# SDR ASAA2020022412239

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 21, 2020
- Submitted: February 24, 2020
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 52,310 hours, 15,246 cycles
- System (JASC): [2841 · Fuel Quantity Indicator](https://openairdocs.org/jasc/2841)
- Part: Indication Sys
- Condition: Malfunctioned
- Location: Fuel Qty
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020022412239

## Discrepancy

IN CRUISE OVER A THREE HOUR PERIOD #1 MAIN TANK FUEL INDICATION DROPPED FROM 8.62 DOWN TO 8.35. #2 MAIN TANK REMAINED FULL. CROSS FEED FUNCTION NORMAL. RAMP FUEL IN LIH WAS 41.5 WITH BOTH MAIN TANKS FULL AND THE REMAINING FUEL IN CENTER TANK. FF ON #1 ENGINE WAS HIGHER WHEN CENTER TANK WAS EMPTY, IMBALANCE WENT FROM 300-400 LBS. FUEL BALANCE WAS NORMAL AS WELL AS OVERALL FUEL BURN THROUGHOUT THE FLIGHT. GROUNDED - YES. ACCOMPLISHED FQIS BITE REF B737-800 FIM 28-41 TASK 801 NO FLT FAULTS AND GND TEST PASS, CURRENT STATUS NO FAULTS. VERIFIED #1 AND #2 FUEL QTY'S MATCH USING ALTERNATE FUEL STICK METHOD, WING GAGES AND FLT DECK GAGES.

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