N127TS

HISTORY OF FLIGHT

On February 14, 2010, about 1505 mountain standard time, a Eurocopter Deutschland GmbH EC135 T1 twin-engine turbine-powered helicopter, N127TS, lost control and impacted terrain near Cave Creek, Arizona. The pilot and four passengers were fatally injured. The helicopter was substantially damaged. The helicopter was registered to Services Group of America Inc. (SGA), of Scottsdale, Arizona, and was operated under the provisions of 14 Code of Federal Regulations Part 91 as a personal cross-country flight. Visual meteorological conditions prevailed at the time of the accident, and no flight plan was filed. The flight departed the Whispering Pines Ranch, Parks, Arizona, about 1430 and was destined for Scottsdale Airport (SDL), Scottsdale, Arizona.

SGA personnel reported during postaccident interviews that the helicopter made frequent trips between SDL and the Whispering Pines Ranch and that the helicopter had arrived at the ranch on February 12, 2010. In a statement submitted to the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), the ranch foreman indicated that he had spoken to the helicopter owner while the helicopter was en route to the ranch on February 12. He was not present when the helicopter arrived and did not know who was on the helicopter when it arrived other than the pilot and owner, but he recalled helping the pilot put the helicopter in the hangar after its arrival.

In a postaccident interview with the IIC, the ranch foreman reported that the helicopter was scheduled to return to SDL on the day of the accident. The foreman stated that, on the morning of the accident, the pilot, four passengers, and two dogs arrived at the helicopter hangar for the flight to SDL. The foreman revealed that he placed the passenger’s personal items on the ground outside of the baggage compartment, which was located at the rear of the helicopter; he said that the pilot always loaded the baggage compartment himself. The foreman reported that after the pilot had completed loading the helicopter and doing his preflight inspection, he entered the helicopter, sat in the right front cockpit seat, and started both engines. The foreman added that he then assisted the adult female into the rear cabin area, where she occupied the left rear aft-facing seat. Subsequently, a male passenger boarded the helicopter and sat in the right rear forward facing seat. This was followed by a small dog that occupied the left rear forward-facing seat directly across from the female passenger and a larger dog that was positioned on the floor between the left rear aft-facing and forward-facing seats.

The foreman reported that after the male and female passengers and the two dogs were on board, he closed the right passenger door and ensured that it was locked. The foremen further reported that he moved forward to a position that was immediately outside of the right front pilot's position. He observed the helicopter owner and his 5-year-old, 42-pound daughter walk around in front of the helicopter and board the helicopter from the left forward cockpit door where they both occupied the left front cockpit seat, with the small girl positioned on her father’s lap. When asked how frequently the child occupied the left front cockpit seat with her father, the ranch foreman replied "occasionally." The foreman stated that he could not tell if either the helicopter owner or the child were secured and restrained in the helicopter. The foreman revealed that on previous flights, the helicopter owner had strapped his daughter in on top of him. He said that after everyone was on board, he closed the right passenger door and ensured that it was locked and secured. He said he then went forward to the right front cockpit window area, looked at the pilot, who had his shoulder harness and seatbelt on, and motioned to him that the right passenger door was secured and the helicopter was ready for departure. The foreman indicated that he then proceeded away from the helicopter to his pickup truck, which was positioned about 90 degrees to the right (west) of the helicopter, which was oriented to the south. The foreman said that from his truck, he watched the helicopter lift off, ascend to about 100 to 150 feet, then make a 180 degree turn to the north and begin forward flight, after which the helicopter departed to the northwest.

Several witnesses to the accident were either interviewed by or submitted written statements to the IIC.

Witness #1, who was located on the helicopter's flightpath and was about 1,385 feet north of the accident site, reported that while facing east, he heard two pops. The witness stated that he subsequently looked to the southeast where he estimated the helicopter was about 300 feet above ground level (agl); at the same time, he observed blade debris separate from the rear of the helicopter. The witness added that the helicopter then turned to the west before going inverted and appeared to go straight down. The witness added that the main rotor blade was making a loud clapping sound.

Witness #2, who was located about 500 feet west of the helicopter's flightpath and was about 2,000 feet north-northwest of the accident site, reported that he heard the helicopter approaching from the north and that the engine was cutting out; he described it as popping a couple of times. The witness stated that he observed the helicopter in a rotation but could not indicate in which direction. He further stated that it went around in a circle two times and then suddenly went down in a steep angle of about 30 degrees while cork screwing. The witness added that he did not observe any debris separate from the helicopter.

Witness #3, who was in line with the helicopter's flightpath and was about 2,350 feet due north of the accident site, stated that he initially saw the accident helicopter when it was about 1 mile north of his position and that it sounded perfect when he first sighted it. The witness reported that, about 10 seconds later, he heard what sounded like two small pops, followed by the helicopter making roaring noises. He said he then observed two flashes on the top of the main rotor. The witness stated that the helicopter started spinning and losing altitude and that it spun at least three times; he indicated that he then heard the engine cut out and make a big pop. The witness added that the tail of the helicopter went down, the nose went up, and then the aircraft fell tail first. In a follow-up interview, the witness reported seeing the helicopter spiral in a circular motion towards the ground and then rapidly gain altitude before it flipped upside down and spiraled nose first into the ground.

Witness #4, who was inside of his home and was about 1,250 feet east southeast of the accident site, reported that he heard a loud and unusual sound. The witness stated that he then went outside and observed the helicopter go straight down from about 200 feet before it went out of view.

Witness #5, who was about 500 feet west of the helicopter's flightpath and was initially in his house about 1,000 feet north-northwest of the accident site, stated that he first heard a rotor noise but that the noise changed, and then he heard a pop, followed by popping and banging sounds for a few seconds. The witness reported that he then went outside and observed the helicopter go down. He described the descent as a nose dive, estimated to be at about an 80 degree nose-down attitude before it went out of sight.

Witness #6, who was about 650 feet east of the helicopter's flightpath and was about 2,000 feet north-northeast of the accident site, reported that he heard a popping sound. The witness stated that he observed the helicopter when it was about 400 feet agl moving to the south and that he heard it making popping sounds about every 15 to 20 seconds. The witness stated that he observed the helicopter make four circles in a level, clockwise direction before it went down and out of site.

Witness #7, who was at the same location as the sixth witness, stated that he saw the helicopter overhead as he was looking to the west. The witness reported that he heard a popping sound every 15 to 20 seconds and then observed the helicopter rotate clockwise two or three times, then nose down slightly. The witness added that the helicopter then rolled to the left, went nose down, rolled to the right nose down again, and impacted the terrain.

Witness #8, who was about 1,000 feet west of the helicopter's flightpath and located about 1,500 feet northwest of the accident site, reported that he noticed the helicopter as it approached from the north and that, after a few seconds, he heard a loud pop and observed the helicopter spinning and losing altitude. The witness added that he observed the helicopter make several rotations before going out of sight; the witness was not certain of the direction of the rotations.

Witness #9, who was about 3,000 feet west of the helicopter's flightpath and was about 3,300 feet west-northwest of the accident site, reported that he observed the helicopter when it was traveling from north to south; he estimated it was about 1/2-mile east of his position. The witness reported hearing what he described as a noise like the engine was rapping and that the helicopter was maybe 300 to 400 feet high. The witness added that when the helicopter was about one-half mile east of his residence, there was a system failure of some kind, which made a loud noise with parts observed separating from the helicopter. The witness stated that at this time, the aircraft made 3 or 4 clockwise rotations, followed by the nose of the helicopter nosing over between 25 to 45 degrees, after which the helicopter disappeared from sight.

Witness #10, who was about 1.34 miles west-southwest of the main wreckage site, reported in a statement submitted to the IIC that she initially became aware of the helicopter because of the noise it was makin...