# SDR UALA2012032801958

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 28, 2012
- Submitted: April 25, 2012
- Operation: Air carrier
- Aircraft: [N221UA](https://openairdocs.org/aircraft/N221UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30552
- Aircraft time: 44,996 hours, 5,627 cycles
- Engine: Pwa PW40903
- System (JASC): [2822 · Fuel Boost Pump](https://openairdocs.org/jasc/2822)
- Part: O-Ring
- Condition: Cut
- Location: Boost Pump
- Stage of operation: NR
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012032801958

## Discrepancy

FUEL IMBALANCE, LEFT FUEL INDICATION INCREASE SLOWLY.  TEST FUEL QUANTITY INDICATION SYSTEM PER AMM.  NO FUEL QTY STATUS MESSAGE, NO TANK UNITS & DENSITOMETERS FAULTS IN HISTORY.  CONFIRMED SLOW RATE SUGGEST REMOVING LT PUMPS FOR INSPECTION AND POSSIBLE TANK ENTRY FOR INPECTION OF DISCHARGE CK VALVES & PICK UP LINES. REPLACED LT FWD BOOST PUMP.  FOUND LT FWD BOOST PUMP WITH CENTER O-RING CUT. CHECKED ALL FUEL QUANTITY ONBOARD INFO. ACFT HAD NO FUEL QUANTITY SYSTEM ISSUE TO REPORT.

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