Parts · Airframe structure

Torsion Bar

13 failure reports named the torsion bar in the last ten years, 32 since 1996, most often on the Mcdonnell Douglas Aircraft Co MD-88; the condition most often found was "corroded". 3 FAA approvals let 3 companies make a replacement torsion bar, Seal Dynamics INC holding the most (1).

Reports by year

Reports by year, as a table

	reports
1996	1
1997	2
1998	3
1999	2
2003	3
2004	1
2008	1
2011	1
2013	4
2015	1
2016	5
2018	4
2019	1
2020	1
2022	1
2026	1

Which system the reports file it under last ten years

Airframe structure13

Reports by system, as a table

	reports
Airframe structure	13

Models most often reporting it last ten years

Mcdonnell Douglas Aircraft Co MD-888Airbus A3191Airbus A3201Airbus A3501Embraer EMB-145 ERJ 1451Embraer EMB-505 Phenom 3001

Models most reported, as a table

	reports
Mcdonnell Douglas Aircraft Co MD-88	8
Airbus A319	1
Airbus A320	1
Airbus A350	1
Embraer EMB-145 ERJ 145	1
Embraer EMB-505 Phenom 300	1

How it failed the condition found, last ten years

corroded8out of adjust2bent1cracked1damaged1

Conditions found, as a table

	reports
corroded	8
out of adjust	2
bent	1
cracked	1
damaged	1

Approved replacement parts 3 parts manufacturer approvals

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

Seal Dynamics INC 1Lord Corporation, Mechanical Products Division 1Lord Corporation 1

For these models most: Airbus Helicopters SA341 (2), Aerospatiale SA342 (2), Embraer EMB-145 ERJ 145 (1), Embraer EMB-135 ERJ 135 and Legacy (1).

Maker	Part	Replaces	Fits	Granted	Status
Seal Dynamics INC	Torsion Bar 145-36994-001SD	Embraer P/N 145-36994-001	Embraer EMB135 Series, EMB145 Series	2010-01-31	current
Lord Corporation	Torsion Bar J-23750-1	704A33633274	Eurocopter SA341, SA342, SA360	2009-11-24	current
Lord Corporation, Mechanical Products Division	Torsion Bar J-23750-1	704A33633274	Eurocopter SA341, SA342, SA360	2009-11-24	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.