# SDR KCSA2026051927

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 19, 2026
- Submitted: May 20, 2026
- Operation: Air carrier
- Aircraft: [N793CK](https://openairdocs.org/aircraft/N793CK), registered now
- Make and model: Boeing 777F1H
- Registry model: [Boeing 777F1H](https://openairdocs.org/model/boeing-777f1h) (OpenAirDocs)
- Aircraft serial: 35608
- Aircraft time: 65,421 hours, 10,775 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Switch
- Condition: Faulted
- Location: Zone 200
- Stage of operation: IN
- 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/KCSA2026051927

## Discrepancy

EMERGENCY LIGHT SWITCH WHEN FLUSH GOES TO OFF. CORRECTIVE ACTION: EMERGENCY LIGHT SWITCH GUARD MECHANISM REFITTED AND EMERGENCY LIGHT OPS TEST NML IAW B777 AMM 33-51-00.

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