# SDR KCSA202607021098

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 2, 2026
- Submitted: July 2, 2026
- Operation: Air carrier
- Aircraft: [N742CK](https://openairdocs.org/aircraft/N742CK), registered now
- Make and model: Boeing 747446
- Aircraft serial: 24424
- Aircraft time: 126,527 hours, 25,963 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: No Test
- Location: Zone 200
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/KCSA202607021098

## Discrepancy

EMERGENCY LIGHT OVER L1 FAILED LIGHT TEST

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