# SDR UIEA2025070300830

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 14, 2025
- Submitted: July 17, 2025
- Operation: Air carrier
- Aircraft: [N450PA](https://openairdocs.org/aircraft/N450PA), registered now
- Make and model: Boeing 747-46NF
- Registry model: [Boeing 747-46NF](https://openairdocs.org/model/boeing-747-46nf) (OpenAirDocs)
- Aircraft serial: 30808
- Aircraft time: 100,859 hours, 16,937 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: BPS73
- Part serial: 39829
- 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/UIEA2025070300830

## Discrepancy

FUNCTIONAL TEST EMERGENCY LIGHTS BATTERY PACKS FOR CAPACITY (15 MIN. MINIMUM). FOUND EMERGENCY LT L1533, L5733, L5767 & M4915 WENT OFF IN LESS THAN 15 MINUTES.  EMERGENCY LT POWER PACK M5169 REPLACED AND OPERATION CHECKED NORMAL IAW AMM 33-51-04.

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