# SDR CA120329001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 27, 2012
- Submitted: September 14, 2015
- Operation: General aviation
- Make and model: Aerosp ATR 72-212A
- Registry model: [Aerosp ATR 72-212A](https://openairdocs.org/model/aerospatiale-atr-72-212a) (OpenAirDocs)
- Engine: Pwc PW127F
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Power Loss
- Stage of operation: CL
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA120329001

## Discrepancy

(CAN) AFTER TAKEOFF, THE CREW FELT YAW MOVEMENT AS ENGINE NR 2 TORQUE DROPPED TO 30 PERCENT FOR A MOMENT THEN CAME BACK TO NORMAL.  THE CREW OPTED TO TURN AND LAND BACK AT THE POINT OF DEPARTURE. TROUBLESHOOTING IS FOCUSING ON A POSSIBLE FAULTY NH SPEED SENSOR.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.