@EugeneMcParland
Incredible, isn't it. Anton Geraschenko has reported extensively on this (forgive the Xwitter link). The word that really jumped out at me is "artisanal" -- which in this case appears to mean unqualified mechanical service using parts that are uncertified, worn, and/or maybe even adapted from incorrect.
https://twitter.com/Gerashchenko_en/status/1727698972767089109