Originally Posted by
safetypee
tdracer, re AT clutch / cable description #792.
Is it possible, depending on design, for both thrust levers to move together - AT clutch control in flight deck area, but with cable friction etc, for one engine to lag or freeze resulting in asymmetric thrust.
If I understand your question correctly, not really. There is some cable stretch and lost motion in the connections between the throttle and the fuel control, but we're talking the equivalent of maybe a half knob of throttle movement - so while one engine may lag a bit, it shouldn't be enough to cause a serious issue.
With cable engines, there is normally some throttle stagger between the engines - in addition to what I noted above, there are differences in the fuel controls and their 'trim' settings, and (IIRC) on the CFM56-3 engine, the fuel control controls to N2 - not N1 - so to align N1s might require slightly different throttle positions (there is also an analog electronic supervisory control that trims the fuel control to attempt to keep N1 constant as the conditions change). However even with all that, there should be less than a knob of throttle stagger with equal N1s (and maintenance action taken if it gets that large).