What was found
PILOT REPORTED AFTER PUTTING THE GEAR SELECTOR IN THE DOWN POSITION, THE GEAR WOULD NOT EXTEND, AFTER CYCLING GEAR SELECTOR GEAR WENT DOWN, AC RETURNED TO BASE. ON TROUBLESHOOTING, THE MECHANIC SELECTED DOWN AND IT FAILED TO EXTEND, AFTER TAPPING ON TOP OF RELAY THE GEAR WENT DOWN. PROBABLE CAUSE AT THIS TIME IS UNKNOWN. INSTALLED NEW AND IMPROVED RELAY IAW DATE CODE. (K)