So I was doing a flight EGLL-KIAH so after reaching the cruising altitude I left my phone and after maybe 10-15min I hear a stall warning all of a sudden and when I go check I’m rapidly loosing speed in a level flight
Mane you forgot to ATP the speed lock button in AP?
AND the winds after up?
What aircraft were you ušnih?
Also did you leave after leveling out or not?
I believe you should check fr24 flight to see the startimg cruising altitude Because if your weigt is heavier than the assigned cruising altitude then IT loses speed.
Happened to me once.
So the Plane has to gradually increase altitude so in 2 hours ascend 2K feet then so on.