Sundance Tour Helicopter Crash at Las Vegas and the AStar Hydraulic System
Eurocopter's AStar is the most popular tour helicopter in the United States. But according to some tour operators, the helicopter is dangerous and defective. They use it anyway because it is the most profitable.
No, I’m not making this up.
Problems with the AStar 350?
One of Las Vegas' largest tour operators, Heli-USA, is run by Nigel Turner. Turner is himself a pilot. He operates the largest AStar fleet in the Western United States. And he feels that the design of the AStar's hydraulic sytem causes it to crash. Turner complains that the manufacturer refuses to fix the problems. But, like other tour operators he sticks with the AStar for one simple reason: money. According to a 2008 article in the Star Bulletin:
Turner said that despite the problems with the AStar, it will remai
n the helicopter of choice for his company because it's the only chopper with forward-facing seats that can fit enough passengers to make a tour profitable.
So what exactly do hydraulics and actuators do?
The actuators move the helicopter's rotor blades, allowing the pilot to control the flight of the aircraft. The AS350's hydraulics -- similar to a power steering system in a car -- help move the helicopter's actuators. If the hydraulic system fails, the pilot may find it hard to move the actuators and thus the helicopter can be difficult to control.
While a problem with the hydraulic system can make the helicopter difficult to control, a disconnected or broken actuator will make the helicopter impossible to control. That's what happened in 2007, when an AS350 just like the one involved in this accident crashed in Hawaii, killing four tourists. Days after that accident, Eurocopter issued a Special Airworthiness Bulletin (see below) prompted by two previous fatal accidents, warning of the consequences of loose servo control rod end fittings.
The Sundance Helicpter’s control system
NTSB board member Dr. Mark Rosekind says that the Sundance helicopter climbed and turned erratically just before impact. That's consistent with an actuator problem. And, just hours before the crash, one of the Sundance helicopter's main rotor actuators was replaced. Was the actuator defective? Was it installed incorrectly?
The NTSB has now recovered that actuator from the wreckage site. That's where the investigation will focus.
But given what industry leaders have to say about problems with the AStar’s control system, one has to wonder whether by continuing to use the helicopter the tour industry is simply placing profits ahead of public safety.
n the helicopter of choice for his company because it's the only chopper with forward-facing seats that can fit enough passengers to make a tour profitable.
n between them. By flying over one of the towers the pilot can be assured of avoiding the wires, since no wires are strung higher than the tower itself.
hursday's Blue Hawaiian crash on Molokai
it because of a defect in the design of the electronics that control the fuel flow to the engine.
than Robinson's R44, with it's Lycoming piston engine?
percent power. The R44 is a demonstration of the most reliability that you could ever get from a piston engine; the Robinson R66 and similar light turbine helicopters demonstrate the least reliability that you could ever get from a turbine engine. . .
aviation, off the charts. In fact, with a crash rate that is 6000 times that of commercial airliners, flying an EMS helicopter is the second most dangerous job in America.
accidents, the most recent being the
advising that anyone flying in one of its aircraft should wear fire retardant clothing head-to-toe.
manufacturers are required by regulation to provide a flight manual when it delivers the aircraft to the customer. The manual must be carried in the aircraft at all times thereafter. Therefore, the manual was properly considered to be an aircraft "part." Because the manual at issue was more than 18 years old, GARA applied to protect the manufacturer from liability for any errors.
power company should have marked its wires with orange balls to make them more visible.
ns fewer overall crashes (especially ocean ditchings), but more crashes into mountainsides hidden in the clouds. The number of fatal crashes remained the same.
three crew members on board. According to an article in the
spot of Thursday's accident.
Why, exactly, is the EMS helicopter accident record so bad? As discussed
place in it. On Friday, the NTSB came out with a block-buster
airspace near major airports unless they have first obtained a clearance from air traffic controllers. If a pilot obtains the necessary clearance, controllers will dictate the pilot's path and use radar to monitor the pilot's every move. 
protections of MICRA, because the ambulance company was properly considered a “health care provider.” The ruling extended the umbrella of MICRA's protection from doctors to ambulance drivers, at least when those drivers are licensed as EMT’s.
fuel system and installing it in the new Hueys it produced. The crashworthy system included stronger fuel cells, breakaway fuel lines, and cutoff valves.
Flight Safety Foundation
The Hawaiian Helicopter Tour Industry is Big Business. Each year, more than 1 million people take an aerial tour of Hawaii. That equates to one out of every 10 visitors to the islands. Most of the tours are in helicopters. The business generates more than $200 million annually, and supports countless jobs.
A reader of 