As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF AND THE LANDING GEAR RETRACTED, THE PILOT NOTICED THAT THE GEAR UNSAFE LIGHT ILLUMINATED AND THEN WITH IN A FEW SECONDS HIS GEAR INDICATED DOWN AND LOCK. MAINTENANCE INVESTIGATED THE PROBLEM AND FOUND A SMALL HOLE IN A HARD LINE THAT RELEASED THE HYDRAULIC PRESSURE ALLOWING THE GEAR TO EXTEND. HARD LINE WAS REPLACED AND NO FURTHER DEFECTS WERE NOTED.