The NTSB report says that a vendor tasked with filling up the plane was unclear which kind of fuel to use for the type of airplane and filled it up with the wrong kind.
One of the adults, later identified as Steve Moyer, was dangerously cold as the group paddled the Honker Divide Canoe Route on the Thorne River.
Capital City Fire/Rescue Chief Rich Etheridge says the man suffered a massive head injury.
Photos posted to Facebook on Thursday show a twin-bladed Chinook helicopter carrying the bus away from the remote site it occupied near the Teklanika River, where it attracted numerous tourists who had to be rescued after the book’s publication.
Brown and his mother got lost on a trail Wednesday. She was found injured, but alive on Friday.
Officials say they rescued five Italian tourists from “the Bus” — that’s the old Fairbanks city bus made infamous by Christopher McCandless.
“So, that’s how we got lost. Cause we were trying to catch a fox to show my mom and my dad,” he said.
All four boys who were found huddled in the snow near Nunam Iqua have reunited with their family.
“I see the boat penciled — straight up and down in the air. The bow was straight up in the air, and then it sinks. My heart drops. I tried to do everything I could to get those guys out.”
All four children were bundled together. They had dug a hole in the snow, about a foot deep and three feet in diameter.