SDR 97ZZZX1234

Service difficulty report · Through Bolt · Beech 58

Difficulty date
March 12, 1997
Submitted
March 26, 2000
Operation
General aviation
Aircraft
N977GF
Make and model
Beech 58
Aircraft serial
TH175
Engine
Cont IO520C
Part
Through Bolt
Part number
641931075
Condition
Failed
Location
Nr 2 Cylinder
Part time
781 hours
Stage of operation
CR
Nature of condition
O
Precautionary procedure
O

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

What was found

UPON INSPECTION OF LT ENGINE, FOUND NR 2 CYLINDER SEPARATED FROM CASE BY 2-3 INCHES. UPPER THROUGH-BOLT APPEARS TO BE BROKEN INTERNALLY AS WELL AS LOWER THROUGH-BOLT, ALL UPPER AND LOWER CASE STUDS TO CYLINDER HOLD-DOWN APPEAR TO BE BROKEN AT THREAD AREA OR AFT OF THREAD AREA. PISTON STILL CONNECTED TO CONNECTING ROD TO CRANKSHAFT. EVIDENCE OF PISTON SKIRT AND RING MATERIAL IN CASE. AIRCRAFT IN NORMAL CRUISE SETTING WITH TEMPS AND PRESSURES NORMAL.

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