Hazard No. 7 Failure of ADS-B processing subsystem
Generic Description
Failure of the ADS-B processing subsystem in the ground system.

Hazard Cause/Initiating Events
ADS-B tracks will not be displayed on the controller HMI therefore will cause an increase in workload due to the 
requirement to transition back to procedural control.

  Initial Risk  Residual 
Risk 
  Likelihood  Occasional  Improbable 
  Consequence  Cat 3  Cat 3 
  Risk  C  D 
Existing Mitigation 

Safety Requirement Details 
ADS-B Fallback  Validated and published instructions   procedure for reverting back to procedural control 
Transition Process for  Training and lesson plans to adequately   ADS-B Failure cover the transition process and procedures    from ADS-B control to procedural control
High reliability  The ADS-B processing sub-system   requirement for  with MTBF requirement of at least 30 years  ADS-B  and MDT of equal of less than 2 hours subsystem
Project  ICAO SASPOperational Use of ADS-B in Non Radar Airspace
Hazard No. 8 Inadequate ATS Training
Generic Description
Introduction of new ADS-B function is new to ATS and inadequate training will introduce a hazard to the system.

Hazard Cause/Initiating Events
Insufficient training in the areas of HMI, new procedures and transition from ADS-B control to procedural control may 
increase the probability of breakdown in separation.

  Initial Risk  Residual 
Risk 
  Likelihood  Occasional  Remote 
  Consequence  Cat 3  Cat 3 
  Risk  C  D 
Existing Mitigation Training standard manual exist and is required to be followed. 

Safety Requirement Details 
Integration of ADS-B  Ground automation system to process and   data with FDP integrate the ADS-B data with existing FDP   function and display the ADS-B tracks with a   unique symbol on the controllers display.
ADS-B Training  Provision of an ADS-B training system   System capability on the Eurocat simulator.
Ergonomic  Ergonomic performance is consistent and   performance  comparable with existing ground system consistent with  automation system
Use proven and  ADS-B HMI is consistent with current ground   consistent HMI HMI with ability to deselect all ADS-B data
Provide ADS-B  Training and lesson plans to support air   training capability traffic control of  ADS-B equipped aircraft in    non radar airspace
Transition Process for  Training and lesson plans to adequately   ADS-B Failure cover the transition process and procedures    from ADS-B control to procedural control
Project   ICAO SASPOperational Use of ADS-B in Non Radar Airspace
Hazard No. 9 Flooding of the ADS-B messages
Generic Description
Flooding of the ADS-B broadcast messages caused by multiple transponders transmitting at the same time.

Hazard Cause/Initiating Events
A loss of positional data (update) during the period of flooding. Increase workload for control in reverting to
procedural 
control

  Initial Risk  Residual 
Risk 
  Likelihood  Remote  Improbable 
  Consequence  Cat 3  Cat 3 
  Risk  D  D 
Existing Mitigation 

Safety Requirement Details 
Proven ADS-B Ground Use tested and proven ADS-B ground   Stations to handle at  stations that can handle at least 200  least 200 reports airborne reports.
　
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