FAULTY MOTOR TEST FLIGHT

This is a test flight while I was tuning the PID (proportional-integral-derivative) error controller on the Arduino. There were two things to note, one is the large oscillations, and the right-rear (red arm side is the front, white arm side is the back) consistently climbed slower than all the other motors in multiple tests. I checked the gyroscope readings, as well as the transmitter/receiver readings, and they are fine. This leads me to believe that the motor is faulty and I will have to replace it.