Question: Is there a historical reason why recall items are delayed to >400AGL? My company manuals suggest that 400' is not a minimum but a typical height at which to initiate. I dont see what possible reason there is to delay the fire fighting if the aircraft is under control and not in imminent danger of flying into the ground...The sooner it is dealt with the sooner (wx and terrain permitting of course) you can point the thing in the other direction and recover your ailing ship surely???