What was found
INABILITY TO MODULATE POWER ON BOTH ENGINES DURING REVENUE FLIGHT, WHILE CLIMBING, BOTH ENGINES DECREASED BY 5 PERCENT N1 UNCOMMANDED. THERE WAS NO RESPONSE TO THROTTLE ADVANCEMENT. THROTTLES WERE RETARDED TO CRUISE SETTING AND AGAIN THERE WAS NO RESPONSE TO THROTTLE ADVANCEMENT. THE EEC`S WERE SET TO MANUAL MODE AND ENGINES RESPONDED NORMALLY. THE TRIP WAS COMPLETED AND AFTER AN A/C POWER RESET, THE ENGINES MADE POWER IN BOTH MANUAL AND AUTO MODES. N1 ROLLBACK COULD NOT BE DUPLICATED ON GROUND. PILOT STATED HE WILL FLY ACFT BACK TO HOME BASE WHERE THE ENGINES DCU`S WILL BE DOWNLOADED.