<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by LarryJ:
No. The airplane begins to pressurize either during taxi, or immediately after takeoff, depending on the aircraft.
The idea is to keep the rate of change and maximum cabin altitude both as low as possible to minimize discomfort.</font>
So during taxi, this would mean that they
depressurize the interior to equate to a higher altitude? This would minimize the change in pressure as the plane rises. But then shortly after takeoff, the pressure outside would be greater, thus making it very easy to open an inwards-opening door.