Service difficulty report · Engine · Cessna 414A

Difficulty date
September 27, 2013
Submitted
October 25, 2013
Operation
General aviation
Aircraft
N414WR
Make and model
Cessna 414A
Aircraft serial
414A0247
Engine
Cont TSIO520NB
Part
Engine
Condition
Damaged
Location
Left
Part time
396 hours
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

DURING A VISUAL INSPECTION ON RT ENGINE, FOUND FUEL STAIN ON NR 3 INTAKE TUBE. TRACED FUEL LEAK TO CRACK IN NR 3 CYLINDER. ON FURTHER INSPECTION, FOUND VISIBLE FUEL STAIN AND CRACK IN NR 2 CYLINDER. PERFORMED COMPRESSION CHECK ON RT ENGINE. NR 1 INTAKE LEAK, NR 2 INTAKE LEAK, NR 3 OK. NR 4 RING LEAKAGE. NR 5 OK. NR 6 INTAKE LEAK. PERFORMED COMPRESSION CHECK ON LT ENGINE. NR 1 INTAKE LEAK. NR 2 INTAKE LEAK. NR 3 OK. NR 4 OK. NR 5 RING LEAKAGE. NR 6 INTAKE LEAK. REMOVED ALL CYLINDERS FROM BOTH ENGINES. RT ENGINE DISCREPANCIES: NR 1 VALVE SPRING MISALIGNMENT, NR 2 CRACK IN CYLINDER AND VALVE SPRING MISALIGNMENT, NR 3 CRACK IN CYLINDER, BROKEN OUTER INTAKE VALVE SPRING, AND VALVE SPRING MISALIGNMENT, NR 4 VALVE SPRING MISALIGNMENT, NR 5 VALVE SPRING MISALIGNMENT, NR 6 VALVE SPRING MISALIGNMENT. LT ENGINE DISCREPANCIES: NR 1 BROKEN EXHAUST VALVE INNER SPRING AND VALVE SPRING MISALIGNMENT, NR 2 VALVE SPRING MISALIGNMENT, NR 3 VALVE SPRING MISALIGNMENT, NR 4 VALVE SPRING MISALIGNMENT, NR 5 CRACK IN SYLINDER AND VALVE SPRING MISALIGNMENT, NR 6 VALVE SPRING MISALIGNMENT. CYL SN: LT ENG: NR1-48409-10, NR 2-48651-20, NR 3-48651-16, NR 4 48651-01, NR 5 48577-09, NR 6-48516-24. RT ENG: NR1-49540-05, NR 2-49793-25, NR 3 49685-10, NR 4-49786-04, NR 5-49540-03, NR 6 49786-03.

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