As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON SELECTION OF GEAR DOWN, LT MAIN DID NOT EXTEND FOR ABOUT 20 SECONDS. GEAR THEN WENT DOWN AND LOCKED, GOT THREE GREEN LIGHTS. LUBED GEAR ACTUATORS AND UPLOCK INSPECTED GEAR, PERFORMED SATISFACTORY TEST FLIGHT. ACFT RETURNED TO SERVICE. (W)