As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT GEAR ON LT SIDE WOULD NOT RELEASE. FLIGHT CREW HAD TO PREFORM EMERGENCY EXTENSION AND PULL G`S TO RELEASE GEAR. TROUBLE SHOOT SYSTEM AND FOUND LEFT GEAR UPLOCK WOULD NOT RELEASE GEAR. REPLACED UPLOCK ASSY. RIGGING WAS OUT OF LIMIT. PROBABLE CAUSE IS DESIGN OF UPLOCK ASSY INSTALLATION. RECOMMENDATION IS TO C/W SB.