What was found
WHILE IN FLIGHT THE TRANSMISSION CHIP RT CAUTION LIGHT CAME ON. PILOT WAS ON APPROACH TO LAND AT MO916, ACFT HAD JUST BEEN STARTED AND WAS 2 MINUTES INTO THE FLIGHT, APPX SPEED WAS 80 KNOTS AT 400 FT. AFTER LANDING THE ACFT WAS SHUTDOWN AND MX WAS CONTACTED. A SMALL AMOUNT OF PASTE WAS FOUND ON THE RT CHIP PLUG, NO METAL. DRAINED TRANSMISSION AND REPLACED FILTER. PENALTY RAN FOR 1 HOUR, NO FURTHER LIGHTS. RECHECKED RT CHIP PLUG AND FOUND CLEAN. ACFT RELEASED FOR FURTHER FLIGHT.