SpaceShipTwo accident report released
The National Transportation Safety Board today released the results of its investigation into last year’s SpaceShipTwo crash, concluding that the accident was caused by pilot error combined with the failure of the ship’s designers to include systems that could have prevented that error.
The National Transportation Safety Board concluded Tuesday that the developer of a commercial spacecraft that broke apart over the Mojave Desert last year failed to protect against the possibility of human error, specifically the co-pilot’s premature unlocking of a braking system that triggered the in-flight breakup of the vehicle.
In its recommendation, the board took pains to make clear that Scaled Composites, an aerospace company that has partnered with Virgin Galactic to develop the spacecraft, should have had systems in place to overcome the co-pilot’s mistake. NTSB Chairman Christopher Hart said he didn’t believe the company took shortcuts that compromised the spacecraft’s safety. Rather, he said, it didn’t consider that the crew would make such a mistake. “The assumption was these highly trained test pilots would not make mistakes in those areas, but truth be told, humans are humans,” Hart said after the hearing’s conclusion. “And even the best-trained human on their best day can make mistakes.”
This really isn’t news. This was the conclusion reached only weeks after the accident. It also does little to ease the problems at Virgin Galactic.
On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.
The print edition can be purchased at Amazon or from any other book seller. If you want an autographed copy the price is $60 for the hardback and $45 for the paperback, plus $8 shipping for each. Go here for purchasing details. The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.
The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News
The National Transportation Safety Board today released the results of its investigation into last year’s SpaceShipTwo crash, concluding that the accident was caused by pilot error combined with the failure of the ship’s designers to include systems that could have prevented that error.
The National Transportation Safety Board concluded Tuesday that the developer of a commercial spacecraft that broke apart over the Mojave Desert last year failed to protect against the possibility of human error, specifically the co-pilot’s premature unlocking of a braking system that triggered the in-flight breakup of the vehicle.
In its recommendation, the board took pains to make clear that Scaled Composites, an aerospace company that has partnered with Virgin Galactic to develop the spacecraft, should have had systems in place to overcome the co-pilot’s mistake. NTSB Chairman Christopher Hart said he didn’t believe the company took shortcuts that compromised the spacecraft’s safety. Rather, he said, it didn’t consider that the crew would make such a mistake. “The assumption was these highly trained test pilots would not make mistakes in those areas, but truth be told, humans are humans,” Hart said after the hearing’s conclusion. “And even the best-trained human on their best day can make mistakes.”
This really isn’t news. This was the conclusion reached only weeks after the accident. It also does little to ease the problems at Virgin Galactic.
On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.
The print edition can be purchased at Amazon or from any other book seller. If you want an autographed copy the price is $60 for the hardback and $45 for the paperback, plus $8 shipping for each. Go here for purchasing details. The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.
The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News
It would seem there is a big difference between “unlocking” a system and “activating” it. Looks like the co-pilot made an assumption he shouldn’t have, and the designer(s) also made an assumption, which they should never have made.
It always takes a chain of mistakes to cause a disaster, not just one single item.
Supposedly the wings were not intended to be deployed while under thrust or in atmosphere.
You would think that instead of relying on a pilots perfection they would instead of rely on a safety system or two.
Such as a altitude activated lock to that if any atmospheric pressure is noticeable then the wings are locked. AS soon a vacuum is detected the wings get unlocked.
Plus they can add a mechanical thrust detection system so that if the rockets are on the wings are locked.
Or they could have slightly redesigned the wings so that if they did become unlocked in atmosphere they would naturally want to stay in a natural flight configuration instead of trying to swing up into the feather shape.(remove the lift on the back horizontal stabilizers.)
I would have thought that the development of this craft would have been further along that it was considering that Richard Branson wanted to put paying customers in it. I wonder if Scaled Composit signed off on this or if they abandoned the project, I do not see Burt Rutan making these kinds of mistakes, seems like things happened after his retirement. I do think that this is the nature of development in highly experimental aircraft, so many situations that cant be modeled.
Rutan got out of this a long long time ago.
Other reports have suggested no written checklist (find that hard to believe) and that the flight manual the pilots study had no mention of the implications of unlocking the brake (feathering) mechanism. Maybe some additional contributing factors beyond “humans are humans”.