# SDR ASAA2026021464341

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 14, 2026
- Submitted: February 16, 2026
- Operation: Air carrier
- Aircraft: [N459AS](https://openairdocs.org/aircraft/N459AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36352
- Aircraft time: 44,146 hours, 13,742 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Light Sys
- Condition: Malfunctioned
- 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/ASAA2026021464341

## Discrepancy

CABIN EMERGENCY LIGHTS ARE COMING ON WHEN GROUND SOURCE SWITCH HELD AND GROUND POWER/ BATTERY TURNED OFF. GROUNDED - YES. COULD NOT DUPLICATE EMERGENCY EXIT LIGHT SYSTEM OPERATES NORMALLY NO DEFECTS NOTED.

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