# SDR ASAA2018121727473

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 17, 2018
- Submitted: December 20, 2018
- Operation: Air carrier
- Aircraft: [N570AS](https://openairdocs.org/aircraft/N570AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35185
- Aircraft time: 45,232 hours, 13,455 cycles
- System (JASC): [2824 · Fuel Transfer Valve](https://openairdocs.org/jasc/2824)
- Part: Not Reported
- Condition: Malfunctioned
- Location: Fuel System
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018121727473

## Discrepancy

FUEL IMBALANCE GOT PROGRESSIVELY WORSE DURING SHORT FLIGHT FROM SFO TO PDX, ABOUT 1+30 200 POUND IMBALANCE ON THE GROUND, 400 POUND IMBALANCE AT LEVEL OFF, 600 POUND IMBALANCE DURING DESCENT AND LANDING NR 2 TANK HIGH QTY. GROUNDED - YES. ACCOMPLISHED FUEL QTY COMPARISON CK IAW AMM 28-41-00 ALL CK NORMAL WITHIN LIMITS ACCOMPLISHED X-FEED VLV FUNC TEST IAW AMM 28-22-00 20 LBS OF FUEL TRANSFERRED TO NR 2 TANK.

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