The captain of a bombardier dhc-8-202 reported that during cruise the #2 engine torque surged 22%.

Attributes
ACN	1411088
Time
Date	201612
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Aircraft 1
Make Model Name	Dash 8-200
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Propeller Control
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy

Narrative:

While in cruise at 14;000 feet; the #2 torque surged 22%. We immediately reduced the torques on both engines to approximately 88% and monitored the fluctuation. When set back at 88%; the #2 torque continued to fluctuate between 88 and 93%. I contacted dispatch and maintenance over the phone; and they asked us to divert. We advised ATC and diverted as requested.

Original NASA ASRS Text

Title: The Captain of a Bombardier DHC-8-202 reported that during cruise the #2 engine torque surged 22%.

Narrative: While in cruise at 14;000 feet; the #2 torque surged 22%. We immediately reduced the torques on both engines to approximately 88% and monitored the fluctuation. When set back at 88%; the #2 torque continued to fluctuate between 88 and 93%. I contacted Dispatch and Maintenance over the phone; and they asked us to divert. We advised ATC and diverted as requested.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.