What was found
DURING CRUISE, THE CREW EXPERIENCED A SIGNIFICANT POWER FLUCTUATION ON RT ENGINE AND SHORTLY AFTER LEVELING OFF AT 11,000 FEET AIRCRAFT YAWED TO RT. THE CREW NOTED THE RT ENGINE TORQUE GAUGE NEEDLE INCREASED TO 120 PERCENT, WHILE THE DIGITAL GAUGE SIMULTANEOUSLY DECREASED TO 25-30 PERCENT. THE FLUCTUATION AND YAW TO THE RT OCCURRED TWICE. AFTER ADVANCING THE CONDITION LEVERS TO 100 PERCENT NP, THE RT ENGINE STABILIZED. BOTH ENGINES OPERATED WITHIN NORMAL LIMITS DURING THE REMAINDER OF THE FLIGHT. AN EMERGENCY WAS DECLARED AND AIRCRAFT LANDED SAFELY. MAINTENANCE REMOVED AND REPLACED THE RT TORQUE PICK-UP PROBE. OPERATIONAL CHECKS GOOD. AIRCRAFT OK FOR SERVICE. (M)