Genghis,
What kind of case are you trying to make ?
In my experience most FOD damage is because the rules are bent.
( yes after 20 hours when its hissing down with rain or -5 it is easy to bend rules
)
Many times a proper FOD inspection is not done.
All the manuals have danger areas at various power settings but how many people that run engines could either quote those figures or visualise where they are in relation to the intake.
Doing a static run should be relatively easy to police. Having to taxi to a run up area is more difficult.
Another problem is when you position on a run pad to do power assurance and then the wind changes so you have to move ( L1011 No 2 engine
)
I think that if you look at the number of engine runs carried out, the number of FODs is not that many. Of course the accountants will tell you one is too many - but hey **it happens
I am not sure what you can do to prevent it.
