Hi
I completed a Concorde flight yesterday EGLL -KJFK. PFE was great and the accents in NY were superb. The selcal worked perfectly and I am very glad I bought this product.
I filed my plan with a FL550 ( about as high as I get on this route), and was able to perform the initial subsonic 28,000 feet cruise without being nagged by ATC before climbing in cruise climb.
However at FL550 about 200 nm from KJFK i need to perform a deceleration and 350 KIAS descent to 14,000 feet. I tried to ask ATC to change my altitude using the "L + number" method, but could not get it to work. The request to atc would always be as if I had just pressed the number key.... "L+2" would give me ACARS for example.
I did check the key assignments in PFE and "L" and "H" are listed as active.