NSEA - apples and grapefruit...
TAC (Thrust Asymmetry Compensation) and TCMA (Thrust Control Malfunction Accommodation) are completely different systems.
TAC is a flight control based system that moves the rudder to compensate for an uncommanded thrust asymmetry - such as an engine failure.
TCMA is resident in the FADEC and shuts down an engine that is at uncommanded high thrust and is not reacting to throttle movement.
Last edited by tdracer; 15th Sep 2016 at 20:04.
Reason: Fix typo