A joint statement from Singapore's civil aviation authority (CAAS) and Changi Airport Group said that AirAsia had the necessary approvals to operate a daily flight between Surabaya and Singapore.
Yes from the Singapore side the approval paperwork was OK, we knew that already a few days ago. Apparently this is from the Indenosian side that the "Sunday" approval was missing. It is an interesting point if proven true, as far as availibility of the Met services at the departure airport , outside of normal airport operating hours on a Sunday.