The 787 had three such bugs, in 2015 it was found out if the plane wasn't restarted once every 248 days (2^31 100ths of a second), the AC generation system woul

The 787 had three such bugs, in 2015 it was found out if the plane wasn't restarted once every 248 days (2^31 100ths of a second), the AC generation system would shut off, even mid-flight[0]. In 2016 it was found that if the plane wasn't restarted once every 22 days the 3 flight computers could reboot simultaneously, also in mid-flight[1]. In 2020 it was found that if it wasn't restarted at least every 51 days that the stale data monitoring system, and the stall and overspeed horns all stop operating[2]. Some A350s also had an uptime-dependent fault found in 2019[3]. 0: https://www.engadget.com/2015-05-01-boeing-787-dreamliner-software-bug.html https://www.engadget.com/2015-05-01-boeing-787-dreamliner-so... 1: https://www.pcmag.com/news/boeing-787-dreamliner-bug-fix-requires-turning-it-off-and-on-again https://www.pcmag.com/news/boeing-787-dreamliner-bug-fix-req... 2: https://www.theregister.com/2020/04/02/boeing_787_power_cycle_51_days_stale_data/ https://www.theregister.com/2020/04/02/boeing_787_power_cycl... 3: https://www.theregister.com/2019/07/25/a350_power_cycle_software_bug_149_hours/ https://www.theregister.com/2019/07/25/a350_power_cycle_soft...