As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 4023 - SHORTLY AFTER TAKEOFF WHEN THE LANDING WAS RETRACTED, BOTH THE LEFT AND RIGHT MAIN LANDING GEAR INTRANSIT LIGHTS REMAINED ILLUMINATED. AIRCRAFT RETURNED TO THE FIELD, LANDED WITHOUT FURTHER INCIDENT. PIT MX CLEANED AND LUBRICATED THE MAIN LANDING GEAR UPLOCK ROLLER IAW MM 32-00-00 AND STD MX PRACTICES, CHECK FLIGHT WAS SATISFACTORY. AIRCRAFT WAS THEN RETURNED TO SERVICE. (M)