NB: Aloha 243 was what I'd had in mind as well, and was when I'd learnt of the distinction between hours and cycles. For those unfamiliar, a 1988 airline inci

NB: Aloha 243 was what I'd had in mind as well, and was when I'd learnt of the distinction between hours and cycles. For those unfamiliar, a 1988 airline incident in which a Hawaiian airliner experience explosive decompression, though 94 of 95 occupants survived. The lone fatality was a flight attendant who was sucked out through the hole, and if my memory of the post-incident report stands, actually contributed to much of the fuselage damage by enlarging the initial failure region. <https://en.wikipedia.org/wiki/Aloha_Airlines_Flight_243 https://en.wikipedia.org/wiki/Aloha_Airlines_Flight_243> Another of my references are the US B-52 Stratofortress fleet, the youngest of which were built 61 years ago in 1963, for which active status is anticipated to extend into the 2050s. My understanding is that wing loadings/unloadings are the limiting factor, with virtually all other parts of the plane being capable of replacement. <https://en.wikipedia.org/wiki/Boeing_B-52_Stratofortress https://en.wikipedia.org/wiki/Boeing_B-52_Stratofortress> The overall airframe is rated for 32,500 to 37,500 hours, with aircraft experiencing about 380 flight hours/year. The wing upper service being the lowest limit of body parts indicated here: <https://www.globalsecurity.org/wmd/systems/b-52-life.htm https://www.globalsecurity.org/wmd/systems/b-52-life.htm>