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AIM

10/12/17

5−3−8

En Route Procedures

TBL 5−3−11

Emergency/Urgency Downlink Message Elements (EMGD)

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

DM55 PAN PAN PAN

Note  − N response at-

tribute

N/A

Y

EMGD−1

Indication of an ur-

gent situation.

PAN PAN PAN

DM56 MAYDAY

MAYDAY MAYDAY

Note  − N response at-

tribute

N/A

Y

EMGD−2

Indication of an

emergency  situa-

tion.

MAYDAY 

MAYDAY 

MAYDAY

DM57 (remaining fu-

el) OF FUEL RE-

MAINING AND 

(remaining souls)

SOULS ON BOARD

Note  − N response at-

tribute

N/A

Y

EMGD−3

Report indicating

fuel  remaining

(time) and number

of persons on board.

(remaining fuel)

ENDURANCE

AND (persons on

board) PERSONS

ON BOARD

DM58 CANCEL

EMERGENCY 

Note  − N response at-

tribute

N/A

Y

EMGD−4

Indication that the

emergency situation

is cancelled.

CANCEL 

EMERGENCY

TBL 5−3−12

Standard Response Uplink Message Elements (RSPU)

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

UM0 UNABLE

UM0 UNABLE

N

RSPU−1

Indication that the

message cannot be

complied with.

UNABLE

UM1 STANDBY

UM1 STANDBY

N

RSPU−2

Indication that the

message will be re-

sponded to shortly.

STANDBY

UM3 ROGER

UM3 ROGER

N

RSPU−4

Indication that the

message is re-

ceived.

ROGER

3/15/07

7110.65R CHG 2

AIM

9/13/18