Safety Requirement Details
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 Procedure for RAIM Ensure satellite outages are taken into predictions and account in RAIM and ensure procedures updates (distribution of RAIM predictions and updates) and instructions available
(including
training)
Project ICAO SASPOperational Use of ADS-B in Non Radar Airspace
Hazard No. 20 Human error at Mode S transponder - turn off
Generic Description Human error at Mode S transponder leading to the unit being switched off or in the wrong mode. The impact is possible loss of ADS B data. Identical hazard existed in radar.
Hazard Cause/Initiating Events Loss of ADS-B positional data to the controller. Increase in workload due to transitioning period back to procedural control and reassess traffic.
Initial Risk Residual Risk
Likelihood Occasional Occasional
Consequence Cat 3 Cat 4 Risk C D
Existing Mitigation This only applies to aircraft where pilot has access to the transponder unit. For some installations, the unit is
installed in a position where the pil ot has no access.
Safety Requirement Details
Pilot training Ensure pilot handbook, procedures and training minimise the potential for human error
Training to cover process to request alternate positional data Training must include the process and procedures for requesting alternate positional information from the pilot when required
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
ADS-B Fallback Validated and published instructions procedure for reverting back to procedural control
Project ICAO SASPOperational Use of ADS-B in Non Radar Airspace Hazard No. 21 Human Error - at Mode S transponder - in wrong mode Generic Description Setting the transponder to the wrong mode - on ground - causing no altitude being sent by the squitter. Hazard Cause/Initiating Events Incorrect altitude display to the controller.
Initial Risk Residual
Risk
Likelihood Probable Occasional
Consequence Cat 4 Cat 4
Risk D D
Existing Mitigation
Safety Requirement Details
Pilot training Ensure pilot handbook, procedures and training minimise the potential for human error
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
Project ICAO SASPOperational Use of ADS-B in Non Radar Airspace
Hazard No. 22 Fail Altitude encoder
Generic Description Fail altitude encoder causing a reduced ability to obtain approach RAIM if we don't have a very high Q VFOM
Hazard Cause/Initiating Events Loss of ADS-B positional data to the controller. Increase in workload due to transitioning period back to procedural control and reassess traffic.
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