Didn’t Josh Wheedon do a TV series about that?
Aviation management in Africa is…lax, to say the least. Flying the plane out to a random airstrip, or even a decently flat field, isn’t all that impossible, and it’s not too difficult to disable or change the transponder. A new coat of paint, a faked or copied aircraft registration from a country that never checks or has no real authority, or accepts cash to turn a blind eye… the fact is, planes disappear pretty often out there, and not because they’ve crashed. Business jets are more prone to being hijacked, hidden or simply never registered in some parts of the world than airliners and cargo planes, but Africa is full of old planes of all sorts that developed and developing nations wouldn’t touch with a ten foot pole.