NigelOnDraft
That argument really doesn't stand up I'm afraid and is no justification for not having a simple and effect procedure in place that may be a possible preventable solution to recent tragedies. I think you'll find it becomes an absolute requirement for all operators very soon. It's a multi crew team orientated environment. We all oversee one another throughout the whole operation. This is no different. A simple protection against any form of incapacitation.
TWO PEOPLE ON THE FLIGHT DECK AT ALL TIMES DURING FLIGHT. Facilitated by a member of cabin crew remaining momentarily on the flight deck (as they would during single pilots ops in the event of a pilot incapacitation) during toilet breaks etc. It's not new. It's already applied. It should be mandatory. Nuff said!