Parts · Heating, ice protection and utility systems

Tmu

3 failure reports named the tmu in the last ten years, 10 since 2003, most often on the Bombardier DHC-8 Dash 8 and Q400; the condition most often found was "inoperative". 1 FAA approvals let 1 company make a replacement tmu, Rockwell Collins INC holding the most (1).

Reports by year

Reports by year, as a table

	reports
2003	1
2007	4
2012	2
2019	2
2020	1

Which system the reports file it under last ten years

Heating, ice protection and utility systems3

Reports by system, as a table

	reports
Heating, ice protection and utility systems	3

Models most often reporting it last ten years

Bombardier DHC-8 Dash 8 and Q4003

Models most reported, as a table

	reports
Bombardier DHC-8 Dash 8 and Q400	3

How it failed the condition found, last ten years

inoperative2malfunctioned1

Conditions found, as a table

	reports
inoperative	2
malfunctioned	1

Approved replacement parts 1 parts manufacturer approvals

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

Rockwell Collins INC 1

For these models most: Gulfstream G-IV Gulfstream IV (1).

Maker	Part	Replaces	Fits	Granted	Status
Rockwell Collins INC	TMU 932001-100	932001-100	Gulfstream G-IV	2016-06-01	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.