# SDR 2008UALA03109

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 31, 2008
- Submitted: July 15, 2008
- Operation: Air carrier
- Aircraft: [N668UA](https://openairdocs.org/aircraft/N668UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 30024
- Aircraft time: 32,755 hours, 9,056 cycles
- Engine: Pwa PW4056
- System (JASC): [7500 · Engine Bleed Air System](https://openairdocs.org/jasc/7500)
- Part: Control Valve
- Part number: 97980612
- Part serial: 2975
- Condition: Malfunctioned
- Location: Lt Engine Surge
- Stage of operation: IN
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2008UALA03109

## Discrepancy

NR 1 ENGINE WOULD NOT START ON APU DUCT LOW 20 PSI NR 2 STARTED DID XBLEED.   *S/D*  PER HNL "CHECKED THE DUCT PRESSURE FLUCTUATES WITH NO LOAD.  CLEANED SURGE VALVE FILTER, NO HELP.  REPLACED SURGE CONTROL VALVE  MR49532-222 (979806-12) WITH MR49532-231.  ENGINE START GOOD 30 PLUS PSI ".  NO SHOP FINDINGS ARE AVAILABLE ON OFF UNIT.                          


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