Above is Boeing 747 forward cargo door (More Schematics)

Above was DC-10 cargo door.

forwardcargodoorpict.html
Boeing 747 UAL 811 aft midspan latch rupture
Press Kit
811doorhalvesphoto.html
Schematic1
Schematic2
Schematic3
Boeing 747 nose picts right side cargo door
811 picture
cargodoorfaraway.html
AD Airworthiness Directive 79-17-02
Airworthiness Directive Amendment to 89-05-54 amending 88-12-04
811doordraw
Airworthiness Directive 88-12-04 Boeing 747
More pictures of UAL 811 cargo door hole
Cargo door accidents

Comment: The culprit. Note hinges on top of door and not on forward side where they belong. Design error. OK design for stagecoaches, buses, cars, and trains, not OK for high speed aircraft. Note complexity of locking system; difficult to lock correctly and check locked on dark, cold, noisy, rushed night on the ramp. Top drawing is Boeing 747 door and bottom drawing is DC 10 door both before fatal crashes. 3 Nov 97