The investigative body looking into the cause of
the crash have released their report detailing the
events which took place prior to a fatal accident
The Air Accidents Investigation Branch have
revealed the cause of the helicopter crash that
claimed the lives of five people, including
Leicester City chairman and owner Vichai
Srivaddhanaprabha.
The helicopter picked Srivaddhanaprabha up in
the centre of the pitch at Leicester's King Power
Stadium after their game against West Ham, as
it often did, and took off before losing control
shortly after and crashing down in a car park
just outside the stadium before becoming
engulfed in flames.
The other four victims were Srivaddhanaprabha's
staff Nursara Suknamai and Kaveporn Punpare,
as well as pilot Eric Swaffer and his partner
Izabela Roza Lechowicz.

The report explains that a pin had come loose
due to a "build-up of black grease", causing the
pilot's pedals to become unable to control the
tail rotor, leading to a loss of control of the
aircraft and subsequent crash.
"The tail rotor actuator control shaft became
disconnected from the actuator lever
mechanism," the report stated .
"The disconnection stopped the feedback
mechanism for the tail rotor actuator from
operating and the tail rotor actuator from
responding to yaw control inputs.
"This resulted in an uncontrollable right yaw.
"Sufficient force and torque had been applied to
the castellated nut on the actuator end of the
control shaft to friction weld it to the pin carrier
and to shear the installed split pin.
"Whilst the shaft was rotating and a yaw control
input was applied, the shaft 'unscrewed' from
the nut, disconnecting the shaft from the
actuator level mechanism, and causing the nut
to become welded to the pin carrier."
The incident was met with an outpouring of
grief from around the world and there were
several moving tributes to the memory of a
chairman who took Leicester to the unlikeliest
of Premier League titles at odds of 5000/1 in
2016.

Source: https://www.goal.com/en-ng/news/cause-of-leicester-city-helicopter-crash-revealed-by/yjxvl3rv4wzd1az0pz7x2jkvt