Ace's suggestion looks
fancy, and I'm sure it'll work with resistance. Or not. I don't know. Haven't had the damned thing long enough to get to know all these new things...
Anyhow, in the old days we'd start by counting the ammo in the plane's launcher:
initAmmo= AeroPlane
ammo "laserGuidedBombLauncher"
and then we'd wait to see if he's dropped a bomb with a little:
? AeroPlane
ammo "laserGuidedBombLauncher" < InitAmmo
you can do this with triggers too, obviously, by counting the initial ammo in one trigger (or init.sqs, although I'm not too sure how well that works) and then having another trigger with the above mentioned condition...
"laserGuidedBombLauncher" is the name for the OFP LGB weapon, so if you've got some custom bomb in mind change the name. Also, if you already know how many bombs the plane has, you can just use a simple < (numberOfInitialBombs).
G'luck :toocool:
Wolfrug out.