It is not that it refused to take off, the pilot was just conducting what is called a pre-flight hover, especially with such a risky helicopter. Pre-flight hover is always the last chance for the pilot to identify any potential problem while the helicopter is still close to the ground. If everything is OK then the pilots can power up and continue with the flight. But if they sense a problem in engine performance or other issues, they can quickly get back to the ground. Ndiyo sababu bado unaona w