As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THE LEFT MAIN LANDING GEAR DID NOT EXTEND. THEY HAD TO MANUALLY EXTEND THE GEAR. FLIGHT LANDED WITHOUT FURTHER INCIDENT. AN EMERGENCY WAS DECLARED. MAINTENANCE JACKED AIRCRAFT AND REPLACED GREASE FITTINGS. LUBRICATED LEFT MAIN LANDING GEAR. PERFORMED OPERATIONAL TEST AND MANUAL EXTENSION TEST OF ALL GEAR. NO DEFECTS NOTED. LOWERED AIRCRAFT REF AMM 07-11-11-21-11, 32-32-00 AND 32-34-00.