What was found
NUMBER ONE ENGINE SURGES AT HIGH POWER SETTINGS WITH AUTO THROTTLE ON AND OFF. ALSO, SURGE WAS NOTICEABLE WITH AIRCRAFT IN YAW, BUT NOT NOTICEABLE AT LOWER POWER SETTINGS. REPLACED MAIN ENGINE CONTROL, CHECKS OK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
NUMBER ONE ENGINE SURGES AT HIGH POWER SETTINGS WITH AUTO THROTTLE ON AND OFF. ALSO, SURGE WAS NOTICEABLE WITH AIRCRAFT IN YAW, BUT NOT NOTICEABLE AT LOWER POWER SETTINGS. REPLACED MAIN ENGINE CONTROL, CHECKS OK.