# SDR 2010FA0000847

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 9, 2010
- Submitted: August 20, 2010
- Operation: General aviation
- Make and model: Doug MD-90-30
- Registry model: [Doug MD-90-30](https://openairdocs.org/model/mcdonnell-douglas-md-90-30) (OpenAirDocs)
- System (JASC): [5100 · Standard Practices/Structures](https://openairdocs.org/jasc/5100)
- Part: Pump
- Part number: 64308463
- Part serial: A234C
- Condition: Failed
- Part time: 14,787 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/2010FA0000847

## Discrepancy

(HZ3R)  PUMP ASSY HAD SEVERE DAMAGES, SUCH AS GEAR BUSHINGS BROKE AND GEAR SHAFT DISASSEMBLED FROM NORMAL POSITION (STILL MOUNTED IN THE ROTOR).  STATOR ASSY - SEVERE DAMAGES FROM ROTOR ASSY.  END BELL ASSY - LINER HAS BEEN DISINTEGRATED.  LINER MOUNTING STRUCTURE ARE COMPLETELY DESTROYED.  ROTOR ASSY - EXCITER AND MAIN STATOR SEVERE DAMAGES.  SHAFT EXPERIENCED SEVERE HEATING DUE TO DISCOLORATION.  CAUSE: BASED ON THE AMOUNT OF DAMAGE TO THE PUMP, IT IS LIKELY THAT THE PUMP WAS FIRST TO FAIL.  PREVENTATIVE ACTION: PENDING COMPLETION OF ENGINEERING INVESTIAGTION.

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