I was told...The 757/767 cockpit DV windows can be cranked opened and closed below 210 kts if the pilot requires it in a non normal situation.
After the smoke drill has been completed,opening the DV window on final approach will remove any persistent smoke in the cockpit (plus your lose maps and paperwork!) that is causing outside visibility problems and the design leaves an area of still air just outside of the forward frame to enable the pilot to see the runway through this area of still air, if doing a manual landing.
Also if a DV window is not locked on the takeoff run it will slowly roll back open as the speed increases.
This once caused a high speed abort, due the increasing noise and lack of other warnings confusing the pilot.
Aborting for this was thought incorrect as it should have been cranked and locked close below 210 kts airborne.
However eight new main tyres,and a 24 hour delay was the result in this DV window case.
I wonder if anyone has also been told the above DV window operating limitations?
[ 02 January 2002: Message edited by: scanscanscan ]</p>