# SDR ASAA2015112914029

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 29, 2015
- Submitted: December 3, 2015
- Operation: Air carrier
- Aircraft: [N506AS](https://openairdocs.org/aircraft/N506AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35690
- Aircraft time: 28,757 hours, 8,832 cycles
- System (JASC): [2840 · Fuel Indicating System](https://openairdocs.org/jasc/2840)
- Part: Compensator
- Part number: 2020201
- Condition: Contaminated
- Location: Main Fuel
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015112914029

## Discrepancy

NR 2 MAIN TANK FUEL INDICATION UNRELIABLE.  INDICATION SLOW DECREASE UNTIL STABILIZING AT 7,450, 1050 LOW, WHILE DRAWING FUEL FROM ONLY THE CENTER TANK.  ONCE STARTED FEEDING TANK TO ENGINE, NR 2 READ APPROXIMATELY 600 ACCORDING FUEL LOGS.  ACFT GROUNDED.  FOUND WATER CONTAMINATION IN COMPENSATOR UNIT AND FAULTS 28-41203.  REPLACED NR 2 MAIN TANK COMPENSATOR UNIT.  FQIS SYS TEST NORMAL REF AMM 28-41-00-730-801 AND COMPENSATOR INSTALLATION REF AMM 28-41-21.  ACCESS PANEL LEAKS CHECKED GOOD REF AMM. 28-11-11.

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