# SDR HEEA078481

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 29, 2002
- Submitted: April 29, 2002
- Operation: General aviation
- Aircraft: [N131](https://openairdocs.org/aircraft/N131), registered now
- Make and model: Bell TH-57A
- Registry model: [Bell TH-57A](https://openairdocs.org/model/bell-th-57a) (OpenAirDocs)
- Aircraft serial: 162817
- Aircraft time: 11,494 hours
- Engine: Allsn 250C18
- System (JASC): [7250 · Turbine Section](https://openairdocs.org/jasc/7250)
- Part: Bearing Race
- Part number: 23071309
- Part serial: KU103370
- Condition: Spalled
- Location: Turbine Section
- Part time: 727 hours
- 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/HEEA078481

## Discrepancy

TURBINE WAS REMOVED DUE TO METAL IN OIL.  INSPECTION REVEALED SPALLING ON INNER RACE COUPLING BEARING RACE. INSTALLED NEW INNER RACE COUPLING.

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