What was found
DURING TAKE OFF AT MAX POWER, ENGINE POWER WAS EQUAL. AT 200 FT AGL RT MOTOR ROLLED BACK TO 60% N1. ANY CLIMB MODE CREATED A 30% N1 SPLIT. VISUAL APPROACH AND VISUAL DOWNWIND WITH AUTOTHROTTLE OFF, COULD KEEP THE THRUST SYMMETRICAL. IMMEDIATELY AFTER TAKEOFF, RIGHT ENGINE THRUST ROLLED BACK 35-PERCENT. DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. FOUND PS3 SENSE HOSE WITH CHAFED WITH A HOLE. FOUND CHAFING AGAINST LOWER STARTER DUCT. REPLACED THE HOSE IAW AMM 72-00-00-200-026-A. ACCOMPLISHED ACCEL AND POWER ASSURANCE CHECKS IAW AMM.