FCeng84,
With respect, but sorry, I can"t get my head around "cables modelled as springs" and "cables stretching" with the "ability to cope with the consequences of a column jam". I can't see too many pilots "stretching" 3/16th dia carbon steel cables via the control columns!!! So what does the elevator breakout mechanism under the cockpit floor for a left or right cable jam do, and, the pogo"s at the elevator pcu's do then???
What exactly are your qualifications? Are you a engineer/mechanic/LAE/LAME???
Rgds McHale.