What was found
AIR TURNBACK, DURING CLIMBOUT NR 1 ENGINE BEGAN SURGING N1 DROPPED FROM 85.9 PERCENT TO 81 PERCENT. REMOVED AND REPLACED NR 1 ENGINE MEC PER MM.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIR TURNBACK, DURING CLIMBOUT NR 1 ENGINE BEGAN SURGING N1 DROPPED FROM 85.9 PERCENT TO 81 PERCENT. REMOVED AND REPLACED NR 1 ENGINE MEC PER MM.