# SDR 97UAL900070

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 26, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N663UA](https://openairdocs.org/aircraft/N663UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 27160
- Engine: Pwa PW4060
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Surge Valve
- Part number: 97980610
- Condition: Defective
- Location: Apu
- 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/97UAL900070

## Discrepancy

THE APU SHUTDOWN PRIOR TO ENGINE START.  THE APU WOULD NOT RESTART.  *S/D*  THE SURGE CONTROL VALVE WAS DEFECTIVE AND REPLACED, OPERATIONS CHECK NORMAL.  NO OTHER APU DISCREPANCIES HAVE  OCCURRED SINCE THIS INCIDENT.

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