SDR 20010228CW003

Service difficulty report · Crankcase · Beech M35

Difficulty date: February 1, 2001
Submitted: February 28, 2001
Operation: General aviation
Aircraft: N9748R
Make and model: Beech M35
Aircraft serial: D6229
Engine: Cont IO470C
System (JASC): 8520 · Reciprocating Engine Power Section
Part: Crankcase
Part number: 629288
Condition: Cracked
Location: Lt Top Ctr Crkcs
Part time: 5,874 hours
Stage of operation: IN
How discovered: V
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

DURING ANNUAL INSP, OIL LEAK NOTED AT TOP OF CRANKCASE, CLEANING AND RERUN, OIL LEAK RETURNED. FOUND 1.25 IN CRACK EXTENDING FROM TOP CENTER CASE BOLT HOLE AT AREA WHERE FUEL FLOW DIVIDER BRACKET ATTACHES. CRACK IN NON-CRITICAL AREA AND WITHIN CRACK LIMITATIONS EXCEPT OIL LEAK IN EXCESS. ENGINE REMOVED FOR REPAIRS/ CRANKCASE RECONDITIONED.

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