Some more details from a South African news source:
The Equipment and Navigation Accessories (ENA) door of the MD 11 freighter is high up on the aircraft, not easily entered from the ground, and almost impossible to open midair, according to aviation experts who have seen the American freighter at Harare International Airport after it landed “during an emergency” on Sunday.
...Workers from the National Handling Co, according to information in the aviation world in Harare, went to attend to the plane and noticed blood high up on the plane, near the ENA door.
They were allegedly told it was caused by collision with a bird.
But drops of blood were still coming from that door area, and state security officials stationed at the airport insisted it be opened.
“So the engineer from the plane, for some reason put on latex gloves and opened the door which is quite high up the aircraft, and thwack, a fully clothed body of a black man fell out,” said an aviation insider.
Everyone around the plane was shocked and several noticed that there were burns to the dead man’s head, probably from ducts inside the ENA compartment. The dead man had no identification on him.
His body remained hanging out of the plane on the ground until Zimbabwe Republic Police arrived to take it away.
There are suspicions and speculation in aviation circles in Harare now that the US crew may have tried to dump the body during the flight from Munich, Germany, but could not open the ENA door from inside the aircraft over Mozambique because of pressure, and wanted to refuel in Harare and somehow dump the body after take off from Harare International.
The dead man is being investigated in Harare, but there are no qualified pathologists left in Zimbabwe.
Some say the US pilot is in detention, but informed sources in Harare say the four US airmen are in Meikles, a five-star hotel in central Harare.
Mystery deepens over body on plane | IOL