As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, THE LANDING GEAR WOULD NOT RETRACT. 1 MINUTE LATER THE WOW MISCOMPARE AMBER CAS MESSAGE ILLUMINATED AND REMAINED ON UNTIL 30 SECONDS AFTER LANDING. JACKED AC, PERFORMED NUMEROUS GEAR SWINGS WHILE MONITORING CDMU. UNABLE TO DUPLICATE DISCREPANCY, CHECKED ALL LANDING GEAR SQUAT SWITCH FOR PROPER RIGGING. ON FINAL GEAR SWING, GEAR HANDLE WOULD NOT GO UP. ADJUSTED NOSE GEAR SQUAT SWITCH IAW MM CHAP 32-60-00 GROUND UP'S CHECKED GOOD.