# SDR KCSA202209321

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 3, 2022
- Submitted: September 7, 2022
- Operation: Air carrier
- Aircraft: [N742CK](https://openairdocs.org/aircraft/N742CK), registered now
- Make and model: Boeing 747446
- Aircraft serial: 24424
- Aircraft time: 113,543 hours, 23,927 cycles
- System (JASC): [3300 · Lighting System](https://openairdocs.org/jasc/3300)
- Part: None
- Part number: 90083
- Part serial: 40212
- Condition: Unserviceable
- Location: R/H Aft
- Stage of operation: UK
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/KCSA202209321

## Discrepancy

EMERGENCY LIGHTS DON'T AGREE WITH COMMANDED SWITCH POSITION. REMOVED AND REPLACED UPPER DECK RIGHT BACK EMERGENCY BATTERY SUPPLY ASSEMBLY IAW B747-400 AMM 33-51-04. ALL CHECKS GOOD.

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