What was found
FLT 486 - MEX-SLC - AIRCRAFT RETURNED, WHEN SLAT RETRACTED, THE LIGHTS SLAT DISAGREE CAME ON AND 280 KTS THE OVERSPEED ALARM WAS ACTIVATED. SPEED WAS REDUCED BELOW 280 AND AFTER 3 MINUTES LIGHT WENT OFF. IAW THE INSTRUCTIONS OF SHIFT FOREMAN AIRCRAFT RETURNED TO FLIGHT. IN THE HANGAR, PERFORMED A BITE TO THE PROXIMITY SWITCH AND ELECTRONIC CONTROL PROXIMITY SWITCH WAS REPLACED IAW MM 32-60-04, ALL CORRECT. (M)