# SDR CALA2026051116144

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 8, 2026
- Submitted: May 11, 2026
- Operation: Air carrier
- Aircraft: [N2251U](https://openairdocs.org/aircraft/N2251U), registered now
- Make and model: Boeing 777-300ER
- Registry model: [Boeing 777-300ER](https://openairdocs.org/model/boeing-777-300er) (OpenAirDocs)
- Aircraft serial: 66591
- Aircraft time: 26,933 hours, 3,129 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Switch
- Condition: Malfunctioned
- Location: Zone 200
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026051116144

## Discrepancy

EMERGENCY LIGHTS CAME ON IN CRUISE.  MOVED SWITCH TO OFF AND THEY STAYED ON.  MOVED SWITCH TO ON AND THEN BACK TO ARMED AND LIGHTS WENT OUT.  PERFORMED FIM PROCEDURE PER B773 FIM 33-51 TASK 802. NO ACTIVE CORRELATED MAINTENANCE MESSAGE. PERFORMED OPS TEST OF THE EMERGENCY LIGHTS WITH THE CONTROL SWITCHES IAW AMM 33-51-00-710-803. TEST SATISFACTORY. REV. 106.

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