The 75th percentile performance figures for airborne delay at Brisbane are indicated in Figure 10. September performance did not meet the target for the median (1.3 minutes) or the 75th percentile (3.9 minutes). Compared to the same month last year, there was an increase in the airborne delay median performance (from 1.2 minutes) and a decrease in the 75th percentile (from 4.1 minutes).
Figure 10: Brisbane airborne delay 75th percentile (last 24 months)
Table 6 describes the notable airborne delay events during September in Brisbane.
(minutes – 75th percentile)
(Contributing causes to increased delays)
|5 September||19-20||4.3||No GDP. Period of planned single runway operations with winds.|
|10 September||18-19||6.8||Period of planned single runway operations with turbulence and uncertain wind direction.|
|17 September||17-19||5.3||Forecast thunderstorm. Concentration of demand due to off-schedule internationals and non-compliant flights.|
|26 September||19-20||4.0||Period of planned single runway operations. Concentration of demand due to off-schedule internationals and non-compliant flights.|
|28 September||16-17||3.0||Forecast thunderstorm. Riverfire displays. Concentration of demand due to off-schedule internationals and non-compliant flights.|
|30 September||08-09||6.3||Reduced visibility lowered tactical Rates longer than planned.|
Table 6: Notable event descriptions for Brisbane.