I've done a quick search to see if anyone has asked this before...I'm baffled

(as are others)
Does it count as shooting a weapon, is it fired/released in the shooting phase or before, does it matter?
I have 5 deffcoptas (I have 9

but only doing 5 for now) about to be modelled (I’ll spru build crates marked TNT (in an ACME way) for those who get bigbomms.)
Using deffcoptas is it possible that the following situations can arise legally?;
A) A unit of 5 with 4 bigbomms flies over a squad in movement phase, and drops all 4 of its big bomms on that unit.
B) A unit of 5 with 4 flies over 2 units in its movement phase and drops 2 on the first thing it flew over and 2 on the second thing it flew over.
C) (progression of B) a unit with 4 big bomms flies over unit (1) drops bomms, then in shooting phase shoots unit (2) and assaults unit (2) Does it make any difference if the scenario changes to only 3 drop bombs and the remainder shoots (2)?
D)A unit of 5 that has 4, turboboosts and drops its bombs
(2)A unit of 5 that has 4 turboboosts in a scout move and then says it dropped bombs
(p48 of ork codex)I'm up for both
RAW and how it "should be" answers.(for those who look outside
RAW for answers the cost of 5 deffcoptas with 2 buzzsaws and 4 bigbomms comes in at around 285pts or 8 and a bit Kanz

)
My answers as I see em (but I'm a relative noob with orksies)
A) yes,legal
B) yes
C) depends on what a "special attack" means ,it doesn't say it counts as shooting (doesn't say "in lieu of shooting" etc)and it implies (to me) it is released during the movement phase- it can be dropped even if you turbo boost (which stops the ability of shooting normally p76 Big (red?) book )) this is the most likely one to come up in game (as in my current list I'm only using 1 bomm for early on as they sweep in) Love to hear your views and comparisons to other things that may, or may not, happen outside the shooting phase,or just perform additonal attacks too shooting.
D) yes
RAW stipulated (2) No scout move isn't movement phase.
So how close did I get?
Thanks for any replies
KMB