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On Sep 21, 11:52*pm, Ron Wanttaja wrote:
cavelamb wrote: Ron Wanttaja wrote: The NTSB has released the factual report: http://www.ntsb.gov/ntsb/brief2.asp?...5&ntsbno=WPR09... Well, kids, there you have it. Well... not COMPLETELY cut and dried. We've still got the issue about the main driver of the accident sequence...whether the canopy was open, and how difficult an open-canopy situation is to handle. A number of Lancair owners have encountered open canopies and reported that control was no big deal. *However, there have been three recent Lancair accidents that involved open canopies. *The pilot survived the most latest one, and gives a rather hair-raising report of what the plane was like to fly. http://www.ntsb.gov/ntsb/brief2.asp?...9&ntsbno=CEN09.... *From the above report, you can see that the open-canopy accidents are catching the NTSB's notice. When the NTSB comes up with a "Probable Cause," they seem to factor in what a competent pilot should have been able to accomplish, in those circumstances. *You'll see a lot of accident reports which list Pilot Error as the cause, even though the accident began with a mechanical failure, because the investigator thought the pilot should have been able to force-land safely. Works the other way, too. *If the NTSB concludes that the aircraft was uncontrollable with the canopy open, that'll be listed as the primary cause. *From what I can tell reading the report, it appears that the canopy *was* open. *The latches were undamaged; the ground impact twisted the hinges forward and to the left, which probably wouldn't have happened if the canopy was properly latched. It all boils down to whether the NTSB concludes that the flight could have been safely completed had Phillips not been impaired. *My guess is that the impairment won't be listed as the Primary Cause, but as a contributor. One thing interesting, though, is that Phillips' accident differs from the other two canopy-open cases. *In those instances, pitch control became difficult, but neither pilot had trouble with roll. *The SnF plane continued to fly straight out, the pilot in Colorado actually brought the plane back around the pattern and crashed on short final. In contrast, once the canopy opened, Phillips' Lancair started turning left and descended into the group. Do you know what this reminds me of? *John Denver's accident. *The main theory there was that Denver trying to turn a stiff fuel valve to switch tanks after the engine quit on takeoff. *He turned to the left to try twist the valve...and his right foot applied pressure to the rudder, turning the plane in the opposite direction from where he was looking. Imagine Phillips' canopy coming open soon after takeoff. *He turns towards the handle on the canopy to try pull the canopy down...which is probably mounted on the center section, above and to his right. *This naturally extends his left leg, which pushes the rudder pedal and starts a turn to the left. *The plane begins to descend, and goes into the ground while the pilot is fiddling with the canopy. *The passenger, too, is looking up and behind at the canopy bow and doesn't notice the change in attitude. One of the things I've heard about the impact of drugs and alcohol is that the first thing to go is the ability to multitask. *I wonder if that's what we're looking at, here....an unimpaired pilot would have detected the roll, while Phillips became too focused on closing the canopy. Ron Wanttaja The problem with trying to diagnose what ultimately caused an accident where something unusual occured with the aircraft is determining the subsequent events which might have contributed. Many of the major aircraft accidents over the years have all been traced to a series of events that combined to cause the accident. One of the first KIS Cruisers to be finished by a homebuilder was destroyed when the pilot side door opened during climbout following takeoff. The pilot reacted by trying to reach up, grab the door and either close or hold on to it. That action caused the pilots seat cushion to shift and jam against the stick pushing it forward and to the right. The plane took a nose dive and hit the ground before the pilot could recover. In that case, the pilot was very lucky and survived with major but recoverable injuries. Something of that very nature could have occured in this instance. Bill was a good pilot but a distraction of trying to get the canopy closed may have led to some other problem that he was unable to recover from in time. |
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