# SDR 20010420CW002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 29, 2001
- Submitted: April 20, 2001
- Operation: Air carrier
- Aircraft: [N31PR](https://openairdocs.org/aircraft/N31PR), 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: 317952049
- Engine: Lyc TIO540*
- Propeller: Hartzl HCC3YR2
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Crankcase
- Part number: 11F20022D3
- Condition: Cracked
- Location: Lt Engine
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/20010420CW002

## Discrepancy

REMOVED COWLINGS TO CHANGE/SERVICE ENGINES WITH OIL.  FOUND LEFT ENGINE CASE CRACKED ABOVE NR 6, NR 4, AND NR 1 TAPPET HOUSING.  ALL THREE CRACKS APPEARED TO BE PUSHED FROM INSIDE OUT.  NONE WERE LEAKING OIL YET AND HAD NOT BEEN PRESENT 20 HOURS EARLIER.  WHEN LAST WORK WAS DONE IN ENGINE COMPARTMENT.

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