# SDR IPXA2025082526064

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 18, 2025
- Submitted: August 26, 2025
- Operation: Air carrier
- Aircraft: [N576UP](https://openairdocs.org/aircraft/N576UP), registered now
- Make and model: Boeing 747-44AF
- Registry model: [Boeing 747-44AF](https://openairdocs.org/model/boeing-747-44af) (OpenAirDocs)
- Aircraft serial: 35665
- Aircraft time: 61,526 hours, 9,715 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 20131A
- Part serial: 110582
- Condition: Inoperative
- 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/IPXA2025082526064

## Discrepancy

FOUND THE UPPER DECK AISLE EMERGENCY LIGHT M4915 AND L5733 INOP.   I.A.W AMM 33-51-04-902-001-001 REV.114 REPLACED EMERGENCY LIGHT BATTERY (M5169) AT UPPER DECK SIDEWELL & PERFORMED EMERGENCY LIGHT (M4915 L5733) TEST,  RESULT WAS SATISFACTORY.

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