Aircraft flap motors control the angle of the aircraft flaps. Rotating these flaps up and down adjusts the drag and lift on the aircraft, which improves takeoff and landing. Aircraft may have a single flap motor that operates both flaps, or may have multiple flap motors.
Occasionally the aircraft flaps will get stuck in the up or down position due to freezing weather or a small worn spot in the flap motor armature. If this happens, you may be able to temporarily fix the issue by allowing the flap to defrost or rotating the flap motor shaft by hand. But these temporary repairs should only be considered in an emergency situation. The sooner you have your flap motor overhauled, repaired, or exchanged, the better your aircraft performance.