As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:N/A** DIVERSION ** GEAR WOULD NOT RETRACT AFTER TAKEOFF. COMPLIED WITH QRH. UNABLE TO RETRACT WITH THE OTHER SYSTEM. HANDLE WOULD NOT MOVE PAST THE NEUTRAL POSITION.PREPARED AIRCRAFT FOR JACKS AND GEAR SWING REF 07-11-00. FOUND FAULTY LANDING GEAR CONTROL SWITCH UNIT. REMOVED AND REPLACED LANDING GEAR CONTROL SWITCH UNIT REF 32-31-11. PERFORMED GEAR SWINGS AND OPS CHECKS. OPS CHECKS GOOD. OK FOR SERVICE. IPC: 32-31-08-01B ITEM 50.