I can hardly wait to see what you find out.

Anyhoo, I gave the AI my airline version of the plutocon (same plane, different flight dynamics), and it works better with the airline version.
The reason i have 2 versions of the plutocon is this: when i first created it, when i still only had fs98, i gave the plutocon airliner the flight dynamics of a dc-3 with jet engines. the very first plutocon was much smaller than I intended, and was the airliner version. A few years later, i redid the plutocon and got the size it has now, and copied it to make the presidential version of the plutocon (the one you see in my sig). I the presidential plutocon kept the original flight dynamics, while i gave the airliner version the flight dynamics of a supersonic 747, and this time, i modified the flight dynamics so the flight dynamics would fit the larger size.
I got 2 results, the presidential plutocon could reach flight level 1000 in fs98, but only if the air temps at sea level were over 140 degrees Fahrenheit. the airliner was much heavier and couldn't reach the height and speeds of the presidential version.
Now, in fs2000 and fs2004, both aircraft are extremely unstable at any altitude above 35000, and oscillate from left to right and up & down wildly especially when the autopilot is on.
Also, i decided to follow one of the AI airliner plutocons via slew mode, and noticed that it far overshot the altitude ATC temporarily assigned it to immedieatly after takeoff (7,000) and couldn't get back down to it, so i got bored watching the AI being stupid so I went back to PLTO.
System Specs: HP 2000 Notebook PC; Windows 8.1 64-Bit; 4GB RAM; AMD E-300 APU w/ Radeon HD Graphics (2 CPUs), ~1.3 GHz; AMD Radeon HD 6310.