# SDR 2007UALA02179

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 23, 2007
- Submitted: July 20, 2007
- Operation: Air carrier
- Aircraft: [N204UA](https://openairdocs.org/aircraft/N204UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 28713
- Aircraft time: 37,561 hours, 5,581 cycles
- Engine: Pwa PW4090
- System (JASC): [2822 · Fuel Boost Pump](https://openairdocs.org/jasc/2822)
- Part: Valve
- Part number: 60B924015
- Condition: Leaking
- Location: Lt Fuel Pump
- Stage of operation: NR
- How discovered: 9
- Nature of condition: K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2007UALA02179

## Discrepancy

UNWANTED FUEL TRANSFER FROM CENTER TANK TO RIGHT MAIN TANK.  *S/D*  AFTER EXTENSIVE TROUBLESHOOTING AND REPLACEMENT OF LEFT REFILL VALVE CONTROLLER DIDN'T SOLVE PROBLEM.  REPLACED LEFT MAIN AFT PUMP DISCHARGE CK VALVE PER MM 28-22-08.  OPS CHECK GOOD.

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