What was found
IN NORMAL SLAVE MODE, DIRECTIONAL GYRO DID NOT FOLLOW HEADING CHANGE. ONLY IN FAST SLAVE. REPLACED WITH SERVICEABLE UNIT.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
IN NORMAL SLAVE MODE, DIRECTIONAL GYRO DID NOT FOLLOW HEADING CHANGE. ONLY IN FAST SLAVE. REPLACED WITH SERVICEABLE UNIT.