What was found
ON FLAP RETRACTION THE L/E FLAP DISAGREE EICAS MESSAGE ILLUMINATED. EXCESSIVE TORQUE FORCES IN THE LE SLAT DRIVE SYSTEM INITIATED A LE SLAT DISAGREE FAULT WHICH WAS DETECTED BY THE FLAP/SLAT ELECTRONIC UNIT (FSEU) LE SLAT MOVEMENT IS AUTOMATICALLY INHIBITED BY HYDRAULIC BYPASS TO PREVENT DAMAGE TO ASSOCIATED LE SLAT DRIVE COMPONENTS. THE NR 6 AND 15 LE SLAT DRIVE ROTARY ACTUATORS WERE FOUND TO HAVE TRIPPED TORQUE OVERLOAD INDICATORS. THE NR 6 AND 15 LE SLAT DRIVE ACTUATORS WERE REPLACED. THE DRIVE TRANSMITTER IN THE LE SLAT POWER DRIVE UNIT (PDU) WAS ALSO REPLACED.