Automated FL bust detection?
Airbus have issued an FCOM revision advising that the selected altitude transmitted to the ground based ATC will include the wrong QNH when the aircraft is above the Transition altitude.
Excuse my ignorance here. This is all news to me.
Obviously our actual altitude is transmitted but according to the revision, the selected altitude (eg cleared to FL XX) is also transmitted? Apparently it's for the purpose of automated level busting detection.
What exactly do controllers or the automated equipment see -
Selected altitude & QNH, Actual aircraft altitude & QNH?
Is this ground based ATC/ level busting equipment in use widely?