# SDR IPXA2021051069172

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 9, 2021
- Submitted: May 10, 2021
- Operation: Air carrier
- Aircraft: [N574UP](https://openairdocs.org/aircraft/N574UP), registered now
- Make and model: Boeing 747-44AF
- Registry model: [Boeing 747-44AF](https://openairdocs.org/model/boeing-747-44af) (OpenAirDocs)
- Aircraft serial: 35663
- Aircraft time: 49,610 hours, 7,433 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 20131A
- Part serial: 100663
- Condition: Inoperative
- Location: Emergency Lights
- Stage of operation: IN
- 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/IPXA2021051069172

## Discrepancy

INSPECTION TYPE:18FOFOUND U/D DOOR AREA EMERGENCY LIGHT INOP.I.A.W. AMM 33-51-04-902-001-001 REV.101.01 REPLACED THE U/D EMERGENCY LIGHT BATTERY (M5168), AND PERFORMED EMERGENCY LIGHT OPERATIONAL TEST, RESULT WAS SATISFACTORY.

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