Service difficulty report · Cylinder · Beech 58

Difficulty date
August 9, 2006
Submitted
August 16, 2006
Operation
General aviation
Aircraft
N58LF
Make and model
Beech 58
Aircraft serial
TH237
Engine
Cont IO520*
Part
Cylinder
Condition
Damaged
Location
Engine
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

ON ANNUAL INSPECTION, WORK WAS BEING PERFORMED TO REPAIR OIL LEAK ON PUSH ROD TUBE SEALS, WHEN PUSHRODS WERE REMOVED, THEY WERE FOUND TO BE BENT AND GREATER THAN 50 PERCENT OF TOTAL TUBE WORN THROUGH. FURTHER INVESTIGATION FOUND THAT SEVERAL TUBES WERE FOUND IN SAME CODITION AND THAT ALL EXHAUST RODS WERE BENT. THERE WERE ALSO SIGNS ON 5 PISTONS OF VALVE CONTACT. FIREWALL FWD RECONDITIONED CYLINDERS AND STATED THAT VALVE GUIDES HAD COAKING ON THEM AND THAT THE PISTON RINGS HAD LOST THEIR TEMPER. OWNER IS SUSPECT OF BAD PARTS FROM MFG. (K)

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