Service difficulty report · Stud · Cessna 172N

Difficulty date
December 22, 2011
Submitted
September 14, 2015
Operation
General aviation
Make and model
Cessna 172N
Aircraft time
1,821 hours
Engine
Lyc O320H2AD
Propeller
Mcauly 1C160CTM
Part
Stud
Part number
3116
Condition
Broken
Location
Intake Valve
Part time
2,058 hours
Stage of operation
CR
How discovered
O
Nature of condition
R
Precautionary procedure
A

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

What was found

(CAN) ENGINE HAD A SUDDEN LOSS OF POWER. ACFT DIVERTED & LANDED SAFELY. UPON INSPECTION THE ENGINE NR 2 CYLINDER INTAKE VALVE RETAINING STUD WAS FOUND BROKEN. CYLINDER INTERIOR INSPECTED W/BOROSCOPE & NO FAULTS FOUND. CYLINDER VALVE DRIVE TRAIN INSPECTED & NO FURTHER DAMAGE FOUND. STUD R & R. VALVE CLEARANCE SET, GROUND RUNS C/O FOR LEAK & FUNCTION, NO FAULT FOUND.

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