As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
7003-STL-DURING TAKEOFF TO CLIMB, THE LEFT MAIN LANDING GEAR OUTBOARD WHEEL ASSEMBLY DEPARTED THE AIRCRAFT. THE AIRCRAFT LANDED WITHOUT INCEDENT. MAINTENANCE INSPECTED THE LEFT MAIN LANDING GEAR AND AXLE ASSEMBLY. MAINTENANCE REPLACED THE LEFT MAIN LANDING GEAR AXLE ASSEMBLY, LEFT MAIN OUTBOARD BRAKE ASSEMBLY AND LEFT MAIN OUTBOARD LANDING GEAR WHEEL. INVESTIGATION IS ONGOING TO DETERMINE CAUSES.