As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT DEPARTED, ON CLIMBOUT THE LANDING GEAR WOULD NOT RETRACT. ACFT RETURNED TO DEPARTURE. LANDING WAS UNEVENTFUL. MX INSPECTED LANDING GEAR AND FOUND NLG SQUAT SWITCH BRACKET DETACHED FROM TORQUE KNEE. BRACKET ATTACH SCREWS HAD FAILED. SUSPECT ICE PREVENTED NORMAL ACTUATOR ARM MOVEMENT WHICH RESULTED IN FASTENER FAILURE. REINSTALLED SQUAT SWITCH BRACKET AND COMPLETED RETRACT/EXTENSION TESTS. ALL OPS NORMAL.