History
Past service disruptions and maintenance events
27 December 1976 – 3 January 1977
✨
No incidents
All systems operated normally during this period
20–27 December 1976
✨
No incidents
All systems operated normally during this period
13–20 December 1976
✨
No incidents
All systems operated normally during this period
6–13 December 1976
✨
No incidents
All systems operated normally during this period
29 November – 6 December 1976
✨
No incidents
All systems operated normally during this period