re post 166 and autoclave
NO--- an autoclave NOT needed for most composite repair- vacuum bag techniques plus hot air heaters and different type of epoxy material will generally work. However, in this case, the combination of many stringers and possibly aft pressure bulkhead issues and smoke damage may well tip it to a hull loss.
for example ramp rash does not need autoclave for repair even if a few frames are bent.
My background- did work on composites many moons ago on and ALL composite with some Titanium parts aircraft called the B2- and repair issues were well developed then.