# SDR SWAA2026102245732

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 21, 2026
- Submitted: October 23, 2026
- Operation: Air carrier
- Aircraft: [N477WN](https://openairdocs.org/aircraft/N477WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33988
- Aircraft time: 73,506 hours, 44,168 cycles
- System (JASC): [2780 · Leading Edge Slat Control System](https://openairdocs.org/jasc/2780)
- Part: Fuse
- Condition: Faulted
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2026102245732

## Discrepancy

LEADING EDGE FLAPS AND SLATS,  ONE OR MORE LEADING EDGE DEVICES 123 AND 4 SLATS 5678 SHOWED IN TRANSIT DURING FLIGHT.  TROUBLESHOT PER FIM 27-81 TASK 812. CHECKED FOR BYPASSING LE ACTUATORS AND LE UCM VALVE NO BYPASSING NOTED. RANG OUT WIRES A11 AND D12 IN CONNECTOR D728A NO DEFECTS NOTED. SUSPECT LE RETRACT FUSE TO BE INTERMITTENTLY FAULTY REMOVED AND REPLACED LE RETRACT FUSE REF AMM 27-81-61 OPS AND LEAK CHECKS GOOD. LE SLATS OPERATE NORMALLY.

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