Effective July 5, 2007 Chester County/G.O.Carlson Airport has been changed from 40N to MQS.
When will we be able to use MQS as our indentifier with flightaware?
That’s a good question. I was wondering the same thing, did a search and found your thread. 
PJ
Quite a few discussions on this.
discussions.flightaware.com/view … identifier
discussions.flightaware.com/viewtopic.php?t=113
discussions.flightaware.com/view … identifier
discussions.flightaware.com/view … identifier
discussions.flightaware.com/view … identifier
Instead of putting this in the “Feature Requests and Ideas” section, it should, it my opinion, be in the “General” section because it isn’t really a request for a new feature. Ideally, there would be an “Airport” section to put this type of question in.