As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR WOULD NOT RETRACT AFTER TAKEOFF. CHECKED OPERATION AT ALL PINS WITH OHMMETER AT NOSE AND MAIN GEAR SQUAT SWITCHES. CHECKED GOOD. JACKED A/C. CHECKED GEAR FOR FULL EXTENSION. FOUND NOSE GEAR NOT FULLY EXTENDING. SERVICED NOSE STRUT WITH HYDRAULIC FLUID AND NITROGEN PER CESSNA 750 MAINT MANUAL 12-10-38. CYCLED GEAR SEVERAL TIMES. OPERATION IS GOOD AT THIS TIME.