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NTSB Releases Cockpit Recording of fatal Hanscom G-IV crash
"Lock is on," the pilot says seven times as the plane accelerated down the runway at Hanscom Field, outside Boston. His next words were "I can't stop it," then "oh no no." The Boston Globe further reports that "a review of the plane’s data recorder revealed that such checks had been performed in full prior to take off only twice in the previous 175 flights, and were not completed prior to the crash."… (www.philly.com) Más...
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There are many pilots that fly the same plane all the time , 135/91's, that after a while, don't run a complete checklist if they run one at all. I am speaking from personal experience. This is what it can lead to. This partial report, while pretty well nailing the crew, leaves many questions unanswered, particularly in regards to the locks.
Agreed 100%, but I still feel there was some sort of anomoly as these guys were too well versed to attempt the takeoff with the gustlock on and not release it or abort!
Well, I think the report says the gustlock was off. As far as the abort, he did try, just ran out of room.
Well, I just reread it and you are correct. Never flown a Gulfstream but if lock was on, I can't see how they could get to takeoff speed and I think that is what's puzzling the board and the rest of the flying world.
Preach...I have had several opportunities to be in the pointy end of the Gulfstream. If I remember correctly the gust lock can only be set when hydraulics are powered down and unlocked before hydraulics powered up. If gust lock is set, throttles are not suppose to advance pass idle. Maybe there was a throttle lock failure?
Well, that seems to be the consensus but while it may be pilot error for not doing the list, it looks to me like the lock allowed to happen exactly what it was designed to prevent, speed.
Like I said earlier, if the engines are started with the gust lock engaged, you can release the lock which would allow the throttles to move freely but you could still have a hydraulic system lock up that prevents the control pins from disengaging. If you further exasperate the issue by not doing a control check you have now set up the accident scenario. Only recommended option is to power down the aircraft engines, bleed off system pressure to zero and start over. Very tragic.
