# SDR 2009FA0000451

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 11, 2009
- Submitted: June 2, 2009
- Operation: General aviation
- Aircraft: [N521PD](https://openairdocs.org/aircraft/N521PD), registered now
- Make and model: Doug MD500E
- Aircraft serial: 0321E
- Engine: Allsn 250C20B
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Impeller
- Condition: Cracked
- Location: Blower
- Part time: 439 hours
- Component: Blower
- Component part number: 369D25630101
- 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/2009FA0000451

## Discrepancy

IMPELLER CRACKED AT ATTACH POINT TO SHAFT.  PILOT REPORTED LOUD NOISE AND LANDED THE HELICOPTER.

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