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Gulfstream G650 Crash - Roswell - 4 Dead

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Gulfstream G650 Crash - Roswell - 4 Dead

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Old 3rd Apr 2011, 13:55
  #41 (permalink)  
 
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Did you consider that Gulfstreamaviator is actually a Gulfstream pilot, who understands "crosswinds" and flying Gulfstreams.......
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Old 3rd Apr 2011, 14:00
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Briefly, but I also did wonder why anyone would think a less than 10 kts crosswind a challenge.
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Old 3rd Apr 2011, 14:16
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I am no guru, but I strongly doubt that 10kts X-wind is enough reason to scribble a whole airframe.

Horses for courses though, but there is nothing wrong with G4/G5/G450/G550 ability to handle crosswinds - technique is fairly simple. Recently had 27 kts at 90 degrees, no problems.

Even less problem for test pilots - lets face the facts. I dont think this accident had much to do with the prevailing met - - or else this program is doomed from the get-go.
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Old 3rd Apr 2011, 14:18
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I.R.PIRATE

I totally agree an unrelated red-herring!
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Old 3rd Apr 2011, 14:56
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Perspective

We all know that despite best efforts, skill, training this industry can be fraught with risk.

Despite all the conjecture and comment everyone spares a thought for all those and their families throughout this period.

I hope a great deal can be learnt from this be it conditions or engineering to make this industry asnsafe as the standards we all strive to achieve.

My condolences to all involved on this sad day and the loss of I am positive some great peers and colleagues in the industry.
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Old 3rd Apr 2011, 15:06
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Would there be additional Flight Data Recording going on during this phase of testing?
Just might give a clue as to what in the world happened.

VFD
All Gulfstream developmental test articles have real time telemetry streaming to the test trailer which monitors all systems. This includes transmissions from a constant Hot Mic among the pilots and flight test engineers.
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Old 3rd Apr 2011, 16:05
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Too true Nordstrom. This may have been a sad first for Gulfstream but the Challenger 604 certification program suffered a fatal crash back in 2000 when
2 pilots perished at Wichita.

ASN Aircraft accident Canadair CL-600-2B16 Challenger 604 C-FTBZ Wichita-Mid-Continent Airport, KS (ICT)
While the two mishaps appear similar, it is too early to speculate about causation. It could be many things - the test card called for the circuit breakers failing the left hydraulic system to be pulled, then at rotation the right system fails; anomaly during brake testing, the card calls for rotation at 107 knots and rotation occurs at 101 knots, an engine could have failed at a critical time in an airplane compromised for another kind of test, there could have been a glitch in the developmental fly-by-wire FCS occurring at the worst time in a flight - the cause will ultimately be known, but right now we should be thinking about the fine flight crew that was lost in this tragic mishap.

In the CL-604 JAR-OPS testing mishap at ICT, three people actually perished - the co-pilot, who was on an orientation flight, died from massive burns 36 days later. It's the nature of burns that you generally succumb to them, normally from a secondary infection. His family put up a website for him while he was alive - I visited it daily. While the mishap occurred because of aftward fuel migration in a test article already ballasted to its rear C.G. limit (the test was to begin at 41,000 feet, the Brits had questioned the CL-604's high altitude longitudinal stability), the real culprit was Bombardier's deficient test program. Neither pilot was a graduate of a recognized test pilot school, adequate risk assessments were not being accomplished, there was no "build-up" to the test being performed and the test had a higher level of complexity than the pilot flying had ever attempted.

Last edited by GVFlyer; 3rd Apr 2011 at 20:32.
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Old 3rd Apr 2011, 17:07
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Starting to sound like high speed abort that went really bad.

Shouldn't be too hard to figure out, all the wreckage is on the field. Any pics?
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Old 3rd Apr 2011, 17:30
  #49 (permalink)  
 
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Then the clients are deluded, as this tragedy has illustrated.
Yes, the super-rich tend to be deluded concerning such matters as mortality; it's a sad fact that Gulfstream surely understands...I hope the program is not catastrophically jeopardized...nevertheless it's a shocking accident...on what was a well performing test article

I have a few guesses and speculations in my head but I'll keep them to myself; other than to say that the goals for high speed flight and TO and landing at low speed tend to be diametrically opposed-aerodynamically and that certain aspects of that program seemed very optimistic---no LE devices etc...I know


I totally agree an unrelated red-herring!
are you always talking about things you can't understand?---be an ass somewhere else SM
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Old 3rd Apr 2011, 18:12
  #50 (permalink)  
 
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I wonder what the risk assesment for this testing concluded.
NTSB recommended risk assesments for flight testing after that Canadair accident a few years back.
You´re obsessed with that ****e aren´t you?

IF a testpilot needs a risk assessment to know a test flight is risky, then....

Lets assume the risk assessment said: very risky, so what then, should the testpilots stop testing airplanes or at least high risk tests, even though they are most likely prescribed by FAA/EASA ?
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Old 3rd Apr 2011, 18:24
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Sadly, I didn't attend any course/training at the National Test Pilot School, however I believe they do a risk assessment before every flight. Everything's even online: NTPS Test Hazard Analyses.

Enough said, I guess...
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Old 3rd Apr 2011, 18:37
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I wonder what the risk assesment for this testing concluded.
All Gulfstream test plans go through a safety review board where risk level is determined prior to their approval. Area's of higher risk are noted on the test card. Each flight is thoroughly briefed to the flight crew by the originating flight test engineer prior to the flight on which the test card is flown.
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Old 3rd Apr 2011, 19:06
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Video from the accident site;

The Kathryn Aviation Report: Gulfstream G650, Gulfstream Aerospace Corp., N652GD; Roswell International Air Center - KROW, New Mexico
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Old 3rd Apr 2011, 19:47
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had to refresh the page when i saw this thread title, didn't believe it upon seeing it and didn't want to either. Very tragic indeed and not looking forward to seeing the names on manifest when released.
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Old 3rd Apr 2011, 21:19
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Originally Posted by His dudeness
You´re obsessed with that ****e aren´t you?

IF a testpilot needs a risk assessment to know a test flight is risky, then....

Lets assume the risk assessment said: very risky, so what then, should the testpilots stop testing airplanes or at least high risk tests, even though they are most likely prescribed by FAA/EASA ?
"That ****e", as you so elegantly phrase it, just happens to be very important indeed.

Neither a pilot, nor an engineer, needs to do a risk assessment to understand that test flying is inherently risky. That is not the point of a risk assessment process. The point is to understand what the risks are, specifically, and to identify what actions you are going to take to mitigate the risk or address the consequences.

Concluding that a test is "high risk" doesn't lead to the conclusion "scrub the test" - it leads to the question, "what can we do to reduce this high risk to an acceptable level?" The risk assessment is the first step in achieving the goal of exposing the test crew, and test vehicle, to no unnecessary risks and to no unidentified risks. Thus making the testing process, while inherently risky, as low risk as can be reasonably achieved.
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Old 3rd Apr 2011, 21:23
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Originally Posted by Shell Management
What is the 'red window' in the photo above?
Red usually means an experimental part.

I'd guess it's either;

1. A replacement installation for a window that incorproated a controllable port the simulated a hole in the fuselage of a defined size, so that you can do cabin depressurizzation assessments by opening the hole, retaining the ability to close it again to continue flying or in the event the test goes badly; or

2. A window replacement being used to mount something in that location - perhaps a camera installation to observe the wing LE.

If I had to pick one, I'd say #1. Usually you wouldn't need to go to that extent to mount a camera.
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Old 3rd Apr 2011, 21:39
  #57 (permalink)  
 
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Thanks, Mad (Flt) Scientist. Excellent summary of appropriate and necessary risk management in flight testing (amongst other aviation activities).
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Old 3rd Apr 2011, 22:07
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Red usually means an experimental part

here is an example

Photos: Learjet 45 Aircraft Pictures | Airliners.net
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Old 3rd Apr 2011, 22:28
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The Learjet has COVERS not experimental parts. Covers are RED for visibility to ensure they are seen when installed.

The Gulfstream window is actually "Flight Test Orange" not RED and is used for external probes to my recollection.

Unairworthy parts are marked RED such as when unairworthy but on-ground useable landing gear or wheels are used for moving aircraft
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Old 3rd Apr 2011, 22:42
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Gulfstream Identifies Employees Killed in G650 Crash -- SAVANNAH, Ga., April 3, 2011 /PRNewswire/ --

"We mourn the loss of our colleagues and friends and extend our deepest sympathies to their families," said Joe Lombardo, president, Gulfstream. "The Gulfstream team has already rallied to support the people these men left behind, and we know that the local and aviation communities will do the same. On their behalf, we ask for your kindness, support and understanding as they, and the rest of the Gulfstream family, grieve the passing of these fine professionals."
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