New safety data released for May – July 2024

New CANSO Safety Dashboard metrics are out for the period of May – July 2024. The increase in TCAS in North America coincides with the increase in summer general aviation traffic. This global chart with 12 months history clearly indicates this uptick in the summer months with a decrease in cooler weather and less GA flights.

Following the launch of the Aireon Safety Dashboard, CANSO Members now have access to an exclusive, monthly global summary of Safety data via the new CANSO Safety Dashboard – powered by Aireon.

Available on myCANSO, CANSO Members’ exclusive online portal, the dashboard provides global date on three safety categories. They are:

Traffic Alert and Collision Avoidance System Resolution Advisory (TCAS RA)

In a TCAS RA event, the pilot is issued an audible command to climb or descend according to automated aircraft conflict detection. This is considered the last line of defence in avoiding midair collisions. A consistent presence of these events in specific geographic areas may indicate a systemic issue.

The data available for CANSO Members show the rate of TCAS RAs (number of occurrences per 10,000 flights) per CANSO region. 

Risk of Runway Overrun (RORO)

The Risk of Runway Overrun (RORO) metric identifies risk of runway excursion during landing. To capture this metric, Aireon data is used to identify the position on the runway at which the aircraft first slowed to 50 knots during the landing roll. Geographic runway data is then used to determine the distance from that point to the end of the runway, and this value is determined for every landing.

CANSO Members can view graphs which show the number of RORO events per 100,000 landings per CANSO region, aggregated where needed to safeguard against ANSP identification.

Rejected Takoff (RTO).

These are incidents in which an aircraft initiates a takeoff roll and then aborts, remaining on the runway throughout the incident. These are higher risk incidents triggered by unexpected traffic, equipment failures, environment events and other causes. The Safety Dashboard algorithm to identify these incidents requires the aircraft speed to exceed 60 kts on a runway without becoming airborne. These incidents are per 10K flights categorised by the same cohorts as the previous three metrics. This additional metric will continue to provide trend data to help ANSPs gain insights within a specific region/cohort.

Emergency Squawk Codes

Aircraft may broadcast squawk distress according to the following codes:

• 7400 – autonomous vehicle lost link
• 7500 – hijacking
• 7600 – lost communications
• 7700 – emergency

CANSO Members can view global data regarding the number of 7600 and 7700 emergency squawk events per 10,000 flights, per CANSO region.