Cessna 402/402C/B379 Businessliner/Utiliner
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Security; Flight Deck / Cabin / Aircraft Event Other / Unknown
Flight Crew Overcame Equipment Problem
Aircraft
During the landing flare after a 1 hour 25 minute flight the top half of the cabin door opened. Continued roll out no other issues.
The Captain of a Cessna 402 reported that the top half of the cabin door opened.