What was found
(CAN) ON APPROACH, THE FLIGHT CREW SWITCHED THE FLAP SYS INTO ALTERNATE MODE & NOTED THE LE SLATS DEPLOYED TO FULL EXTEND POSITION BUT TE FLAPS WOULD STILL NOT DEPLOY PASSED 5 UNITS. THE ACFT MADE A SAFE LANDING UNDER THIS CONFIGURATION. CARRIED OUT AN FSEU BITE CHECK & DISCOVERED THE RT FLAP POSITION TRANSMITTER TO BE AT FAULT CAUSING THE INITIAL FLAP ASYMMETRY. THE RT FLAP POSITION TRANSMITTER WAS SUCCESSFULLY REPLACED IAW AMM 27-58-01. FURTHER INVESTIGATION WAS CARRIED OUT REVEALING THE STANDBY FLAP ELEC MOTOR TO HAVE FAILED PREVENTING THE FLIGHT CREW FROM EXTENDING THE TE FLAPS PASSED 5 UNITS IN ALTERNATE CONFIGURATION. THE ALTERNATE FLAP ELEC MOTOR WAS SUCCESSFULLY REPLACED IAW AMM 27-51-53 & TESTED UNDER AMM 27-51-00-860-80. ACFT RETURNED TO SERVICE. PLEASE NOTE THIS SDR IS TARGETING FAILURE OF THE ALTERNATE FLAP ELEC MOTOR. FOLLOW UP TO BE ADDED WHEN TEAR DOWN INFORMATION BECOMES AVAILABLE.