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ATM network performance: Brisbane

Airborne delay

The 75th percentile performance figures for airborne delay at Brisbane are indicated in Figure 6.

April performance (3.6 minutes) did not meet the target (3.5 minutes) and delay was higher than during the same period last year (3.5 minutes). The long-term trend for airborne delay at Brisbane is downwards.

Figure 6: Brisbane airborne delay 75th Percentile

Click image to enlarge

Notable events

16 April (1900-2000 Local)

  • Increased airborne delay was experienced during the evening peak period.
  • A number of late non-compliant flights concentrated demand into the busy period and resulted in increased airborne delay.

20 April (1600-2100 Local)

  • Increased airborne delay was experienced during the evening period due to a weather event that did not clear as quickly as initially forecast.
  • A Level 2 GDP Revision was undertaken to lower acceptance rates and realign demand.
  • The increased delay was also exacerbated by non-compliance and other off-schedule departures which altered the expected sequence into Brisbane.
  • A number of conclusions can be found in the detailed Post Operational Performance Review of this event in Appendix A. In particular, the time elapsed during the consultation and approval of the revision did not allow enough time for aircraft to absorb the delay while still on the ground.

22 April (1600-1700 Local)

  • Increased airborne delay was experienced during the evening peak period.
  • A number of late non-compliant and GDP-exempt flights concentrated demand into the busy period resulted in increased airborne delay.

29 April (1800-1900 Local)

  • Increased airborne delay was experienced during the evening peak period.
  • A number of late non-compliant flights concentrated demand into the busy period and resulted in increased airborne delay.