Their Operations Manager raised the alarm on Wednesday asking for help to rescue the driver who had been stuck in the waters from 10 am.
The call prompted the trust to send two of its aerial units Taru Carr-Hartley and Roan Carr-Hartley for the rescue mission.
"They could immediately spot the breached truck, dwarfed by the angry river. As they flew closer, they were relieved to see the driver, still hanging on" the trust added.
On arriving at the scene, the trust says the pilot flew the helicopter down near the raging waters as one of them slowly stepped onto the tanker to hold the hand of the truck driver.
In another rescue mission in December 2022, Roan Hartley, the pilot rescued a four-year-old boy who went missing for almost a week while herding cattle with his brothers.
The boy went missing in Asa village, which borders Tsavo East National Park, on November 28, 2022, and was rescued on December 4 by the pilot using a helicopter
The Trust is an organisation that operates an orphan elephant rescue and wildlife rehabilitation program.