Repairing the Ar.drone Parrot motor. Noticed that the motor was moving within the mount, caused the rotor shaft to seize ... not good when flying ! Disassembled using excellent Ar.Drone video instructions ... http://ardrone.parrot.com/parrot-ar-drone/usa/repair-your-ar.drone . The motor end cap (closest to the gear) had popped off (strange). So, clamped it all back together very gently with a small bench vice. Reassembled and tested okay ... 3 batteries and 40+ minutes worth. Whew !