Originally Posted by
sonicbum
RTA stands for Required Time of Arrival, it is not a "trick" and should be used for what it is meant to, i.e. cross a specific waypoint (or destination) at a specific time. I suggest You don't fall in those bad habits of some smart Captains you get to fly with, because the day you end up in overspeed and will have to file a report explaining that you were cruising at 0.81 without a valid reason there will be lots of tea and biscuits waiting for you at the safety office.
With that being said, I do not have the FCOM handy right now but most likely the speed restriction you inserted was disregarded because of the RTA.
thank you Sonic. appreciate the candor and agree.