Many of us might remember the miraculous Aloha Airlines Flight 243, a 737 bought new by the airline in 1969, which in 1988 after 35,496 flight hours, but over 89,680 takeoff and landing cycles, lost 1&#x2F;3 of its top fuselage and one flight attendant (it did a lot of short flights between the islands see <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Aloha_Airlines_Flight_243" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Aloha_Airlines_Flight_243</a>).  Per the Conclusion of the Wikipedia article:<p><i>Under current FAA regulations for the Boeing 737 (line number 291 and prior) established in the 2010s, this airframe would have had to be permanently withdrawn from service after 34,000 flight cycles or 34,000 hours, whichever came first (for production number 292 and higher, it was increased to 75,000 flight cycles and 100,000 hours). The nearly 90,000 flight cycles exceeded the design limit of the 737-100&#x2F;200 under either construction model.</i>