# SDR FDEA201507222299

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 22, 2015
- Submitted: July 23, 2015
- Operation: Air carrier
- Aircraft: [N529FE](https://openairdocs.org/aircraft/N529FE), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48624
- Aircraft time: 477 hours, 10,133 cycles
- System (JASC): [2424 · AC Regulator](https://openairdocs.org/jasc/2424)
- Part: Gcu
- Part number: 750864D
- Part serial: 0731
- Condition: Malfunctioned
- Location: Nr 1
- Stage of operation: TO
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA201507222299

## Discrepancy

AFTER TAKEOFF AS GEAR WAS RETRACTING CAPTAIN`S 1, 2 & 3 DU'S WENT DARK.  MULTIPLE LEVEL 1 & 2 ALERTS, SOME WERE TRANSITORY.  THOSE WE WORKED WERE GEN 1 OFF, AC BUS TIE 1, EMER POWER & BATTERY DISCHARGE.  CLEANED UP CAC IAW MM 05-50-02.  INSPECTED & FOUND NR 1 GCU FAULTED.  R & R NR 1 GCU IAW MM 24-21-03-4.  PERFORMED OPERATIONS CHECK IAW 24-21-03-5.  ALL CHECKED GOOD.  GND RAN ALL 3 ENGS IAW JRH CHAPTER 5.  SWAPPED POWER FROM ENG TO APU GND.  ALL CHECKED GOOD.  ACFT OK FOR SERVICE.

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