Servo Motor

16 failure reports named the servo motor in the last ten years, 28 since 1995, most often on the Boeing 737; the condition most often found was "faulted". 2 FAA approvals let 2 companies make a replacement servo motor, Woodward Mpc holding the most (1).

Reports by year

Reports by year, as a table

	reports
1995	3
1997	3
1998	5
1999	1
2017	3
2018	1
2019	7
2020	1
2023	2
2024	1
2025	1

Which system the reports file it under last ten years

Flight controls14Engine1Landing gear1

Reports by system, as a table

	reports
Flight controls	14
Engine	1
Landing gear	1

Models most often reporting it last ten years

Boeing 73714Boeing 7671Learjet 351

Models most reported, as a table

	reports
Boeing 737	14
Boeing 767	1
Learjet 35	1

How it failed the condition found, last ten years

faulted8failed2faulty2intermittent2inoperative1shorted1

Conditions found, as a table

	reports
faulted	8
failed	2
faulty	2
intermittent	2
inoperative	1
shorted	1

Engines most often reporting it

CFM International CFM56-7B27E 1

Approved replacement parts 2 parts manufacturer approvals

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

Woodward Mpc 1 Vickers INC, Electromech Division 1

For these models most: Boeing 747 (2).

Maker	Part	Replaces	Fits	Granted	Status
Woodward Mpc	Servo Motor P76201A	S253U001-2	Boeing 747-8F Series	2011-10-09	current
Vickers INC, Electromech Division	Servo Motor 6013L0001-01	Boeing 60B80031-10	Boeing 747-100, 200	1996-09-30	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.