# SDR UIEA2026092700917

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 7, 2026
- Submitted: October 8, 2026
- Operation: Air carrier
- Aircraft: [N486MC](https://openairdocs.org/aircraft/N486MC), registered now
- Make and model: Boeing 747-45EF
- Registry model: [Boeing 747-45EF](https://openairdocs.org/model/boeing-747-45ef) (OpenAirDocs)
- Aircraft serial: 30608
- Aircraft time: 111,088 hours, 19,701 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 20131A
- Part serial: 500995
- 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/UIEA2026092700917

## Discrepancy

DURING THE EMERGENCY LIGHTS BATTERY PACKS TESTS, FOUND M5168 AND M5169 POWER SUPPLY BATTERY PACKS FAILED TO TEST.(<P>02 EA EMERGENCY BATTERY PACK ASSY M5168 AND M5169 WERE REPLACED, AND OPS TEST WAS COMPLETED PER AMM 33-51-04-902-001-001 REV 117. OPS TEST WAS SATISFACTORY. NO FURTHER DEFECTS NOTED.</P>)

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