What was found
ON FLAP EXTENSION, "L/E FLAP DISAGREE MSG" ILLUMINATED- NO ROLL TENDENCY, QRH PROCEDURE FOLLOWED. RETURNED FLAPS TO NORMAL CONFIG. ON SUBSEQUENT EXTENSION FLAPS, EXTENDED NORMALLY. GAGE INDICATOR APPEARS TO JUMP BETWEEN FLAPS 1 AND FLAPS UP. (ACCOMPLISHED FLAP/SLAT PRIMARY AND ALTERNATE SYS CHECK IAW AMM 27-81-00. PRIMARY CHECKS OK. ALTERNATE CHECK FAILED,VERY SLOW TO EXTEND INBD SLATS. REPLACED ELECTRIC MOTOR, FOR INBD POSITION, IAW AMM 27-81-11. ACCOMPLISHED ALTERNATE SYS CHECK, ALL CHECKS GOOD, NO FAULTS. INSTALLATION REQUIRED USING ADAPTER PLATE IAW AMM 27-81-11)