Originally Posted by
LKB111

Tin foil hat time again, but.... I wonder if this could be done remotely. Not saying it happened on this flight, but what if someone could install chip in a FMS and override it from their computer on the ground...
OK, back to your originally scheduled program.
In theory, yes. But a pilot could simply over-ride any bad FMS programming. Worst case, he could turn the AP off and hand fly it if the FMS won't do what he wants. Or let the AP fly it with manual HDG inputs.
You can't take control of an airliner from the ground (until they build drone airliners).