6/17/21
AIM
TBL 5
−
3
−
13
Standard Response Downlink Message Elements (RSPD)
CPDLC Message Sets
Operational Definition in PANS
−
ATM (Doc 4444)
FANS 1/A
ATN B1
Response
Message
Element
Identifier
Message Element
Intended Use
Format for
Message Element
Display
DM0 WILCO
DM0 WILCO
N
RSPD
−
1
Indication that the
instruction is under
stood and will be
complied with.
WILCO
DM1 UNABLE
DM1 UNABLE
N
RSPD
−
2
Indication that the
message cannot be
complied with.
UNABLE
DM2 STANDBY
DM2 STANDBY
N
RSPD
−
3
Indication that the
message will be re
sponded to shortly.
STANDBY
DM3 ROGER
Note
−
ROGER is the
only correct response
to an uplink free text
message.
DM3 ROGER
N
RSPD
−
4
Indication that the
message is re
ceived.
ROGER
TBL 5
−
3
−
14
Supplemental Uplink Message Elements (SUPU)
CPDLC Message Sets
Operational Definition in PANS
−
ATM (Doc 4444)
FANS 1/A
ATN B1
Response
Message
Element
Identifier
Message Element
Intended Use
Format for
Message Element
Display
UM166 DUE TO
TRAFFIC
N/A
N
SUPU
−
2
Indication that the
associated message
is issued due to the
specified reason.
DUE TO
(specified reason
uplink)
UM167 DUE TO
AIRSPACE RE
STRICTION
TBL 5
−
3
−
15
Supplemental Downlink Message Elements (SUPD)
CPDLC Message Sets
Operational Definition in PANS
−
ATM (Doc 4444)
FANS 1/A
ATN B1
Response
Message
Element
Identifier
Message Element
Intended Use
Format for
Message Element
Display
DM65 DUE TO
WEATHER
DM65 DUE TO
WEATHER
N
SUPD
−
1
Indication that the
associated message
is issued due to the
specified reason.
DUE TO
(specified reason
downlink)
DM66 DUE TO AIR
CRAFT PERFOR
MANCE
DM66 DUE TO
AIRCRAFT PER
FORMANCE
En Route Procedures
5
−
3
−
9