# SDR UIEA2026040800178

- 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: Power Supply
- Part number: BP573
- Part serial: 50147
- Condition: Inoperative
- 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/UIEA2026040800178

## Discrepancy

FOUND ZONE B EMERGENCY LIGHT (M6879) FUNCTION FAIL..  REPLACED ZONE B EMERGENCY LIGHT (M6879) POWER SUPPLY IAW AMM 33-51-04-002-009-001 & AMM 33-51-04-402-012-001 REV 116.  PERFORMED POWER SUPPLY INSTALLATION TEST IAW AMM 33-51-04-402-012-001 REV 116. THE RESULT WAS SATISFACTORY.

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