Service difficulty report · Cylinder Head · Cessna 340A

Difficulty date
December 12, 2012
Submitted
December 12, 2012
Operation
General aviation
Aircraft
N218CF
Make and model
Cessna 340A
Aircraft serial
340A00989
Aircraft time
4,350 hours, 1 cycles
Engine
Cont TSIO520NB
Engine time
2,024 hours, 1 cycles
Part
Cylinder Head
Part number
AEC65385
Part serial
5472307
Condition
Cracked
Location
Nr 5
Part time
473 hours, 1 cycles
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

CRACKED CYLINDER HEAD, BLUE STAIN FOUND BETWEEN FINS AT THE INDUCTION PORT, CYLINDER PRESSURIZED AND AN AIR LEAK FOUND AT THE STAIN. REMOVED CYLINDER AND FOUND CRACK BETWEEN LOWER SPARK PLUG AND INTAKE VALVE. CHECKED ALL CYLINDERS BOTH ENGINES FOR STAINS. FOUND 6 OTHER CYLINDERS OUT OF 11 STAINED. PRESSURE CHECKED OTHER 6 CYLINDERS AND NO LEAKS FOUND. THIS IS A RAM 6 CONVERSION ACFT WITH 473.O HOURS ON BOTH ENGINES.

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