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 TAKEOFF. GEAR HANDLE STUCK IN THE DOWN POSITION. APPEARS TO BE A SQUAT SWITCH ISSUE. JACKED ACFT AND SWUNG GEAR. NO DEFECTS NOTED. SPOKE WITH MX WHO REQUESTED LANDING GEAR CONTROL HANDLE BE REPLACED. REPLACED LANDING GEAR CONTROL HANDLE WITH REPAIRED UNIT CERT NR12-87. OPS CHECKS GOOD. DONE IN REF TO MM 32-30-01.