[dz0ny]

On Dec 2nd 2016 the FAA had issued their airworthiness directive AD 2016–24–09 summarizing: "We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 787–8 and 787–9 airplanes. This AD requires repetitive cycling of either the airplane electrical power or the power to the three flight control modules (FCMs). This AD was prompted by a report indicating that all three FCMs might simultaneously reset if continuously powered on for 22 days. We are issuing this AD to address the unsafe condition on these products."

[fransje26]

For what it's worth, that AD got superseded in 2020, after a hardware and software update:

https://www.federalregister.gov/documents/2020/10/09/2020-22...

[nightowl_games]

Oh my god that is pathetic. 22 days is so short.