As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT SELECTED GEAR DOWN AND NOTHING HAPPENED. LANDING GEAR WOULD NOT EXTEND. FLIGHT CREW EXTENDED LANDING GEAR MANUALLY AND LANDED WITHOUT INCIDENT. MAINTENANCE TECH TROUBLESHOT GEAR SYSTEM AND FOUND THAT THE DYNAMIC BRAKE RELAY WAS INTERMITTENT. PROBABLE CAUSE WAS DUE TO INTERNAL FAILURE WITH RELAY. TO PREVENT RECURRENCE IS INSTALL A NEWER MFG DATE RELAY WHICH IS AN IMPROVED UNIT IAW MFG. (K)