As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF. RED NOSE UNSAFE LIGHT REMAINED ILLUMINATED. FLIGHT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. FOUND ICE ACCUMULATION AROUND BASE OF NOSE GEAR GLAND NUT AND NOSE STRUT DEFLATED. CLEANED ICE FROM AROUND NOSE GEAR AND SERVICED NOSE STRUT TO PROPER LEVELS. OPERATIONAL CHECK OK. AIRCRAFT RETURNED TO SERVICE.