Phantom I is not staying stationary

[stevefromsd]

Help!

 

[Bravox]

Are you Flying on GPS mode ? if you actually on GPS mode Check the IMU Calibration on the software assistant also do a compass calibration

 

[stevefromsd]

I flew it twice a couple of days ago in a dusty area and I am wondering if one of the motors has slowed down and is not rotating at the same speed as the other rotors.