# SDR COEA2016120553801

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 5, 2016
- Submitted: December 8, 2016
- Operation: Air carrier
- Aircraft: [N801FX](https://openairdocs.org/aircraft/N801FX), registered now
- Make and model: Aerosp ATR 72-212
- Registry model: [Aerosp ATR 72-212](https://openairdocs.org/model/aerospatiale-atr-72-212) (OpenAirDocs)
- Aircraft serial: 338
- Aircraft time: 35,663 hours, 39,604 cycles
- System (JASC): [6120 · Propeller Controlling System](https://openairdocs.org/jasc/6120)
- Part: Ovrspeed Limiter
- Part number: 8210161C
- Part serial: 2483604
- Condition: Failed
- Location: Propeller
- Part time: 4,653 hours, 4,058 cycles
- 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/COEA2016120553801

## Discrepancy

DURING CLIMB, THE CREW NOTICED THE NR 1 ENGINE WAS HAVING TORQUE FLUCTUATIONS AND SURGES.  THE CREW ELECTED TO RETURN TO DEPARTURE.  THE AIRCRAFT WAS GROUNDED.  REMOVED AND REPLACED PROPELLER OVERSPEED GOVERNOR. OPS CHECKED GOOD.

---
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.