The 75th percentile performance figures for airborne delay at Sydney are indicated in Figure 8. March performance for the median (1.3 minutes) and the 75th percentile (5.1 minutes) did not meet the targets. Compared to the same month last year, there was an increase in the airborne delay median performance (from 0.8 minutes) and 75th percentile performance (from 4.3 minutes).
The long‑term (48-month) and 24-month trends for airborne delay at Sydney are upwards.
Figure 8: Sydney airborne delay 75th percentile (last 24 months)
Table 2 describes the notable airborne delay and other events during March in Sydney.
(minutes – 75th percentile)
(Contributing causes to increased delays)
|05 March||07-08||3.0||Concentration in demand due to off-schedule international flights during morning peak period.|
|06 March||15-16||6.1||Reduced capacity in mid-afternoon due to thunderstorms and strong winds.|
|07 March||07-09||7.1||Reduced capacity during morning peak period due to strong winds. Tactical rates reduced.|
|09 March||08-09||5.4||Reduced capacity during morning peak period due to strong winds. Tactical rates reduced.|
|13 March||07-08 &
|8.7||Concentration in demand during the morning peak period due to off-schedule international flights.
Concentration in demand in the peak evening period due to longer than anticipated flight times.
|14 March||07-09 &
|16.4||Reduced capacity in the morning due to heavy showers. Tactical rates reduced.
Reduced capacity in the afternoon and evening due to multiple thunderstorms. Level 1 GDP Revision at 1600L with rates reduced.
|15 March||08-09||5.9||Concentration in demand due to late non‑compliant and off-schedule internationals flights during morning peak period.|
|16 March||07-11||15.4||Reduced capacity in the morning peak period due to thunderstorms. Level 1 GDP Revision at 0945L to extend the GDP until 1300L (rates reduced).|
|17 March||18-20||9.5||Concentration of demand during the evening peak period due to late non-compliant flights.|
|19 March||18-19||8.8||Reduced capacity during the evening peak period due to heavy showers. Tactical rates reduced.|
|21 March||07-10||9.0||Reduced capacity in the morning peak period due to low cloud and heavy showers. Tactical rates reduced.|
|22 March||07-10 &
|7.8||Concentration in demand due to off-schedule international flights during morning peak period.
Reduced capacity during the evening peak period due to heavy showers. Tactical rates reduced.
|23 March||10-11||4.1||Reduced capacity due AUSCAL operations. Tactical rates reduced.|
|24 March||13-15||10.0||Concentration of demand due to late non-compliant and medical flights during a period of reduced capacity (low rates due to AUSCAL operations).|
|27 March||08-09||6.6||Concentration in demand due to off-schedule international flights during morning peak period.|
|29 March||12-13||4.2||Reduced capacity due to Sydney tower evacuation in response to fire alarm. Tactical rates reduced while tower staff relocated. A ground stop for flights to Sydney was implemented at 1048L. Level 3 GDP Revision was conducted at 1155L with rates reduced. A Level 1 GDP Revision was conducted at 1325 to increase rates back to original capacity.|
|30 March||17-18||5.5||Concentration due late non-compliant during low capacity period (extended single runway operations).|
Table 2: Notable event descriptions for Sydney.