Global operational data link gold

Global Operational Data Link Document (GOLD) F-11

Boeing

When a FANS uplink containing a concatenated end-service (um161) and ERROR (um159), the flight
crew will be presented with a display indicating a DOWNLINK ERROR.
While this construct is recommended in DO-258/ED-100, Section 4.6.2.2.2, it was not included in DO-
219, which is the basis of FANS designs. ATC should therefore avoid using this type of concatenated
message.

F.22 CPDLC connection after logon

Airbus

Boeing B747-400, B757, B767, B717, MD90, MD10, MD11 and B777 or B787 without FANS-2
Once an AFN logon has been performed, the airplane will accept a CPDLC connection request (CR1)
from any ATC Center. It is not required to be the center with which the AFN logon was performed.
Boeing B747-8, B777 and B787 with FANS-2
Once a CM or AFN logon has been performed, the airplane will accept a CPDLC connection request or
CPDLC start from any center.

F.23 ARINC 424 oceanic waypoints

Remarks
The Flight Management System on most airplanes will contain oceanic waypoints at whole degrees of
latitude and longitude (and potentially at half degrees) with names assigned using the naming
convention for such waypoints contained in ARINC 424.
Airbus

Boeing B747-400, B747-8, B777, B757, B767, B717, MD90, MD10, MD11

If the route constructed by the flight crew or data linked from the airline contains such waypoints, then
downlinked routes, position reports and requests for clearances (such as climbs or offsets) to start at a
waypoint on the route will contain the ARINC 424 waypoint names.

Boeing B787

Whole-degree waypoints of this type in the route will be converted to the equivalent latitude/longitude
for ATC downlinks.

GOLD Second Edition — 26 April 2013

F-12 Global Operational Data Link Document (GOLD)

F.24 STANDBY response to pilot-initiated downlink request

Airbus A320 & A330/A340 FANS A/A+

A 5 minutes timer is set whenever the aircraft downlinks a CPDLC pilot-initiated request message.
If a STANDBY uplink response message is received by the aircraft within 5 minutes of the time the
message was downlinked from the aircraft, the aircraft will accept any subsequent valid response
message.
If no response message is received within 5 minutes of the time the message was downlinked from the
aircraft, and if a STANDBY associated with the downlink message is received by the aircraft, any
subsequent message associated with the downlink message is rejected by the aircraft without being
displayed to the flight crew.

Airbus A380 FANS A+ Data link Recording and FANS A+B, Airbus A350 FANS A+B

Any valid uplink message responding to a CPDLC pilot-initiated request message is accepted as a
response and displayed to the flight crew, whether a STANDBY was previously received or not.

Boeing

Any valid uplink message responding to a CPDLC pilot-initiated request message is accepted as a
response and displayed to the flight crew, whether a STANDBY was previously received or not.

Second Edition — 26 April 2013 GOLD



© ICAO 2013 – GOLD