What happens if while in cruise the stabalizer gets jammed?
You lose trim.
The trick would be to maintain the IAS at which it jammed for as long as possible and ensure passengers and crew remain seated to minimise CG movement.
You may well be limited in the amount of flap which may be used because of the pitching moment caused.
the pilots could overcome the forces required to pitch the a/c by sticking
their feet on the dash and pulling hard!
But the elevators are still working.