In addition, FRCE is now able to keep a steady flow of
main rotor blade repair work in the blade shop, Peedin said.
"This condition, if not detected and corrected, could lead to further crack propagation, possibly resulting in
main rotor hub failure and consequent loss of the helicopter," Easa warned.
Our ADs removed the various sub-assemblies (four spindle assemblies, the bifilar weight assembly, dampers, and the
main rotor head accumulator).
Witness reports say that the helicopter's aft rotor broke and hit the
main rotor seconds before it dived into the sea.
At 10-20 pm thick, Durotect P dark grey PTFE coating reduces friction and provides anti-wear protection of
main rotor bearings by promoting sliding capacity of bearing outer ring.
It was also revealed that the failure caused the
main rotor to detach and sever the fuselage.
The action is believed to have reduced the
main rotor's rotation, causing the aircraft to crash.
Opening the inquest, the coroner said: "We shall hear that as Puma Two descended to land its
main rotor blades came into contact with Puma One's
main rotor blades.
The coroner said: "We shall hear that as Puma Two descended to land, its
main rotor blades came into contact with Puma One's
main rotor blades.
"XW218 then tried to land next to XW211 but its
main rotor blades hit those of XW211."
Probably the largest closed die titanium forging made in this country to date is a 775-lb forging made for the
main rotor for the Sikorsky Aircraft CH53A Marine Assault Helicopter.
In the fourth month of the program (scheduled to run from fiscal 2004 to fiscal 2010), we experienced shortages in some of our major components: main transmissions, tail rotor gear boxes, intermediate gear boxes, and
main rotor swash plates.
Enstrom contacted this company in 2000 seeking a
main rotor damper with improved damping performance characteristics, reduced scheduled maintenance and increased service life.
Some of the ways of reducing noise levels generated by flying helicopters include the reduction of the number of revolutions of the main and tail rotor, active control of the
main rotor blades, replacement of the classical tail rotor by the rotor of the Fenestron form or NOTAR (no tail rotor).
