History

Past service disruptions and maintenance events

25 April – 2 May 2011

No incidents

All systems operated normally during this period

18–25 April 2011

No incidents

All systems operated normally during this period

11–18 April 2011

No incidents

All systems operated normally during this period

4–11 April 2011

No incidents

All systems operated normally during this period

28 March – 4 April 2011

No incidents

All systems operated normally during this period