SASless..I think you are right about the number of false fire warning to the actual fire warning incident in helicopters. Maybe based on this some one might have said "Lets get to 500 ft" before we react! I have personally know of two incidences where there was a Fire warning and they pulled the wrong engines. One was on a S 61 (military) many years ago and another was on a Bell 212(single pilot) at night. Both were fatal.