# SDR 4022

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 14, 2004
- Submitted: May 12, 2006
- Operation: Air carrier
- Aircraft: [N525AA](https://openairdocs.org/aircraft/N525AA), registered now
- Make and model: Piper PA-31-350
- Registry model: [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350) (OpenAirDocs)
- Aircraft serial: 318052111
- Aircraft time: 11,797 hours, 11,797 cycles
- Engine: Lyc TIO540J2B
- Engine time: 224 hours, 224 cycles
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Crankshaft
- Condition: Failed
- Location: Lt Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: E, Y
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/4022

## Discrepancy

PILOT WAS IN CRUISE, LEFT ENGINE HAD VIBRATION AND UNCOMMANDED SHUT DOWN.  PILOT LANDED AT PHD.  VISUAL INSPECTION REVEALED CRANKCASE DAMAGE / CRANKSHAFT HAD FAILED.  REASON UNKNOWN AT THIS TIME.  REPLACED ENGINE WITH NEW.

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