"There's a lot of trust that we put in our loadmasters," said Capt. Kenneth Pedersen, 774th EAS aircraft commander, in the same story. "They're pretty autonomous ... making sure the cargo is secure and loaded correctly."
Other possible contributors to the crash include malfunction of the flaps on the wings, or some other flight-control system or even a massive loss of power, Rosenberg said.
But Rosenberg said he considered the last possibility to be the least likely, given the redundancy built into the four-engine jet. "It's a fantastic plane," he said.
The video leaves no doubt that, whatever the cause, the plane wound up flying too slow to generate sufficient lift on the wings to keep the airplane aloft, he said.
"In all my years of being involved in aerospace and piloting and litigation, I have never, ever, ever seen such a dramatic crash sequence as this one," he said. "It really is nauseating to look at, a monster like that falling out of the sky. That's not supposed to happen."
Rosenberg predicted that the cockpit voice recorder and digital data recorder will provide investigators with the answers to the questions they are asking.
In its statement, National Air Cargo said it "will not speculate as to the cause of the accident," and that it was fully cooperating with authorities as the investigation continues.