Thanks for the reply.
Using my company's flight planning system I have been running some route and flight planning scenarios on the LAX
legs. I used the A340-500 and B777-330ER. The Boeing has a problem even carrying 20,000lb payload on the eastbound leg.
I'll be on the SQ
flight later this month, hope to get some feedback from the crew on that days flight. Things such as payload, planned TOT fuel, zfw, take off weight etc. If I get it, I'll do a trip report.