# SDR AALA201909259001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 23, 2019
- Submitted: September 25, 2019
- Operation: Air carrier
- Aircraft: [N956UW](https://openairdocs.org/aircraft/N956UW), registered now
- Make and model: Emb ERJ 190-100 IGW
- Registry model: [EMB ERJ 190-100 IGW](https://openairdocs.org/model/embraer-erj-190-100-igw) (OpenAirDocs)
- Aircraft serial: 19000156
- Aircraft time: 24,967 hours, 20,663 cycles
- System (JASC): [2424 · AC Regulator](https://openairdocs.org/jasc/2424)
- Part: Gcu
- Part number: 1701321F
- Part serial: 0984
- Condition: Failed
- Location: Zone 100
- Part time: 24,000 hours, 19,592 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201909259001

## Discrepancy

AIRCRAFT WAS GROUNDED: PILOT REPORTS DURING CRUISE "IDG 1 OFF BUS" FORCED ELEC EMERGENCY CONDITION. APU STARTED SUCCESSFULLY TO RESTORE POWER, IDG 1 OFF BUS REMAINED. MAINTENANCE REPLACED #1 GCU IAW AMM 24-21-19. TEST OK IAW AMM 24-21-19. #1 IDG TEST OK IAW AMM 24-21-01.

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