…or headwind.
Quiet possible as the displayed speed was ground speed.
What I want to know is whether trimming can cause such things? I had basic loadcontroller training and generally we have a range of trim index within which our actual trim should land in order for the aircraft to take off. For example for the said flight the schedule says it is 21.08 forward to 51.38 aft.
Can these extreme limits cause such cruise speed deviations?
Cheers….