Keg
I was on your 767 if it was QF443 at 3:00pm last Thursday - I noticed the same thing. MAS took such a long lumbering climb I thought he must have been bunkering fuel or some such thing . . . and two out the four engines were quite dirty.
Nice flying by the way . . . were you the FO standing at the cockpit door smiling to the departing SLF?
Cheers
Pedota