By Benson Jacob BUKOBA, Tanzania (Reuters) – When the waters of Lake Victoria started gushing into the cabin of Flight PW494, passenger Mectrida Samuel knew she had to act fast. Around her, others were frantically trying free themselves and keep above the fast-rising water. “We had a big crash and I immediately started seeing water enter the plane. Passengers started to struggle to rescue themselves,” Samuel said, describing the moments after the Precision Air flight to Bukoba plunged into the lake in northern Tanzania. “The only thing that helped me survive was that I managed to remove my sea…