Service difficulty report · Propeller · Cessna 172S

Difficulty date
September 21, 2026
Submitted
September 22, 2026
Operation
General aviation
Aircraft
N848FG
Make and model
Cessna 172S
Aircraft serial
172S13459
Aircraft time
498 hours
Engine
Lyc IO360L2A
Engine time
498 hours
Propeller
Mcauly 1A170E
Part
Propeller
Condition
Misinstalled
Stage of operation
IN
How discovered
V
Nature of condition
W
Precautionary procedure
K

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

What was found

PROPELLER INSTALLED INCORRECTLY AT THE FACTORY, INCORRECT CLOCKING CAUSING PROPELLER BUSHINGS TO BACK OUT: THE PROPELLER CLOCKED INCORRECTLY WITH #1 CYLINDER AT TOP DEAD CENTER. THE FACTORY SAFETY CABLES SHOWING THIS PROP HASN'T BEEN REMOVED SINCE TAKING DELIVERY OF THE AIRCRAFT. TWO BUSHINGS BACKING OUT OF THE CRANK SHAFT. THEY ARE BOLTS 6 AND 3, WHICH ARE LINED UP WITH THE PROP BLADES DUE TO INCORRECT CLOCKING FROM FACTORY.

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