: No. It's a deliberate act. The malfunction didn't "scramble his brain : impulses," it removed his restraints.
That's your interpetation. The text doesn't give us to believe that we're seeing the true Gan. I'd grudgingly allow that it leaves the possibility open, but on the other hand we have:
AVON: It's not my field, but if I am right, then the limiter is feeding scrambled impulses into his brain.
Which seems sensible given that: 1. If he is the cold blooded psychopath capable of planning the abandonment of friends to be killed while leaving himself looking merely the fool, and all the limiter did was remove his restraints, why the temper-tantrums in plain sight of everyone? Why not pick the others off one by one, first though asleep in their cabins, then whoever is on duty on the flight deck. Why attack without weapons and inefficiently? He's only going to, well, get himself drugged and bound going about things that way. 2. The limiter is right in whatever portion of his brain controls the urge to kill. It deteriorates, it isn't as if it's suddenly not there; there's a metal irritant among his dendrites at the very least.