What is a yellow FMC MESSAGE?
ATC COMM is established or terminated.
Message in the CDU will appear
What is white ATC MESSAGE?
Uplink message for requested climb, offset, freq, or amended clearance. No message in the scratch pad.
What is amber MSG on P1 or P3
ATC COMM is established or terminated.
Message in the CDU will appear
Uplink message for requested climb, offset, freq, or amended clearance. No message in the scratch pad.