`Aloha Airlines Flight 243`

Parallel case to Seawolf. The early-1990s 737 fuselage roof failure attributed to Aloha being the fatigue-leader in the worldwide 737 fleet — 40,000 cycles in 30,000 hours due to 40-minute interisland flights. Boeing's fleet-average inspection schedule missed the outlier. One fatality (unbelted flight attendant). Used to teach: do more inspection on the fatigue leader, the same lesson as Seawolf.

To give you a similar example — anybody remember Aloha Airlines? Got to do something for Adrian, the aerospace industry, because other people during the school year could be watching this and they might be in the automotive business. Aloha Airlines, the one with the window —

Student: Crack?

What you're thinking of is the Comet, which was the 1950s. They had square windows on this British-designed aircraft, flying across the Atlantic, and they would just disappear in the Atlantic, because they were getting fatigue cracks from stress concentration in the corner. You will not see square windows in airplanes since then. But this — the top of the aircraft, more than 180 degrees, top half — section just blew off. The only person who died was one stewardess who wasn't belted. Everyone belted in survived. 40,000 feet, the top blows off. I was impressed the whole thing didn't break in two. If you Google Aloha Airlines, there'll be a picture of it sitting on the ground, and over half the top is gone.