That wasn't caused by a bomb, but metal fatigue due to corrosion. The only casualty, a flight attendant, was blown out of the plane. Extensive corrosion was also found from this B747 during a maintenance.
Wikipedia has an alternative theory to the big hole of the Aloha's 737:
Pressure vessel engineer Matt Austin has proposed an alternate theory to explain the disintegration of the fuselage of Flight 243.[4][5] This explanation postulates that initially the fuselage failed as intended and opened a 10" square vent. As the cabin air escaped at over 700mph, flight attendant C.B. Lansing became wedged in the vent instead of being immediately thrown clear of the aircraft. The blockage would have immediately created a pressure spike in the escaping air, a fluid hammer, which tore the jet apart. The NTSB recognizes this theory, but the board does not share the conclusion and maintain their original finding that the fuselage failed at multiple points at once. Former NTSB investigator Brian Richardson, who led the NTSB study of Flight 243, believes the fluid hammer explanation deserves further study.
Perhaps the 737 would've only suffered a hole similar to the 747 if the flight attentand wouldn't have plugged the hole during a rapid decompression.
