As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE MOTORS HAVE HIGH RESISTANCE BETWEEN THE BRUSHES AND ARMATURE OF THE MOTOR. THIS CAUSES THE MOTOR TO STICK INTERMITTENTLY, CAUSING A FALSE ATTITUDE DISPLAY IN THE COCKPIT. CREW REPORTED ON CLIMB OUT, THE ADI DISPLAYED AN ATTITUDE FLAG. PITCH AXIS DID NOT RESPOND TO THE ATTITUDE CHANGE.