WITWIW
As for your comment on FLT Deck windows
-Incidentally, why would the window be "possibly unstable"? Boeing windows don't do that without heat, you are just required to slow down at lower levels. I would have expected Airbus windows were the same. Maybe a 'Bus driver can clarify?
I do believe A330 cockpit windows are structurally sound without window heat " ON " but as for some BOEING aircraft, the heat feature enhances their impact strength................thats what I've ben told...FYI
TH
