# SDR C77A20151211001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 11, 2015
- Submitted: December 11, 2015
- Operation: Air carrier
- Aircraft: [N208AN](https://openairdocs.org/aircraft/N208AN), registered now
- Make and model: Emb ERJ 170-200 LR
- Registry model: [EMB ERJ 170-200 LR](https://openairdocs.org/model/embraer-s-a-erj-170-200-lr) (OpenAirDocs)
- Aircraft serial: 17000494
- Aircraft time: 919 hours, 557 cycles
- System (JASC): [2424 · AC Regulator](https://openairdocs.org/jasc/2424)
- Part: Gcu
- Part number: 1701321E
- Part serial: 1024
- Condition: Damaged
- Location: Zone 100
- Part time: 22,148 hours, 17,235 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/C77A20151211001

## Discrepancy

DC ESSENTIAL BUS 1 OFF WITH BATTERY 1 DISCHARGE.  RAN QRH 5.11 & DIVERTED.  UPON TROUBLESHOOTING FOUND GCU 1 TO BE DAMAGED.  R & R GCU 1 IN LICC IAW AMM 24-21-19.  OPERATIONS CHECKED SATISFACTORY, NO DEFECTS NOTED AT THIS TIME.  ACFT OK FOR SERVICE.

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