# SDR ASOA20130830157

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 30, 2013
- Submitted: September 3, 2013
- Operation: Air carrier
- Aircraft: N14939
- Make and model: Emb EMB-145EP
- Registry model: [EMB EMB-145EP](https://openairdocs.org/model/embraer-emb-145ep) (OpenAirDocs)
- Aircraft serial: 145030
- Aircraft time: 32,364 hours, 31,321 cycles
- System (JASC): [2435 · Starter-Generator](https://openairdocs.org/jasc/2435)
- Part: Starter Gen
- Part number: 23080013A
- Part serial: 97396
- Condition: Malfunctioned
- Location: Tail
- Part time: 15,792 hours, 16,361 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASOA20130830157

## Discrepancy

THE CREW REPORTED AN ELECTRICAL PROBLEM WITHTHE MAIN BUS SHORTING OUT AT 23K FT ALT WITH A LOUD BANG WHICH SHOOK THE ENTIRE ACFT.  SMOKE, ELECTRICAL SMELL CAME IN THE COCKPIT, AFTER THE BANG.  THE ACFT PERFORMED AN EMERGENCY LANDING WITHOUT INCIDENT.  MX INSPECTED COCKPIT POWER SUPPLIES WITH NO EVIDENCE OF SMOKE OR BURNING, AND FOUND THE APU GENERATOR AND GCU TO BE SENDING THE ACFT INTO ESSENTIAL POWER. MX R & R THE APU STARTER GENERATOR AND APU GCU, OPERATIONALLY TESTED WITH NO DEFECTS, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.

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