[zencat]

"You are probably thinking of the problems with the passenger windows in the DeHavilland Comet of the 1950's."

Eyup. Isn't there a structural issue with sharp corners when they are continually pressurized and depressurized?

[Blood of Tyrants]

Yes. Sharp inside corners are a naturally high stress area and aluminum is much more susceptable to stress fractures than steel. The plane in the test fixture they rigged up to test the airframe failed after only a day or so of testing. The engineers were expecting the airframe to last at least a week and were called up in the first night with the news.

The fix was easy. Remove all those big beautiful, rectangular windows and replace them with aluminum plates with little oblong windows in the middle.