SDR 96ZZZX851

Service difficulty report · Crankcase · Cessna 421B

Difficulty date: January 17, 1996
Submitted: March 26, 2000
Operation: General aviation
Aircraft: N7560Q
Make and model: Cessna 421B
Aircraft serial: 421B0346
Engine: Cont GTSIO520H
System (JASC): 8520 · Reciprocating Engine Power Section
Part: Crankcase
Condition: Cracked
Location: Nr 3 Cylinder
Stage of operation: IN
Nature of condition: K
Precautionary procedure: K

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

What was found

UPON INSPECTION IAW AD 77-13-22 CRANKCASE CRACKS, CRACK FOUND AT NR 3 CYLINDER UPWARDS UNDER ENGINE DATA PLATE, LENGTH UNDETERMINED, BUT LEAKING OIL MAKES UNAIRWORTHY. ENGINE REMOVED FROM LEFT POSITION. ENT TT, 3,334.2 HOURS. ENG TSMOH, 916.3 HOURS. NOTE: RIGHT ENGINE HAS HEAVY CASE INSTALLED.

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