The Aloha Airlines B-737 that blew it top had about 86,000 cycles, not hours, it had only about 35,000 hours on the airframe. Aloha averages about one third of an hour per cycle on their aircraft because of their short up and down flight segments. On the opposite end, the TWA 747, flight 800 that exploded had almost 100,000 flight hours, but only about 19,000 cycles because of their long over water segments that the 747’s usually fly.
One of the contributing circumstances about this Aloha 737 and its sister aircraft at AQ
was in the early days of the 737 production, Boeing used a cold glue method to reinforce the lap joints in the fuselage. This method trapped moisture in the glue and this moisture combined with the salt air environment these aircraft lived it caused the skin lap joints to corrode heavily. Boeing realized this problem before this incident and changed over to a hot glue method, which boiled out all the moisture from the glue before it was applied. If I remember correctly the cold glue method was used in about the first 175 Boeing 737’s, after that the hot glue method was used. This AQ
737 and 2 sisters were delivered new to AQ
from Boeing and spent their entire lives flying inter island. Before this incident, Boeing factory reps on an inspection stated that these 737’s were the most heavily corroded aircraft they had ever seen. After the cause of this accident was determined, AQ
removed the sister airplanes from service after an inspection reveled they to were severely corroded and were parted out.
FYI, the 737 that became a convertible was scrapped on Maui but did live on in a way after scrapping, the entire nose section was shipped to the mainland and was converted to a B-737 flight simulator.