As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MECHANIC REMOVED NEW RELAY FROM STOCK AND INSTALLED ON AIRCRAFT AND GEAR FAILED TO EXTEND, AFTER TAPPING ON THE TOP OF RELAY GEAR WENT DOWN. MECHANIC THEN INSTALLS ANOTHER NEW RELAY FROM STOCK AND SYSTEM OPERATED NORMAL. PROBABLE CAUSE AT THIS TIME UNKNOWN. (K)