# SDR ASAA2021122136974

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 21, 2021
- Submitted: December 23, 2021
- Operation: Air carrier
- Aircraft: [N512AS](https://openairdocs.org/aircraft/N512AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39043
- Aircraft time: 48,018 hours, 14,181 cycles
- System (JASC): [2840 · Fuel Indicating System](https://openairdocs.org/jasc/2840)
- Part: Compensator
- Part number: 2020201
- Part serial: 1428
- Condition: Faulty
- Location: #1 Main Tank
- Part time: 19,659 hours, 5,998 cycles
- Stage of operation: IN
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021122136974

## Discrepancy

#1 FQIS FAILS SYSTEM TEST. COMPENSATOR PROBE F15 AND PROBES TU7, TU8, TU10, AND TU11 ARE OUT OF ACCEPTABLE CAPACITANCE VALUES. GROUNDED - YES. REMOVED AND REPLACED #1 FQIS COMPENSATOR PROBE AND PROBES TU7, TU8, TU10, AND TU11. ALL PROBES REPLACED PER B737-800 AMM 28-41-21/401 AND CAPACITANCE VALUES NOW READ GOOD. ALL ITEMS COMPLETE AND CLOSED. LEAK CHECK AND INSPECTION REQUIREMENTS. #1 FQIS OK FOR ETOPS SERVICE. FUEL LOAD BALANCED FOR DISPATCH.

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