# SDR SWAA2025120240997

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 29, 2025
- Submitted: December 2, 2025
- 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: 70,468 hours, 42,588 cycles
- System (JASC): [2840 · Fuel Indicating System](https://openairdocs.org/jasc/2840)
- Part: Pressure Switch
- Condition: Faulted
- Location: Zone 100
- Stage of operation: TO
- How discovered: V
- Nature of condition: J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2025120240997

## Discrepancy

ON TAKEOFF ROLL BOTH FWD AND AFT PUMP LOW PRESSURE LIGHTS IN NR 2 TANK WERE ALTERNATING ON AND OFF.   REMOVED AND REPLACED THE FUEL SYSTEM MODULE. OPS CHECKED GOOD. IAW AMM 28-22-43.

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