# SDR SWAA2018031320367

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 1, 2018
- Submitted: March 13, 2018
- Operation: Air carrier
- Aircraft: [N486WN](https://openairdocs.org/aircraft/N486WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33852
- Aircraft time: 47,570 hours, 27,992 cycles
- System (JASC): [2822 · Fuel Boost Pump](https://openairdocs.org/jasc/2822)
- Part: Pump
- Part number: 609891004
- Part serial: 80406000T
- Condition: Malfunctioned
- Location: Center Tank
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2018031320367

## Discrepancy

DURING CRUISE,  WITH CENTER FUEL TANK PUMPS RUNNING,  AN INCREASING FUEL IMBALANCE WAS BEING INDICATED.  THE LT MAIN QUANTITY CONTINUED TO DEPLETE UNTIL THE CENTER PUMPS WERE TURNED OFF AND THE CENTER TANK WAS EMPTY.  R & R THE CENTER TANK BOOST PUMP IAW AMM.

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