What was found
AFTER TAKEOFF, GEAR HORN SOUNDED UPON RETRACTION. AT THIS POINT, IT WAS NOTICED THAT THE FLAP INDICATOR SHOWED FULL DOWN DEFLECTION, HOWEVER, FLAPS WERE RETRACTED. FLAPS INOP AFTER THIS. SUSPECT LOGIC BOX FAILURE. CLEANED FLAP TRANSMITTER POTENTIOMETER SEAL POT AND TERMINAL STRIP. FLAPS SYSTEM OPS CHECK GOOD.