All the available eventhandlers are listed in the Command Reference......these are:
"Killed" object : killer
"Hit" object : causedBy, scalar : howMuch
"Engine" bool : engineState
"GetIn" string : position (1), object : unit
"GetOut" string : position (1), object : unit
"Fired" string : weapon, string : muzzle, string mode, string : ammo
"IncomingMissile" string : ammo, object : whoFired
"Dammaged" string : selectionName, scalar : howMuch
"Gear" bool : gearState
"Fuel" bool : fuelState
"Init" No arguments.
Planck