# SDR CA980930012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 22, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Engine: Lyc O360A3A
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Crankshaft
- Part number: 74970
- Condition: Cracked
- Location: Engine
- Stage of operation: NR
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA980930012

## Discrepancy

(CAN) REPORT OF PROBLEMS WITH CRANKSHAFT BALANCING R & O SHOP LED OWNER TO GROUND HIS AIRCRAFT AND REMOVE THE CRANKSHAFT FOR MPI INSPECTION.  CRACKS WERE FOUND AROUND 80 PERCENT OF THE NR 4 CRANKPIN RADIUS.  SIGNS OF OVERHEATING WERE ALSO PRESENT ON THE SURFACE OF THE MAIN JOURNAL.  THE CRANKSHAFT WAS REPLACED.

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