# SDR HEEA063668

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 17, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N5421E
- Make and model: Bolkms BO105S
- Aircraft serial: S806
- Engine: Allsn 250C20B
- System (JASC): [7250 · Turbine Section](https://openairdocs.org/jasc/7250)
- Part: Seal
- Part number: 6898764
- Condition: Chipped
- Location: Oil Bellows
- Part time: 978 hours
- Component: 6898735
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HEEA063668

## Discrepancy

ENGINE REMOVED DUE TO  TURBINE OVERHAUL.  UPON INSPECTION OF TURBINE PARTS NOTED:  PITS AND CHIPPING ON CARBON SEAL MATING SURFACE.  INSTALLED NEW CARBON SEAL.

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