# SDR ASAA201912131588

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 12, 2019
- Submitted: December 14, 2019
- Operation: Air carrier
- Aircraft: [N585AS](https://openairdocs.org/aircraft/N585AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35683
- Aircraft time: 46,552 hours, 13,946 cycles
- System (JASC): [2820 · Aircraft Fuel Distribution System](https://openairdocs.org/jasc/2820)
- Part: Valve
- Condition: Malfunctioned
- Location: Fuel
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA201912131588

## Discrepancy

JUST AFTER LEVEL OFF AT FL 400 AND FUEL CHECKED BALANCED AND NORMAL PLANNED BURN, RIGHT TANK SHOWED 1000 + IMBALANCE. MOMENTARILY OPENED CROSSFEED AND TURNED OFF #2 FUEL PUMPS WITH CROSSFEED OPEN AND ONLY #1 PUMPS RUNNING, #1 TANK QTY DECREASED RAPIDLY. RAN QRH AND RECONFIGURED PUMPS. FUEL IMBALANCE AND OTHER INDICATIONS RETURNED TO NORMAL. GROUNDED - YES. ACCOMPLISHED FUEL COMPARISON CHECK PER B737-800 AMM 28-41-00 AND CROSSFEED VALVE OPERATIONAL TEST PER AMM 28-22-00.

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