# SDR IPXA2025031297716

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 12, 2025
- Submitted: March 12, 2025
- Operation: Air carrier
- Aircraft: [N263UP](https://openairdocs.org/aircraft/N263UP), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48782
- Aircraft time: 100,337 hours, 20,466 cycles
- System (JASC): [2460 · DC Power Distribution System](https://openairdocs.org/jasc/2460)
- Part: Power Supply
- 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/IPXA2025031297716

## Discrepancy

EMERGENCY POWER TEST FAIL DURING PREFLIGHT FOUND AMMETER NEGATIVE C/B B1-1004 OPEN WHEN CLOSED. R&R PERF SWPM 20-60. OPS CHECK NORMAL. RETURN TO SERVICE TEST OF EPCU WAS NORMAL PER AMM 24-08-01.

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