating, ice protection and utility systems1

Reports by system, as a table

	reports
Engine	125
Airframe structure	63
Heating, ice protection and utility systems	1

Models most often reporting it last ten years

Bombardier CL-600 Challenger and CRJ157Boeing 73711Embraer ERJ 170 E170 and E1757Boeing 7473Boeing 7673Embraer EMB-505 Phenom 3003Embraer EMB-145 ERJ 1452Aerospatiale/Aeritalia ATR 421Airbus A3001Mcdonnell Douglas Aircraft Co MD-881

Models most reported, as a table

	reports
Bombardier CL-600 Challenger and CRJ	157
Boeing 737	11
Embraer ERJ 170 E170 and E175	7
Boeing 747	3
Boeing 767	3
Embraer EMB-505 Phenom 300	3
Embraer EMB-145 ERJ 145	2
Aerospatiale/Aeritalia ATR 42	1
Airbus A300	1
Mcdonnell Douglas Aircraft Co MD-88	1

How it failed the condition found, last ten years

cracked157corroded15broken7bent5damaged2debonded1loose1unsecure1

Conditions found, as a table

	reports
cracked	157
corroded	15
broken	7
bent	5
damaged	2
debonded	1
loose	1
unsecure	1

Engines most often reporting it

General Electric CF34-8C1 2General Electric CF34-8C5B1 1General Electric CF34 series 1

Approved replacement parts 10 parts manufacturer approvals

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

Aar Pma Products 3Wencor LLC (Formerly Dixie Aerospace LLC) 2Rsg Products INC 1Pats Aircraft LLC 1Keystone Helicopter Corporation 1Exotic Metals Forming Company LLC 1Dayton Granger INC 1

For these models most: Boeing 777 (5), Sikorsky S-76 (1), North American NA-265 (1), Boeing 747 (1), Bell 412 (1).

Maker	Part	Replaces	Fits	Granted	Status
Rsg Products INC	Stand Off 04BL229200027-01	04BL229200027-01	Bell 412EP	2020-10-07	current
Pats Aircraft LLC	Stand-off Assembly 401-5-721-9	401-5-721-9	Fokker F28MK0100 limited to serial numbers...	2013-08-15	current
Wencor LLC (Formerly Dixie Aerospace LLC)	Stand Off Assembly AR453W0350-11	Boeing 453W0350-11	Boeing 777-200 series, 777-300 series	2011-06-20	current
Wencor LLC (Formerly Dixie Aerospace LLC)	Stand Off Assembly AR453W0350-9	Boeing 453W0350-9	Boeing 777-200 series, 777-300 series	2011-06-20	current
Exotic Metals Forming Company LLC	STAND OFF 69B40999-1	69B40999-1	BOEING 747-100 SERIES, 747-100B SERIES,...	2007-07-10	current
Aar Pma Products	Stand Off Assembly 453W0350-9	AR453W0350-9	Boeing 777-200 Series, 777-300 Series	2005-10-11	current
Aar Pma Products	Stand Off Assembly AR453W0350-9	453W0350-9	Boeing 777-200 Series, 777-300 Series	2005-10-11	current
Aar Pma Products	Stand Off Assembly AR453W0350-11	453W0350-11	Boeing 777-200 Series, 777-300 Series	2005-10-10	current
Keystone Helicopter Corporation	Stand Off 9DP-12-0025	Modification Part	Sikorsky S76A, B, C	2004-06-21	current
Dayton Granger INC	Stand-off Mast 27 30ARM300-79A	Modification Part	Sabreliner NA-265-70, NA-265-80	1995-07-23	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.