What was found
WING SLOT LIGHT ON AFTER TO, FLAPS UP, AND BUFFET. UNABLE TO COMPLETE WING SLOT LIGHT ON ABNORMAL PROCEDURE CONDITION NR 1. NOTE: FLAP INDICATOR REMAINS AT 0 FLAP HANDLE IS PLACED TO 0 DEGREE OR 25 DEGREE FLAP POSITION. CHANGED WING FLAP CONTROL VALVE IAW MM AND PERFORMED RIGGING AND ADJUSTMENT OF WING SLOTS AND WING FLAP IAW MM, STEP D, AND TESTED IAW MM, STEP C.