Parts · Cabin, seats and restraints

Isolation Mount

33 failure reports named the isolation mount in the last ten years, 82 since 1995, most often on the Boeing 737; the condition most often found was "cracked". 5 FAA approvals let 2 companies make a replacement isolation mount, North American Surveillance Systems INC holding the most (3).

Reports by year

Reports by year, as a table

	reports
1995	6
1996	6
1997	2
1998	3
1999	2
2002	9
2003	10
2004	1
2005	3
2009	1
2010	1
2011	3
2012	1
2013	1
2019	1
2020	1
2021	2
2022	1
2023	2
2024	13
2025	6
2026	7

Which system the reports file it under last ten years

Cabin, seats and restraints16Airframe structure10Engine7

Reports by system, as a table

	reports
Cabin, seats and restraints	16
Airframe structure	10
Engine	7

Models most often reporting it last ten years

Boeing 73725Boeing 7673Boeing 7571Cessna 1401Cirrus SR221Piper PA-28 Cherokee, Warrior, Archer and Arrow1Piper PA-31 Navajo and Chieftain1

Models most reported, as a table

	reports
Boeing 737	25
Boeing 767	3
Boeing 757	1
Cessna 140	1
Cirrus SR22	1
Piper PA-28 Cherokee, Warrior, Archer and Arrow	1
Piper PA-31 Navajo and Chieftain	1

How it failed the condition found, last ten years

cracked17deteriorated4broken3worn3damaged2debonded1distressed1out of limits1torn1

Conditions found, as a table

	reports
cracked	17
deteriorated	4
broken	3
worn	3
damaged	2
debonded	1
distressed	1
out of limits	1
torn	1

Engines most often reporting it

Lycoming TIO-540-J2BD 1

Approved replacement parts 5 parts manufacturer approvals

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

North American Surveillance Systems INC 3Elmo Air Center INC 2

For these models most: Airbus Helicopters AS350 AStar (Écureuil), now H125 (3), Bell 407 (2).

Maker	Part	Replaces	Fits	Granted	Status
North American Surveillance Systems INC	Isolation Mount Base Plate 0304	Modification Part	Bell Helicopter Textron 407	2010-11-25	current
North American Surveillance Systems INC	Isolation Mount UM2 UM20305	Modification Part	Eurocopter France AS-350D, AS-350B, AS-350B1	2010-11-25	current
North American Surveillance Systems INC	Isolation Mount Ring 0112-2	Modification Part	Bell Helicopter Textron 407	2010-11-25	current
Elmo Air Center INC	Isolation Mount 350UM0030	Modification Part	Eurocopter France AS-350D, AS-350B, AS-350B1	1998-07-08	current
Elmo Air Center INC	Isolation Mount Assembly-UM2 374UM20010	Modification Part	Eurocopter France AS-350D, AS-350B, AS-350B1	1998-07-08	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.