1.3 nm
After looking at MM43's chart and the graphs and earthviews, etc. it appears that they made contact with trees almost exactly 1.3 nm before the TH.
This seems a strange coincidence with the 1.3 nm distance from the TH to the I-BXO LOC.
Would the approach database have this entry as a + or - value to reaching TH from the FAF that the AP or AT would use as a command input for flight path? Who programs the database?
What are the functions of the AP and AT when operating separately and when operating at the same time? During simultaneous operation which of these controllers is the dominant? Is it a master-slave with only one issuing commands, or might they both be trying to close the loop for their respective objectives.
My view is from a premise that the pilots did not fly this plane down into the ground, but that the computer did. There is the human interface and command data input, the software and controllers, and the hardware actuators to be considered. Maybe it is an unreasonable assumption?
Last edited by kenneth house; 1st Sep 2013 at 11:41.