SDR 99ZZZX1200

Service difficulty report · Bolt · Cessna 421C

Difficulty date: March 1, 1999
Submitted: March 26, 2000
Operation: General aviation
Aircraft: N215MP
Make and model: Cessna 421C
Aircraft serial: 421C1231
Engine: Cont GTSIO520N
System (JASC): 8520 · Reciprocating Engine Power Section
Part: Bolt
Part number: 6419311075
Condition: Broken
Location: Nr 5 Cylinder
Stage of operation: IN
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

WHILE TROUBLESHOOTING AN OIL LEAK, THE LOWER THRU-BOLT BETWEEN THE NR 4 AND NR 5 CYLINDER WAS FOUND BROKEN APPROXIMATELY .50 INCH FROM THE END. AFTER CYLINDER REMOVAL AND COMPLETE CRANKCASE AND TORQUE INSPECTION, NO OTHER DEFECTS WERE FOUND.

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