B737 Engine fire on ground
Can anyone shed light on the following:
All the Operators I have worked for require that Memory items are to be completed by the FO unmonitored AND both bottles should be fired WITHOUT waiting for 30secs between.
I have recently been informed that this is not the procedure adopted by some companies who require that the 30sec interval is taken on the ground as well as in the air. The rationale, I am told, is that firing both bottles one after the other is less effective in putting the fire out. I cannot find any definitive Boeing advice on the subject - can anyone help please?