# SDR ASAA2021032834426

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 28, 2021
- Submitted: April 1, 2021
- Operation: Air carrier
- Aircraft: [N457AS](https://openairdocs.org/aircraft/N457AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36355
- Aircraft time: 26,287 hours, 8,499 cycles
- System (JASC): [2840 · Fuel Indicating System](https://openairdocs.org/jasc/2840)
- Part: Compensator
- Part number: 2020202
- Part serial: 14770
- Condition: Failed
- Location: Wing Fuel Tank
- Part time: 26,330 hours, 8,507 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/ASAA2021032834426

## Discrepancy

#2 FQIS COMPENSATOR PROBE FOUND BAD DURING TSR710603. COMP PROBE OUT OF TOLERANCE AT 60.23 PICO FARADS REF FQIS SYSTEM TEST B737-900 AMM 28-41-00-730-801 AND PROBE TEST AMM 28-41-21/501. GROUNDED - YES.  REPLACED #2 COMPENSATOR PROBE IAW B737-900 AMM 28-41-21-400-801. FQIS SYSTEM TEST PASS, #2 COMP 57.90 PF REF AMM 28-41-00-730-801. FQIS BITE PASS.

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