Internet, mobile and early check-in will not be available for all flights departing on 8 and 9 July Singapore local time1. Customers should bring a printed copy of their electronic ticket to the airport for check-in. Counters will open 3 hours before the scheduled time of departure for SIA flights and 2 hours before departure for SilkAir flights.
http://www.nation.lk/edition/biz-news/item/7864-sia-and-silkair-to-upgrade-reservations-system.html