Originally Posted by Buster Hyman
... I'm wondering whether the airframe is built to support such work, or is there other fittings internally that take the load?
Prolly the latter. They need to distribute the support stresses over a good-size area of the skin, so I'd wager there's a form-fitting bulkhead segment atop each I-beam inside the fuselage. Clever approach to the support problem!
