Old Smokey wrote
During the asymptotic flare from Climb to Cruise mode, you may note that the Auto-Throttle annunciator remains in THR mode (There is no mixed THR and SPD mode).
The Modes change from
THR REF VNAV SPD to
SPD VNAV PTH to level off the aircraft. The number of seconds this happens before the FMC Active FL naturally depends on the ROC but in my experience it always changes to
SPD VNAV PTH.
I've never heard of "asymptotic flare" what is that exactly?
I've never seen the A/T stay in
THR mode while capturing an ALT.
I'm not saying you're wrong but in nearly 7 years on the 777 I've never seen that.