I have just seen an interesting video where this flap is open as the aircraft powers up for take off and it then, as the aircraft begins to accelerate, it closes. Is this automatic, was it forgotton or do you suggest it was closed manually by the crew at that time?
There isnt really a dark side to the moon, as a matter of fact its all dark!
Avioniker From United States of America, joined Dec 2001, 1109 posts, RR: 11 Reply 2, posted (6 years 4 months 2 weeks 6 days ago) and read 3640 times:
From the time the aircraft starts its takeoff run, until it passes through 5000 ft, the pressurization controller maintains the aircraft cabin at the field elevation.
That's in case they have to return to the runway.
Keeps ears from popping and limits undue stress on a number of components that are vented to the outside air.
That is, of course, if the engineer is using the automatic mode of the pressurization controller.
One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533