Global Warrior
16th Feb 2010, 22:40
Hi Lads and Lasses
this post is about me learning and not wanting to hijack the other threads about this issue. There's enough momentum on the NZ and AF aborts, i believe, for me to start a new thread, so for those of you that think i should have posted in the aformentioned threads........ sorry.
Im interested to know and learn about how an inadvertant auto pilot engagement on the ground can happen on a 777. Ive just had dinner with one of my other captains and assumed that it could happen to us and if it did would we know?
The reason im going down this road is because we are all trained for an engine failure at V1 but statistically we are more likely to encounter a tyre burst or (fill in your emergency) .......... (....)
With regards to the threads about the high speed aborts and possible inadvertant auto pilot engagement, i really want to hear from the chaps that fly the plane.... not "experts" that dont.
Can you please talk me through a possible inadvertant auto pilot engagement scenario.........
i'm assuming the following might happen but i know nothing about the 777 systems, ergonomics or sop's.
Please allow me some licence here......... In our aircraft, a Global Express, our conrorl movement check would surely annunciate a control issue if the auto pilot was enageged at the time. So for us, an inadvertant auto pilot engagement issue would happen because of
a Flight Control Panel button selection which inadvertantly selected the autopilot to engage.........when the intended button/knob selection may have been a heading..... altitude........ or a radial as part of a clearance for example........ after the control check.
Is the auto pilot engage knob/button/lever on a 777 on the flight guidnce panel or somewhere else such as the center pedestal? There seems to be severall (10 maybe) instances of this happening on a 777. I would like to hear from the guys that fly the plane.... is this an sop, ergonomic or training issue? Subjectively, could it happen on any aircraft?
Would a full control check on line up, for example, reveal the problem or is there a software issue that allows the AP to engage without a positive button selection?
Also i believe the 777 is equipped with Boeing's version of fly by wire. At rotate on this aircraft........if the autopilot was engaged....... does the control column move but without any corresponding flight control movement, or does it feel "jammed" ?
Thanks for the education.
Regards
GW
this post is about me learning and not wanting to hijack the other threads about this issue. There's enough momentum on the NZ and AF aborts, i believe, for me to start a new thread, so for those of you that think i should have posted in the aformentioned threads........ sorry.
Im interested to know and learn about how an inadvertant auto pilot engagement on the ground can happen on a 777. Ive just had dinner with one of my other captains and assumed that it could happen to us and if it did would we know?
The reason im going down this road is because we are all trained for an engine failure at V1 but statistically we are more likely to encounter a tyre burst or (fill in your emergency) .......... (....)
With regards to the threads about the high speed aborts and possible inadvertant auto pilot engagement, i really want to hear from the chaps that fly the plane.... not "experts" that dont.
Can you please talk me through a possible inadvertant auto pilot engagement scenario.........
i'm assuming the following might happen but i know nothing about the 777 systems, ergonomics or sop's.
Please allow me some licence here......... In our aircraft, a Global Express, our conrorl movement check would surely annunciate a control issue if the auto pilot was enageged at the time. So for us, an inadvertant auto pilot engagement issue would happen because of
a Flight Control Panel button selection which inadvertantly selected the autopilot to engage.........when the intended button/knob selection may have been a heading..... altitude........ or a radial as part of a clearance for example........ after the control check.
Is the auto pilot engage knob/button/lever on a 777 on the flight guidnce panel or somewhere else such as the center pedestal? There seems to be severall (10 maybe) instances of this happening on a 777. I would like to hear from the guys that fly the plane.... is this an sop, ergonomic or training issue? Subjectively, could it happen on any aircraft?
Would a full control check on line up, for example, reveal the problem or is there a software issue that allows the AP to engage without a positive button selection?
Also i believe the 777 is equipped with Boeing's version of fly by wire. At rotate on this aircraft........if the autopilot was engaged....... does the control column move but without any corresponding flight control movement, or does it feel "jammed" ?
Thanks for the education.
Regards
GW