Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 102; Flight Crew Total 2571; Flight Crew Type 855
Aircraft Equipment Problem Critical
Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport
Aircraft
This morning while departing we experienced an engine roll back. The FO ran the runway item checklist as I taxied out onto [the] runway. As I started to apply takeoff power all engine indications were normal. Upon reaching close to firewall [I] noticed we [were] not at the usual torque numbers. I then verified the throttle and advanced it full forward. At this point the indications went back to normal and we had reached Vr. We rotated and I instructed [the FO] to watch our torque-meter and notify [me] if it changed at all; and if it did we would be making an immediate turn back to [the] runway. Shortly after passing through 500 ft AGL and in a left turn to a 090 heading he stated that indeed the torque was rolling back. As previously briefed I executed a left turn back to [the runway] and landed without issue.
[Report narrative contained no additional information.]
PC-12 flight crew reported returning to the departure airport after experiencing a power rollback shortly after takeoff.