As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT MLG LANDING GEAR RETRACTION DID NOT RETRACT - L MAIN GEAR FAILED TO RETRACT. OVERSPEED TO 250 KNOTS. REMOVED LEFT MLG DOWNLOCK SWITCH PART NO: 6-0373-3 SERIAL NO: N/A AND INSTALLED CUSTOMER SUPPLIED NEW PART NO: 6-0373-3 SERIAL NO: N/A IAW CE680 M/M CH 32-30-40. ACCOMPLISHED LEFT MLG DOWNLOCK SWITCH OPERATIONAL CHECK IAW CE680 M/M CH 32-60-00. OPERATIONAL CHECKS GOOD.