Data Link Confusion in the Cockpit Meetings Seminars...Data Link Confusion in the Cockpit Chuck...
Transcript of Data Link Confusion in the Cockpit Meetings Seminars...Data Link Confusion in the Cockpit Chuck...
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Data LinkConfusion in the Cockpit
Chuck StewartChief Technical Pilot, Communications17 June, 2015
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Data Link Issues
IssuesoTerminologyoCockpit Configurations
• B767 vs B777oRCP/RSP Compliance
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Terminology
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Terminology
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ATCCLEARED ROUTE CLEARANCE
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Terminology
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Terminology
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TerminologyRequires Training and Defined SOPs
oFor Example• Select LOAD prompt and PRINT new route.• Use PLAN mode and identify new routing.• Discuss new routing and if acceptable, copy down.• Select ACCEPT prompt.• Select REJECT if new route is not acceptable.• Return to the MOD RTE page.• Select ACTIVATE and EXEC
Effects on PORT?
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TerminologyOther examples
oConfusion between controller and pilots without voice
• Conditional clearances Cleared to FL350 at 30W Prior to 30W, cleared to FL330 Is the conditional clearance still valid?
• Simple Climb to FL350 (without an appended reason; e.g. “for traffic”) Is it directive – pilots have a reject prompt
oHave had crews not acknowledge a frequency change
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Terminology FAA is currently conducting “DCL” trials in Memphis and
Newarko Uses FANS CPDLC to request clearance (UM25)
Europe also accepts DCL requests but through ACARS 623 Consequence at MEM and EWR Trials
o Successful log-on but pilots are then going to ACARS to request clearance.
o They do not receive the DCL and have to revert to voice
Operators pushed hard for terminology change.o Ended up with CPDCL DCL
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Cockpit Configuration B767 vs B777
B767oDisplay is limited
• First page often will be confusingoFMS to printer interface is corrupted in some
configurationsB777
oDisplay is large and easily interpreted
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B777 Display
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Other Issue
Gold Performance Standardso Required Communications Performance (RCP) and
Required Surveillance Performance (RSP)• Eventually will be used as basis for reduced
separation• Crews need to be knowledgeable on the effect of
PORT• Not easy to determine cause if not meeting
performance Aircraft avionics, media switching, ground
station performance, satellite performance, etc
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Thank You