David, a couple of 744s that have been retired (OEC and OED) both operated to LAX as revenue services before a tag-leg out to VCV. As the 767s can't operate transpacific to LAX or SFO nonstop in normal operations, they obviously can't operate a revenue service, let alone the restriction of the on-board product. I suspect the 767s are carrying ferry tanks in place of seats on these services -- the SYD-VCV has lately been operated non-stop. When the 747 Classics were retired, which have a slightly greater range than the 767s, they had a tech stop in HNL. From memory, the 762s also had this HNL stop even though they too can outlast the 763 range-wise.
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