Service difficulty report · Servo · Cessna 172S

Difficulty date
February 28, 2016
Submitted
April 22, 2016
Operation
General aviation
Make and model
Cessna 172S
Aircraft time
4,243 hours
Engine
Lyc IO360L2A
Part
Servo
Part number
25765362
Condition
Malfunctioned
Location
Fuel System
Stage of operation
LD
How discovered
O
Nature of condition
Y, J
Precautionary procedure
A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

(CAN) AIRCRAFT WAS CARRYING OUT CIRCUITS (TOUCH AND GO) AT VERNON AIRPORT. FOLLOWING A NORMAL POWER OFF APPROACH AND TOUCHDOWN POWER WAS APPLIED FOR TAKE OFF BUT THE ENGINE DIED AND THE AIRCRAFT COASTED TO A STOP ON THE RUNWAY. WHEN CLEAR OF THE RUNWAY AN ATTEMPT WAS MADE TO START THE ENGINE BUT IT WOULD NOT START AND FUEL WAS OBSERVED DRIPPING FROM THE AIR INTAKE. AFTER INVESTIGATION IT WAS SUSPECTED THE FUEL SERVO WAS DELIVERING EXCESS FUEL WHICH CAUSED THE ENGINE TO FLOOD AND RICH CUT AT LOW REVS. FUEL SERVO WAS REPLACED AND THE AIRCRAFT WAS STARTED AND RUN WITH NO PROBLEMS, IT HAS BEEN FLYING FOR 7 DAYS WITH NO FURTHER PROBLEMS.

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