What happened
A four engine heavy jet was instructed by ground control to taxi toward an active runway. The intended taxi route required crossing an active runway; however, ground control issued a command for the aircraft not to cross that specific runway. The aircrew acknowledged this instruction.
The aircraft came to a stop in a southerly orientation on a north-south oriented taxiway that intersected the active runway. During this time, a maintenance utility truck operated by another airline stopped on the east side of a service road that crossed perpendicularly to the aircraft's position on the taxiway.
After ground control directed the aircraft to continue taxiing, the crew began to power up the engines. As the aircraft accelerated, the service truck drove behind it. The vehicle was struck by the jetblast from the aircraft, which caused the truck to roll over two or three times.
Findings
An investigation into the airport's motor vehicle operating regulations handbook and the airline's driver training program determined that the dangers posed by jetblast to motor vehicles were not addressed in the existing training or regulatory documentation.