What was found
DURING APPROACH AT 5,000 FEET, 160 KNOTS, AND FLAPS AT 20 DEGREES, STALL WARNING STICK SHAKER ACTIVATED. EXECUTED GO-AROUND PROCEDURES AND AN UNEVENTFUL LANDING WAS ACCOMPLISHED ON SECOND ATTEMPT. FOUND CORROSION AT THE LEFT FLAP TRANSMITTER CANNON PLUG. CLEANED PLUG AND OPERATIONAL CHECK OK.