AIM

8/15/19

5

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3

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5

En Route Procedures

TBL 5

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3

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5

Level Downlink Message Elements (LVLD)

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

DM6 REQUEST 

(alti-

tude)
Note 

−

 Used for a sin-

gle level

DM6 REQUEST
(

level

)

Y

LVLD

−

1

Request to fly at
the specified level
or vertical range.

REQUEST 

(level)

DM9 REQUEST
CLIMB TO

(altitude)

DM9 REQUEST
CLIMB TO (

level

)

Y

LVLD

−

2

Request for a
climb to the speci-
fied level or verti-
cal range.

REQUEST
CLIMB TO (

level

)

DM10 REQUEST
DESCENT TO 

(altitude)

DM10 REQUEST
DESCENT TO
(

level

)

Y

LVLD

−

3

Request for a de-
scent to the speci-
fied level or verti-
cal range.

REQUEST DE-
SCENT TO (

level

)

DM38 ASSIGNED
LEVEL 

(altitude)

Note 

−

 Used for a sin-

gle level

DM38 AS-
SIGNED LEVEL
(

level

)

N

LVLD

−

11

Confirmation that
the assigned level
or vertical range is
the specified level
or vertical range.

ASSIGNED LEV-
EL (

level

)

DM61 DESCEND-
ING TO 

(altitude)

Note 

−

 urgent alert at-

tribute

N/A

N

LVLD

−

14

Report indicating
descending to the
specified level.

DESCENDING
TO (

level single

)