Descent AP mode: FLC vs VS
The aircraft I'm about to fly is a slow aircraft, with a VMO of 250KIAS/.63M, there is no auto-throttle, and it will be in single pilot operation
In some busy TMA's (such as Paris) the ATC often expects you to fly at 250kt (or even more) during your descent ;
The operator's Operating Manual says that climb should be in FLC mode (seems safe to me) and descent in VS mode.
I think that a descent in FLC mode would unable the pilot to keep a speed of say 240kt, without the risk of busting the VMO, and hence accommodate ATC, during a high workload part of the flight.
In VS mode, you must constantly adjust thrust to keep close to 240kt.
In FLC mode the descent rate would be tuned with the Thrust Lever. A poor monitoring would have little consequence, it would just require a higher Thrust variation to get back to the desired descent path. In case of very high workload, you would set the thrust on the low side, and then reach you target altitude a little to soon, without any safety consequence.
What do you think?