# SDR IPXA10M59548

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 28, 2010
- Submitted: April 30, 2010
- Operation: Air carrier
- Aircraft: N296UP
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48474
- Engine: Pwa PW4460
- System (JASC): [2400 · Electrical Power System](https://openairdocs.org/jasc/2400)
- Part: Control Unit
- Part number: 750866D
- Part serial: 0181
- Condition: Inoperative
- Location: Cockpit
- Stage of operation: CR
- How discovered: O
- Nature of condition: H
- Precautionary procedure: J, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA10M59548

## Discrepancy

AFTER ABOUT 42 MINUTES OF FLIGHT TIME, LEVEL 1 EMERGENCY POWER ON DISPLAYED.  TRIED TO RECYCLE EMERGENCY POWER SWITCH NO CHANGE.  DUMPED 40,000 LBS FUEL FOR RETURN TO DEPARTURE.  EPCU FAULT "ADG BATT CTL RLY/INTFC" INDICATED ON CFDS. CURRENT FAULTS,  R & R EPCU IAW AMM 24-08-01 IAW FIM PROCEDURE 24-24-06-00.  ALSO REPLACED LT EMERGENCY AC BUSS SENSE RELAY AS PRECAUTION.  NO CURRENT FAULTS IND.  OK TO CONT.

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