Can anyone explain to a engineering novice what needs to be done to repair this structural damage? I guess it's not done with a bit of using a hammer and some paint.
Would be really interesting to understand what work needs to be performed to ensure a safe operation for years to come. Thanks in advance.
1. strip out all the interiors and systems from the damaged area both above and below the waterline
2. stabilize the a/c with body and wing jacks
3 place cradles under the damaged section
4. remove the skins and damaged stringers They will probably leave the stringers attached to the skins for removal and cut them off leaving about 8 inches sticking out for splicing the new stringer sections.
5 check for damaged ribs and remove and that are damaged (they may choose to remove all anyway so standard sized fasteners can be used)
6. straighten the fuselage by jacking up the bent section until the waterline is level
7. check for lateral distortion and and correct by moving the cradles
8 when all is square
9 install new ribs
10 install new stringers
11 install new skins
12 if the window band was damaged, they will have some concerns and the window band is probably no longer available new..and cannibalizing one would require testing. With out windows, the plane will probably become a freighter.
13 install all the interior clips, spray with Dinol, electrical harnesses, cabin fittings and interiors.. becoming a freighter will simplify that.
14 pass company, FAA and customer inspection.