This the non-normal procedures training philosophy at Sabena:
Critical phase of flight: no change of controls (PF remains PF, unless
dictated -for safety- by the captain).
Other phases: F/O pilot flying, Captain monitoring pilot and executes the
non normal checklists.
Kind regards.
Andre Berger
E-mail: aberger_at_innet.be
Website: http://www.linepilot.org