What was found
AIRCRAFT RETURNED TO PLATFORM DUE TO, AFTER START ENGINES & DURING FLAPS EXTENSION, THE LT & RT FLAP INDICATION SHOWN ASYMMETRY WITH LEVER DID NOT COMMAND. PERFORMED THE FIM 27-51 TASK 801 PROCEDURE, SHOWING FAILURE CODE 27-52260 & THE FIM 27-51 TASK 820 PROCEDURE WAS PERFORMED, DETECTING THE FLAPS POSITION TRANSMITTER T428 WITH FAILURE. ACFT WAS SENT TO THE HANGAR & REPLACED THE FLAPS POSITION TRANSMITTER T428 IAW AMNM 27-58-01 & FIM 27-51 TASK 820 PROCEDURE WAS PERFORMED, TESTED CORRECT.