Slammin, when the motor cuts out like that it is usualy only a couple of possibilities, 1 is the batt is low, second is your pulling too many amps and the ESC or in your case the FET I think it's called is cutting it out, I would suggest if the plane is new first you need to cycle your batt
hook it up and set up the plane to where you can run it at a low speed till the batt is dead then charge it up, do this 3 times and then your batt will begin building a memory and the motor will be getting broke in. there are different ways to break in the brushed motors but in your case it's limited, I would not run it full throttle untill the 3rd cycle and then just for short times, remember your not cooling it when it's static, if this does not solve your prob I would take it back as there may be a prob in the circuit board of the plane
Good Luck and have fun