As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, LANDING GEAR WOULD NOT RETRACT. SNOW AND SLUSH ALL GROUND SURFACES. RETURNED TO DEPARTURE. JACKED AC AND ACCOMPLISHED GEAR SWINGS, NO DEFECTS WERE NOTED ACCESSED GEAR SELECTOR VALVE IN NOSE WHEEL WELL AND CHECKED FOR FREEDOM OF MEASUREMENT OF LINKAGE, NO DEFECTS WERE NOTED. GAINED ACCESS TO TERMINAL BLOCK (JK) AND RANG OUT LT WEIGHT ON SWITCH (JP) AND FOUND SWITCH RINGING OUT TO AIRFRAFE GROUND. REMOVED UNSERVICEABLE LT WOW SWITCH. INSTALLED A NEW SWITCH OPERATIONAL CHECK WAS FOUND TO BE SATISFACTORY.