AIM
6/17/21
DM63 NOT CUR
DM63 NOT
N
SYSD
−
3
System
−
generated
SYSD
−
3
RENT DATA AU
CURRENT
rejection of any
THORITY
DATA AUTHOR
ITY
CPDLC message
sent from a ground
facility that is not
the current data au
thority.
DM64
(ICAO facility
designation)
Note
−
Use by FANS
1/A aircraft in B1 envi-
ronments.
DM107 NOT
AUTHORIZED
NEXT DATA
AUTHORITY
Note
−
CDA and
NDA cannot be
provided.
N
SYSD
−
5
System
−
generated
notification that the
ground system is
not designated as
the next data au
thority (NDA), indi
cating the identity
of the current data
authority (CDA).
Identity of the
NDA, if any, is also
reported.
SYSD
−
5
En Route Procedures
5
−
3
−
12