Service difficulty report · Carburetor · Cessna 172S

Difficulty date
March 31, 2003
Submitted
March 31, 2003
Operation
General aviation
Aircraft
N418ER
Make and model
Cessna 172S
Aircraft serial
172S8650
Aircraft time
2,237 hours
Engine
Lyc IO360L2A
Engine time
2,377 hours
Part
Carburetor
Part number
25765362
Condition
Inaccurate
Location
Engine
Stage of operation
TX
How discovered
C
Nature of condition
R
Precautionary procedure
D

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

What was found

DURING PRE TAKEOFF RUN, THE IDLE SPEED WOULD DROP TO ABOUT 500 RPM WHEN THE THROTTLE WAS REDUCED TO THE STOP. THIS ENGINE FUEL CONTROL COMBINATION REQUIRES SUBSTANTIAL ADJUSTMENT TO MAINTAIN THE CORRECT IDLE SPEED/MIXTURE.

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