I can’t find my plane I bought in my hanger (GTA V Story Mode)

Your plane (Besra) should be in the airfield that you own, there is a glitch that sometimes sends the plane to Sands Shores Airfield. You might even find both of your planes there. Other players have also said that sometimes it takes 10 minutes to 3 hours for your plane to "arrive" almost all players says that their planes eventually arrived (or they stumbled on it at the sandy shores one) All I can say is just be patient and it should come... eventually. If the plane that you bought crashes, it will end up in the airfield it arrived in.

Good Luck on getting your plane ~Kingsley

If it will not show up in the hangar, just go inside it and press E (pc). Then a list of purchased aircrafts will show. Simply select and confirm .... There you go.