As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT SELECTED GEAR UP AND NOTHING HAPPENED. STILL INDICATING (3) GREEN LIGHTS LANDING GEAR WOULD NOT RETRACT. MAINTENANCE TECH TROUBLESHOT GEAR SYSTEM AND FOUND THAT THE DYNAMIC RELAY WAS INTERMITTENT. NO RECOMMENDATION AT THIS TIME. (K)