# SDR ASAA2015112813970

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 28, 2015
- Submitted: December 1, 2015
- Operation: Air carrier
- Aircraft: [N506AS](https://openairdocs.org/aircraft/N506AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35690
- Aircraft time: 28,751 hours, 8,831 cycles
- System (JASC): [2800 · Aircraft Fuel System](https://openairdocs.org/jasc/2800)
- Part: Fuel Sys
- Condition: Unknown
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015112813970

## Discrepancy

WHILE BURNING OUT OF CENTER TANK, STARTED NOTICING SLOW DECREASE IN NR 2 MAIN TANK QTY FUEL MONITORING INDICATED LOSS OF 1300 LBS BETWEEN 2 WAYPOINTS 1.5 THIS CORRESPONDS WITH WHAT WE SAW ON THE NR 2 FUEL GAUGE DECISION WAS MADE TO RETURN TO DEPARTURE, BY THE TIME WE LANDED THE PROBLEM SELF CORRECTED SUSPECT UNRELIABLE NR 2 FUEL GAUGE.  TOTAL FUEL USED FINAL QTY.  AGREED WITH DEP FUEL.  ACFT GROUNDED. DIVERSION TIME, 99 MINUTES.  PERFORMED VENT AND DRAIN INSPECTION ON BOTH ENGINES IAW AMM 71-71-00. NO LEAKS WERE NOTED.  PERFORMED FQIS BITE TEST IAW FIM 28-41, TASK 801 NO FAULS NOTED GROUND TEST PASS.  PERFORMED FUEL SUMPING ON ALL TANKS SUMP CKECKS GOOD PERFORMED FQIS WITH FUEL STICK COMPARRISON CHECK GOOD, ACFT OK FOR SERVICE.

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