Uncommon Sense and others,
The issue that presents itself is that the flight plan will always be planned at ECON no matter what the level may be. Therefore with say a CI of 15 up at FL410 you may get a M.77 CRZ while down lower at FL260 or thereabouts it will drop it back to M.64 in the interests of fuel conservation.
The problem lies when the drivers blast off and reach a planned CRZ LVL of FL260 for example and see that the CI is only giving them M.64 that they then intervene and wind up the speed on their accord.
A headache for you guys as whatever was planned to go through MAESTRO you may as well discard. To top it off some drivers then question why the planned fuel burn was different from actual
The drivers get the same copy as is punched through the ATS system via the AFTN.
Hope this helps
Here is a question for you guys (ATC) now. If we ask an aircraft enroute to make best speed due curfew or whatever then what is the best way to inform ATC of the new TAS? Via a CHANGE MSG? I don't know if that would apply for an already airborne aircraft.
Look forward to your replies
