# SDR AU991062

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 22, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Piper PA-30
- Registry model: [Piper PA-30](https://openairdocs.org/model/piper-pa-30) (OpenAirDocs)
- Engine: Lyc IO320B1A
- Propeller: Hartzl HCE2YR2
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Crankshaft
- Condition: Failed
- Location: Engine
- Stage of operation: DE
- Nature of condition: E, K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AU991062

## Discrepancy

(AUS) CRANKSHAFT BROKEN AT NR 1 CONNECTING ROD POSITION.  NR 1 CONNECTING ROD BEARING SPINNING. CRANKCASE THRUST FACE WORN.  INVESTIGATION FOUND THAT THE FAILURE WAS A RESULT OF FATIGUE INITIATING FROM A SMALL DEFECT ON THE CRANKSHAFT CHEEK ADJACENT TO THE SLUDGE TUBE  HOLE.

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