# SDR BSY2008F00008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 21, 2008
- Submitted: November 28, 2008
- Operation: Air carrier
- Aircraft: N21ES
- Make and model: Beech 58
- Registry model: [Beech 58](https://openairdocs.org/model/beech-58) (OpenAirDocs)
- Aircraft serial: TH1123
- System (JASC): [3700 · Vacuum System](https://openairdocs.org/jasc/3700)
- Part: Pump
- Part number: 442CW12
- Part serial: 3723
- Condition: Failed
- Location: Vacuum System
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/BSY2008F00008

## Discrepancy

LT ENGINE DRIVEN VAC PUMP FAILED THE SCREW FOR CHECKING WEAR WAS MISSING CAUSING PREMATURE FAILURE.  (K)

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