As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RDU - FLT 1286 - EN ROUTE - RDU-PHL, THE LEFT MLG WOULD NOT RETRACT AFTER TAKEOFF. THE LANDING GEAR WAS RECYCLED, BUT THE LEFT MLG STILL DID NOT RETRACT. THE FLIGHT RETURNED TO THE FIELD AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE LT MLG RETRACTION ACTUATOR. OPS AND LEAK CHECKED OK. (M)