It's just my speculations that SQ777 haven't receive any ETOPS certification.
Singapore Airlines was going to send 777 from June, but they still using A340.
Either they haven't receive ETOPS, or they don't have enough 777ER.
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by NielsK:
would you care to elaborate on those specific issues and your source? SIN-ICN-YVR falls quite easily within ETOPS120.</font>