As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ACFT EXPERIENCED AN AUTOTHROTTLE HUNTING CONDITION WHEN IN CRUISE AND TRYING TO HOLD A CONSTANT AIRSPEED. AUTOTHROTTLE HUNTING RESULTS IN OSCILLATION OF THE ENGINE PARAMETERS, ENGINE PRESSURE RATIO, SPOOL SPEEDS, TURBINE GAS TEMPS. MFGS ARE ANALYZING THE IMPACT OF THE A/T HUNTING BEHAVIOR ON ENGINE COMPONENTS.