SERA.15030 Controller data link
communication procedures for emergencies, hazards, and CPDLC equipment failure
Regulation (EU) 2023/1772
(a) When an air traffic controller or a pilot
is alerted that a single controller-pilot data link communication message has failed, the air traffic
controller or the pilot shall take one of the following actions, as
appropriate:
(1) via voice, confirm the actions that will be taken with respect to the
related dialogue, prefacing the information with the phrase: “CPDLC MESSAGE
FAILURE”;
(2) via controller-pilot
data link communication, reissue the controller-pilot data link communication message that
failed.
(b) Air traffic controllers that are required to transmit information
concerning a complete controller-pilot data link communication ground system failure to all stations
likely to intercept should preface such a transmission by the general call:
“ALL STATIONS CPDLC FAILURE” - followed by the identification of the calling station.
(c) When controller-pilot
data link communication fail and the communication reverts to voice, all CPDLC
messages outstanding shall be considered not delivered and the entire dialogue
involving the messages outstanding shall be recommenced by voice.
(d) When controller-pilot
data link communication fails but is restored prior to a need to revert to
voice communication, all messages outstanding shall be considered not
delivered and the entire dialogue involving the messages outstanding shall be
recommenced via CPDLC.
EASA aviation regulations mandate specific procedures for controller-pilot data link communication (CPDLC) failures. Upon message failure, voice confirmation or message re-issuance is required. Complete system failures necessitate "ALL STATIONS CPDLC FAILURE" broadcasts. Communication reverts require dialogue restarts, regardless of CPDLC restoration.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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