Does transport-type certification account for engine separation and its possible effect on hydraulic lines?
Unsure whether it is designed to withstand an engine separation, but Boeing 737 seems to have an engine separation memory items:
https://www.johanpercherin.info/airline-pilot-training/boeing-737-memory-items-engine-fire-severe-damage-or-separation/
And 777 has one as well:
https://www.theairlinepilots.com/forumarchive/b777/b777memoryitemsandlimitations.php