# SDR 07FDEA02005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 25, 2007
- Submitted: May 31, 2007
- Operation: Air carrier
- Aircraft: [N605FE](https://openairdocs.org/aircraft/N605FE), registered now
- Make and model: Doug MD-11
- Registry model: [Doug MD-11](https://openairdocs.org/model/mcdonnell-douglas-md-11) (OpenAirDocs)
- Aircraft serial: 48514
- Aircraft time: 51,108 hours, 11,458 cycles
- System (JASC): [2420 · AC Generation System](https://openairdocs.org/jasc/2420)
- Part: Control Unit
- Part number: 750866D
- Part serial: 0126
- Condition: Failed
- Location: Emergency Power
- Part time: 151 hours, 34 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/07FDEA02005

## Discrepancy

AT APPROX 00:00Z GOT A MASTER WARNING LT W/A LEVEL 1 EMERGENCY POWER ON ALERT.  COMPLIED W/QRH.  SELECTED EMERGENCY POWER SWITCH TO OFF.  GOT LVL 1 L EMERGENCY AC BUSS ALERT.  SELECTED EMERGENCY POWER SWITCH BACK TO ARM , STILL HAD  EMERGENCY POWER ON LEVEL ONE ALERT.  CONSULTED W/GOC AND MOCC VIA SAT.  BATTERY VOLT NOW DOWN TO 24V -51.  WHEN VOLT DROPPED TO 22V (AMBER) DEPLOYED ADG IN ELEC  BATTERY CHARGED UP TO 32V, ELECTED TO DIVERT SEA.  ON NEXT POWER UP, EMERGENCY POWER TEST FAILED.  REF WDM 24-61-11, REMOVED AND REPLACED LEFT EMERGENCY CONTROL RELAY (R2-17) PER SMP.   REF AMM 24-24-00-5 AND EPCU R-T-S REF AMM  24-08-01-5, ALL TEST PASSED AND CHECKED NORMAL.  DID  NOT DUPLICATE FAULT, FINAL FIX REMOVED AND

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.