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Global Data Link Issues,
Data Link System Testing
PRESENTED BY: Mike Mitera
Chicago Jet Group and Kobev International
Monday, March 21, 2016 | 3:30pm – 4:45pm
International Operators Conference | San Diego, CA | March 21 – 24, 2016
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Global Data Link Issues
• Flight plan on file MUST match the registration or the Call
sign when logging on
– Aircraft identification – field 7
– 7 characters (max)
– Aircraft registration number or Call sign
– ICAO designator for aircraft facility followed by the flight ID (N800DW)
– Three letter call sign followed by the flight ID (WDY800) Windy City 800
• Use of the “DCM” call sign (Dot Com) with Fltplan.com
• Flight plan must have the correct equipment codes in fields
10 and 18
Filed flight plan issues
Sources: Kobev International and ICAO (PANS-ATM 4444)
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Sources: Fltplan.com
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Sources: Kobev International
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Global Data Link Issues
• Flight Crews must use the correct AFN log on code for the ATSU,
after the aircraft enters the CPDLC airspace for that ATSU
• Some FANS systems do require manually entries
– Flight levels
– Forecast winds aloft
– Route changes
• Flying the assigned speed that was cleared by ATC
– Mach Number vs.
– Mach Technique
Operator error issues
Sources: Kobev International
6
Global Data Link Issues
• Flight Crews should not enter equal time points into the active
flight plan on the FMS
• Read the entire up link message and use proper CRM to
respond to ATC
• Allow ATC to terminate the data link connection with the aircraft
• Check the ICAO Regional Guides before your flight
• Test the data link system after maintenance or before a flight
into CPDLC airspace
Operator error issues
Sources: Kobev International
7
Global Data Link Issues
• Gander Oceanic will soon be using um137 “CONFIRM ASSIGNED ROUTE”
– The correct response is a dm40. Free Text Response is NOT ACCEPTABLE
• CPDLD request for “Position Report” in Canadian Domestic airspace
– MESSAGE IS NOT SUPPORTED
• Data Link Clearance (DCL) at US airports
– Must have “DAT/FANS1P2PDC” in field 18 of your flight plan
– Any free text sent during DCL request will cause the system reject the request
– Tower will “Push” the clearance at P-30 or later depending on tower work load and
conditions
System/Equipment issues
Sources: Kobev International and FAA CPDLC User’s Guide Version 2.0 and Nav Canada
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Data Link testing
• Who does Data Link Testing?
– Kobev International and some Data Link Service Providers
• What is Tested ?
– AFN Log On
– CPDLC messages and RCP 240 performance
– ADS-C content and RSP 180 performance
• Where is testing performed?
– Either on the ground or in flight
Who, What, Where, When and Why ?
Sources: Kobev International
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Data Link testing
• When should a Data Link System be Tested?
– Original Certification Aircraft for STC Approval
– Follow on aircraft for post installation Verification
– In Service Aircraft for post maintenance Verification
– After starting service with a new Data Link Service Provider
– Pre-Flight check prior to entering CPDLC airspace
Who, What, Where, When and Why ?
Sources: Kobev International
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Data Link testing
• Why should a Data Link System be Tested?
– To verify the installed equipment can perform an AFN Log On
– To verify the CPDLC and ADS-C connections can be established
– To verify the CPDLC and ADS-C (A,L,V,W) interoperability
– To verify the RCP 240 and RSP 180
– To verify the ADS-C content is being transmitted/received correctly
– It verifies that the installation/maintenance was done correctly and the service
provider has set up the data link service correctly as well
– Reduces the risk of potential flight crew violations in the CPDLC airspace
Who, What, Where, When and Why ?
Sources: Kobev International
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If you have a Sat Phone installed in the cockpit of your aircraft
does this mean you can indicate compliance with:
• M1 SATCOM ATC (INMARST)
• M2 SATCOM ATC (MTSAT)
• M3 SATCOM ATC (IRIDIUM)
in the equipment codes of field 10 or your ICAO flight plan?
YES or NO
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The answer is….NO.
The installed Satcom voice system must
meet compliance with AC 20-150B and you
must have a Letter Of Authorization (LOA)
to use the system for SATVOICE
communications with Air Traffic Services.
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• FANS systems installation or FANS STC’s
• FANS Pilot Training
• FANS system Testing
• LOA assistance
Mike Mitera
630-699-3533
