What was found
CLT - FLT 276 - CLIMBING THROUGH 12,000 FEET, THE NR 1 ENGINE SURGED, PLUS OR MINUS 7 TO 8 PERCENT N1. CAPTAIN PULLED BACK NR 1 ENGINE TO IDLE, DECLARED AND EMERGENCY AND RETURNED TO FIELD AT CLT. ALL INDICATIONS FOLLOWED N1 AND THE ENGINE SURGED WITH AND WITHOUT AUTO-THROTTLE. FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE NR 1 ENGINE PMC BLUE HARNESS ASSEMBLY AND LEAD. OPS CHECKED PMC AT PART POWER PER MM 71-00-01. OPS CHECK GOOD. (M)