# SDR SWAA2025102025701

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 18, 2025
- Submitted: June 5, 2026
- Operation: Air carrier
- Aircraft: [N479WN](https://openairdocs.org/aircraft/N479WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33990
- Aircraft time: 70,135 hours, 42,348 cycles
- System (JASC): [2841 · Fuel Quantity Indicator](https://openairdocs.org/jasc/2841)
- Part: Processor
- Condition: Leaking
- Location: Zone 600
- Stage of operation: CR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2025102025701

## Discrepancy

SUSPECTED FUEL LEAK. ALSO FUEL IMBALANCE RT SIDE FIRST THEN LEFT SIDE. 5.8 AT GATE IN JAX. SUPPOSED TO LAND WITH 6.6 IN MCO. ALSO HAD 6.3 AT GATE IN JAX. IT NOW STATES 5.7 (6.6). NH 30 DAYS.    ACCOMPD GVI OF MAIN WING & CENTER TANKS PER AMM 28-11-00; NO LEAKS NOTED. ACCOMPD TANK FQIS TO STICK COMPARISON CHK PER AMM 28-41-00; FOUND NR 2 MAIN TANK OUT OF TOLERANCE. OK TO CONTINUE PER MEL 28-6-01.  PERFORMED TANK & COMPENSATOR UNITS - FUEL QTY IND SYS HEALTH CHK IAW AMM 28-41-21 & FOUND TANK UNIT 7 BELOW NORMAL READING.   R & R FUEL QTY PROCESSOR IAW AMM 28-41-81. FUEL QTY PROCESSOR UNIT INSTALL TEST REQUIRED.   PERFORMED FUEL QTY PROCESSOR UNIT INSTALL TEST PER AMM 28-41-81; NO DEFECTS NOTED AT THIS TIME. R&R RT  WNG FUEL QTY COMP & F3, F4, F5, F6, F7, & F8 FUEL QTY UNITS. RT WNG FUEL QTY OPS CHKD GOOD IAW AMM 28-41-21.

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