Originally Posted by
kettle1
...and why did it take so long to fix? Photos?
An airframe structural repair is not a quick project depending on the extent and location of the damage.
Gain access to the damaged area to map and remove the damaged structures (skin, ribs, stringers, etc.)
Inspect further for possible hidden additional damage
Get/generate engineering documents specifying repair requirements from either Boeing or in-house engineering
Order or manufacture required parts, and wait for any parts that may have required repair by an outside vendor
Perform repair and re-install any components or systems that required removal for access
Perform any required checks and all documentation to return aircraft to service.