# SDR COEA2015071414913

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 14, 2015
- Submitted: July 16, 2015
- Operation: Air carrier
- Aircraft: [N913FX](https://openairdocs.org/aircraft/N913FX), registered now
- Make and model: Aerosp ATR 42-300
- Registry model: [Aerosp ATR 42-300](https://openairdocs.org/model/aerospatiale-aeritalia-atr-42-300) (OpenAirDocs)
- Aircraft serial: 250
- Aircraft time: 26,442 hours, 34,903 cycles
- System (JASC): [7722 · Engine EGT/TIT Indicating System](https://openairdocs.org/jasc/7722)
- Part: Buss Bar
- Condition: Shorted
- Location: Itt
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/COEA2015071414913

## Discrepancy

FLIGHT 7820, AIR TURN BACK DISCREPANCY, SHORTLY AFTER TAKEOFF, THE CREW RECEIVED A MASTER CAUTION INDICATION ON THE CREW ALERTING PANEL.  THE NR 1 ENG ITT INDICATED 500, NR 2 ENG ITT INDICATED 850, WITH TORQUES SET AT 90%.  THE REW ELECTED TO RETURN, NO EMER WAS DECLARED.  AFTER EXTENSIVE TROUBLESHOOTING, MX FOUND THAT THE THERMO COUPLER BUS BAR HAD SHORTED.  MX CLEANED THE BUS BAR.  PERFORMED A BORESCOPE INSPECTION, PERFORMED ENG RUNS.  NO DEFECTS NOTED.  OPERATIONS CHECKED FLIGHT STILL TO BE DONE.

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