As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO RETRACT LANDING GEAR AFTER TAKE OFF AND THE LANDING GEAR VMO SELECTOR SWITCH IS IN THE LANDING GEAR DOWN POSITION. THE AIRCRAFT WAS GROUNDED. INSPECTED THE AIRCRAFT AND FOUND IN SAFE CONDITION FOR MAINTENANCE FERRY. VERIFIED DIMENSION H WITHIN LIMITS IAW AMM 12-12-32. REMOVED AND REPLACED THE PROXIMITY SENSORS 24GA AND 25GA IAW AMM 32-71-73. OPS CHECKED GOOD. OK FOR SERVICE.