Kama msito i have this to say
Relaaaxini tafasali i give an educated explanation of what really happened.
He made a good bird but it lacked power. You could hear and see when the rotors began 'coning' ~ losing speed and he started descending. That was his que to land.
He pulled more collective and slowed the rotors more. As he pulled more collective he overpowered the tail rotors ability to counteract the increased drag of the main blades and then began what's called 'loss of tail rotor effectiveness' LTE is established and unrecoverable at this point.
Lack of proper power for the weight of the craft contributed to Pilot Error. He could have gained forward flight without additional power. The hover requires a lot more power but slowing to a hover to land would have been more of a slide in.
[nilikuwa nmeanza classes kitambo kiasi nikawacha]