As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR FAILED TO RETRACT, NO RESPONSE TO LANDING GEAR POSITION, EMER GEAR EXTEN PROC USED TO VERIFY GEAR DOWN AND LOCKED DID NOT BLOW BOTTLE. FOUND LANDING GEAR CONTROL HANDLE PIN RETAINER RING HAD COME OFF THE PIN CAUSING PIN TO FALL AND HANDLE TO COME OFF, REPLACED LANDING GEAR CONTROL HANDLE WITH NEW AND INSTALLED NEW PIN, SPRING, AND STOP IN LANDING GEAR CONTROL HANDLE. AND REPLACED GEAR UP SWITCH, OPS CHECK WITH MULTIPLE GEAR SWINGS GOOD.