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#11
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A Pilot Gives Thanks
On 2007-02-03, Matt Barrow wrote:
Here's a very similar case which was a runaway trim. http://www.ntsb.gov/ntsb/brief.asp?e...24X01192&key=1 What really stunned me about that report is that the probable cause chain does not end with the pilot. -- Ben Jackson AD7GD http://www.ben.com/ |
#12
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A Pilot Gives Thanks
Larry Dighera wrote:
Ummm... If I were Willard, I'd have pulled the autopilot circuit breaker. Strange no one thought of that. My autopilot has no fewer than four ways to disable it. All except the circuit breaker you're required to test during preflight. |
#13
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A Pilot Gives Thanks
"Ben Jackson" wrote in message ... On 2007-02-03, Matt Barrow wrote: Here's a very similar case which was a runaway trim. http://www.ntsb.gov/ntsb/brief.asp?e...24X01192&key=1 What really stunned me about that report is that the probable cause chain does not end with the pilot. Okay...I had a lot of "medicine" last night; could you elaborate on that? |
#14
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A Pilot Gives Thanks
On 2007-02-03, Matt Barrow wrote:
"Ben Jackson" wrote in message http://www.ntsb.gov/ntsb/brief.asp?e...24X01192&key=1 What really stunned me about that report is that the probable cause chain does not end with the pilot. Okay...I had a lot of "medicine" last night; could you elaborate on that? Almost every NTSB report that involves the failure of an airplane system that could have been mitigated by the pilot, no matter how terrible the user interface, is ultimately blamed on the pilot. In that particular report there's even a discussion of the steps the pilot could have taken to fix the runaway trim condition, so I didn't expect them to give the pilot any slack just because he was busy using both hands and all his strength to keep the nose up... -- Ben Jackson AD7GD http://www.ben.com/ |
#15
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A Pilot Gives Thanks
Ben Jackson writes:
Almost every NTSB report that involves the failure of an airplane system that could have been mitigated by the pilot, no matter how terrible the user interface, is ultimately blamed on the pilot. In that particular report there's even a discussion of the steps the pilot could have taken to fix the runaway trim condition, so I didn't expect them to give the pilot any slack just because he was busy using both hands and all his strength to keep the nose up... It's ultimately blamed on the pilot because if the pilot doesn't do everything possible, he'll probably be killed. Saying that it was really not the pilot's fault doesn't help much if he's dead. In other words, a pilot should do everything he can to save himself, whether the interface is good or not. -- Transpose mxsmanic and gmail to reach me by e-mail. |
#16
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A Pilot Gives Thanks
"Ben Jackson" wrote in message ... On 2007-02-03, Matt Barrow wrote: "Ben Jackson" wrote in message http://www.ntsb.gov/ntsb/brief.asp?e...24X01192&key=1 What really stunned me about that report is that the probable cause chain does not end with the pilot. Okay...I had a lot of "medicine" last night; could you elaborate on that? Almost every NTSB report that involves the failure of an airplane system that could have been mitigated by the pilot, no matter how terrible the user interface, is ultimately blamed on the pilot. In that particular report there's even a discussion of the steps the pilot could have taken to fix the runaway trim condition, so I didn't expect them to give the pilot any slack just because he was busy using both hands and all his strength to keep the nose up... /quote The investigation revealed that the K6 relay failure would constitute a single-point type failure in the electric pitch trim system. (Key) Pulling the circuit breaker, which is called for by the checklist in the event of a trim runaway, would have arrested the trim movement _provided_ (emphasis mine) the circuit breaker was opened prior to the trim reaching its stop. Further examination of the system revealed that the autopilot autopilot/trim disengage switch would not have disengaged the electric trim motor during the type of failure experienced in the accident airplane. /end Sounds like he had just a few seconds to react, and the first order of business was to disengage the AP, the he had to identify the problem as runaway trim. Not bad, for an 80 year old fart. |
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