New rules are required
Smoke and/or fire have led to QRH procedures that have changed many times over.
In stead of trying to isolate and/or evacuate the smoke from the flight deck using various system configurations.
It is time to have a closer look to design.
Design should incorporate a system whereby the crew can shut off ALL air supply to the flight deck, reverse the equipment cooling flow and flight deck air (dump it overboard) by use of a SINGLE Switch.
Hereby must (if a choice needs to be made) protection of the flight deck crew have priority over the cabin.
This includes having a look at the possibility to volunarily depressurise to extinguish the fire and reduce the use of electrical busses to a minimum. All with a single switch. Procedure should be reversable.
I's back to the drawing board.
Last edited by Pitch Up Authority; 5th Sep 2010 at 15:31.