# SDR UIEA2026040800176

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 6, 2026
- Submitted: April 8, 2026
- Operation: Air carrier
- Aircraft: [N482MC](https://openairdocs.org/aircraft/N482MC), registered now
- Make and model: Boeing 747443
- Aircraft serial: 32340
- Aircraft time: 95,733 hours, 12,829 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 20131ASMI
- Part serial: 15266
- 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/UIEA2026040800176

## Discrepancy

FOUND L4 DOOR OVRD EMERGENCY LIGHT (M7921) FUNCTION FAIL.   REPLACED L DR4 OVRD EMERGENCY LIGHT (M7921) POWER SUPPLY BATTERY IAW AMM 33-51-04-902-001-001 REV 116. 2. PERFORMED POWER SUPPLY BATTERY INSTALLATION TEST IAW AMM 33-51-04-902-001-001 REV 116. THE RESULT WAS SATISFACTORY.

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