A piece of metal (albeit reportedly one that should not have been attached to the airframe) falls from an aircraft and damages another with fatal consequences.
The tragedy that ensued would not have happened if.....if.....if. As the old saying goes, "If ifs and ands were pots and pans....."
The lessons were learned years ago, what is the need to pillory individuals?
If an action is "involuntary" (dictionary definition "done without exercise of the will") how can someone be found guilty of manslaughter?
Guilty of gross stupidity maybe for fitting an unauthorised part; guilty of slack checking procedures certainly.
One party will be missing in court - ADP which did not ensure the runway was swept, as required, prior to the departure of the Concorde flight.
Presumably in the legal and bureaucratic minds acts of omission cannot be classed as contributing to manslaughter.