As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STL - AFTER TAKEOFF, LANDING GEAR HANDLE WOULD NOT RAISE ABOVE OFF POSITION. ACCOMPLISHED LANDING GEAR HANDLE LOCK CHECKLIST AND RETRACTED LANDING GEAR. FOUND NOSE LANDING GEAR TORQUE LINK PIN MISSING, MFG P/N 53173. INSTALLED NEW NOSE GEAR TORQUE LINK PIN. LANDING GEAR CHECKS NORMAL.