http://http://www.breakingnews.ie/ireland/eyaugbidgbey/
In a case like this would one of the cabin crew step in and help the other pilot?
This flight had a relief pilot, it was going international. Whenever a flight goes over a certain length of time, or international, they need a third pilot to allow the other pilots to get some rest. But on short, domestic flights, it is very doubtful that a member of the cabin staff would enter the cockpit. They have a job to preform as well. Airline crews are trained to operate the aircraft solo in the event of crew member incapacitation. If there happened to be a deadheading crew member onboard, they might step up and help.