As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF WHEN SELECTING GEAR UP. THE NOSE LANDING GEAR DID NOT RETRACT. GOT AN AMBER GEAR DISAGREE NOSE CAST MESSAGE. AND A HASHMARK DISPLAY FOR THE NOSE GEAR AND THE GEAR CIAS WINDOW CORRECTIVE: PERFORMED NOSE LANDING GEAR SHOCK STRUT RE-PACK PERFORMED OPS/LEAK CHECKS OF NOSE LANDING GEAR SHOCK STRUT WITH NO DEFECTS NOTED AT THIS TIME OPS CHECKS GOOD WORK DONE REF CESSNA CE-680A CMM 32-20-01