"It TAKES place at 1500'"
So you're saying that the Boeing Maintenance Manual is wrong about the "arm" statement, Mr Spanners? Perhaps you can tell my old mate, John Karas at CX Maintenance Watch(Avionics) to look into it also ;-) (Tell him the "Riddler" sent you).
Cheers.
Q.
P.S. I'd also like to know when he's going to sign my 747-400 experience books!