whale2guppy
it’s purely that. Every second counts when you’re on fire. You descend down to the mid 20’s as a trade off for max TAS vs minimum oxygen to feed the fire. Then when you’re 75 miles away from your intended runway you descend at VMO and do an idle descent flinging out the services from 3000’ onwards at the placard speed and you “should” still be stable at 1000’ (although that’s a secondary consideration but screwing up the landing and going off the runway when you’ve made it that far). More info is available in the FCTM.