"Jim Macklin" wrote in message
news:%xQqf.30408$QW2.23629@dukeread08...

It was something I read many years ago, maybe during my A&P
course at Spartan, but I remember that the issues cited were
design of the windows and the quality of the joints and
rivets. The metal was an alloy that was prone to cracking,
but was strong. The extra pressure cause the metal to
expand and contract into the fatigue range of the alloy. It
all came together or should I have said apart on several
airplanes.


The metal was quite thin. The skin of the 707 was about four times as thick
and Boeing employed ripstops as well.