History
Past service disruptions and maintenance events
26 December 1977 – 2 January 1978
✨
No incidents
All systems operated normally during this period
19–26 December 1977
✨
No incidents
All systems operated normally during this period
12–19 December 1977
✨
No incidents
All systems operated normally during this period
5–12 December 1977
✨
No incidents
All systems operated normally during this period
28 November – 5 December 1977
✨
No incidents
All systems operated normally during this period