Metal Fatigue Ruled Probable Cause Of 2005 Bell 206B Accident | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Most Recent Daily Airborne

Airborne On ANN

Airborne On YouTube/Hi-Def/Mac Friendly

Monday

Airborne 01.19.15

Airborne 01.19.15

Tuesday

Airborne 01.20.15

Airborne 01.20.15

Wednesday

Airborne 01.21.15

Airborne 01.21.15

Thursday

Airborne 01.22.15

Airborne 01.22.15

Friday

Airborne 01.23.15

Airborne 01.23.15

Thu, May 31, 2007

Metal Fatigue Ruled Probable Cause Of 2005 Bell 206B Accident

Witness Tells Investigators Main Rotor Severed Cabin

A helicopter involved in a 2005 fatal accident in Perth, Scotland was cut in two by its own rotor blades, investigators informed a fatal accident inquiry board at the Perth Sheriff Court Tuesday.

The Bell 206B Jet Ranger II (type shown above) was flying from Cumbernauld to Aberdeen on December 21, 2005 on a gas pipeline inspection run for the National Grid when it crashed near Coupar Angus, killing the pilot and observer.

A catastrophic failure in the rear of the aircraft that tore the stabilizer fin, rear rotor blade and gear box from their mountings is said to be at fault, according to the Dundee Courier.

Witnesses reported seeing the helicopter "fall apart" in mid-air before nose-diving to the ground, killing pilot Robert Philip Ward, 48, of Glasgow, and observer Edward Lapsley, 56, of Tyne and Wear.

The helo was scheduled for a routine maintenance inspection when they were through with the job.

According to the BBC, witness Andrew Brown told the inquiry, "Suddenly bits started flying off it. The tail broke up first. The rotor from the tail was breaking and the whole tail came off. That seemed to break first and get entangled with the main rotor. It started dropping straight away. It just went straight down."

The Air Accidents Investigations Branch, which is responsible for the investigation of civil aircraft accidents in the UK, concluded the crash had ultimately been caused by metal fatigue.

AAIB inspector Keith Conradie said the investigation quickly focused on the helicopter's tail.

"The first items in the wreckage trail were items associated with the rear part of the helicopter. Found first in the accident location were the vertical fin and the stinger, which hangs underneath the vertical fin," he said.

"The vertical fin came away, swinging underneath and into the area of the tail rotor," he continued. "This caused the tail rotor and gear box to depart from the helicopter."

He said the loss of the tail rotor and the loss of mass would have made the aircraft "impossible to control, as it would have become "nose heavy" and would have quickly started to dive.

"It appears that the main rotor-blades flexed and struck the tail boom as the pilot attempted to lift the helicopter out of the nose dive," Conradie said. "They then flexed again, striking the cabin. The front of the cabin was cut off."

FMI: www.aaib.dft.gov.uk/home/index.cfm

Advertisement

More News

Airborne 01.23.15: Google/SpaceX Bucks, Pet Aero-Rescue, Return of the P-3?

Also: Disruptive Innovation, V22 Ospreys, USAF Lets Bluebook Loose, Dawn and Ceres, FAASTeam Virtual Safety Stand Down As SpaceX’s Elon Musk pushes ahead on his development o>[...]

ANN FAQ: Getting The Word Out

Things To Know When You Send A News Release Aero-News gets hundreds of releases every week, ranging from industry giants like Boeing and Cessna to the smallest of flying clubs and >[...]

USAF Releases UFO Project Blueboook

Nearly 130,000 Pages Of Documents Posted On The Internet The storied USAF Project Blue Book has been published online ... including nearly 130,000 pages of declassified UFO records>[...]

Aero-News: Quote Of The Day (01.25.15)

"That's going to be the initial focus over the next year. Certainly in the next year-and-a-half or so, we will be far enough along in continuing (tactics development) to develop a >[...]

ANN's Daily Aero-Linx (01.25.15)

Aero Linx: A-4 Skyhawk Association An affiliation of individuals who have flown, maintained, (or who simply love) the "A-4 Skyhawk"; and who are dedicated to the perpetuation of th>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2015 Web Development & Design by Pauli Systems, LC