As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT MAIN GEAR WOULD NOT RETRACT AFTER TAKEOFF. CYCLED GEAR THREE TIMES WITH NO CHANGE. RETURNED TO SMX. INSPECTED LEFT GEAR DOORS SEQUENCE VALVES FOR RIGGING, FOUND GOOD. CLEANED HEAVY GRIME FROM SEQUENCE VALVE. SWUNG GEAR SIX TIMES AND OPS CHECKS GOOD.