Generic Description
Incorrect data due to data corruption broadcast by the aircraft ADS-B transponder. The GPS unit in the aircraft is still operating correctly.
Hazard Cause/Initiating Events Significant error in the displayed position of the aircraft therefore could lead to a breakdown in separation without the controller being aware. This only impacts a single aircraft.
Initial Risk Residual Risk
Likelihood Remote Improbable
Consequence Cat 3 Cat 3 Risk D D
Existing Mitigation Controller observation of history trails for forward track jump
Safety Requirement Details
Safety Function for Route Adherence Monitoring processing (or similar) implemented in the ADS-B tracks automation system for ADS-B tracks.
Comprehensive Tested and proven ADS-B ground stations testing of ADS-B with comprehensive checking of integrity Ground System data (e.g. use of checksums in ADS B messages) are used for the trial
Training to cover Training must include the process and process to request procedures for requesting alternate alternate positional positional information from the pilot when data
Checking of ADS-B a/c Procedures shall be developed for cross ident checking of ADS-B positional data with data provided by other navigational systems (not GPS) in certain circumstances.
Parity check on data Ensure parity check is available for all data transmitted transmitted
ADS-B avionics Only avionics equipment certified to TSO
systems C129A plus FD&E for GPS navigator and TSO C112 (DO-181C) for Mode S transponder are used for all aircraft participating
Project ICAO SASPOperational Use of ADS-B in Non Radar Airspace
Hazard No. 4 Corruption of data by the ground station
Generic Description
Incorrect data displayed to controller due to data corruption at the ADS-B ground station.
Hazard Cause/Initiating Events
Error in the reported position of the aircraft therefore could lead to a breakdown in separation without the controller
being aware. This may affect all data.
Initial Risk Residual
Risk
Likelihood Improbable Extremely
Consequence Cat 3 Cat 3
Risk D D
Existing Mitigation Controller observation of history trail for forward track jump
Safety Requirement Details
Procedure to remove Developed and published procedure to corrupted ADS B data remove corrupted ADS B data from the ground system to ensure that the Flight Data Record is not updated.
Comprehensive Tested and proven ADS-B ground stations testing of ADS-B with comprehensive checking of integrity Ground System data (e.g. use of checksums in ADS B messages) are used
On-line integrity A site monitoring system shall provide a monitoring using site degree of on-line integrity monitoring. A monitor warning shall be issued to ATC if the site monitor is not received or indicates a low NuC value
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