TO and Climb derate
Had a funny one at DXB a few years back.
It was Feb/March and we were not aware of a very pronounced low-level inversion. As far as I can remember temperature diff was almost 15 deg C! That is to say it went from 15 to almost 30 by 2000' AGL.
We were at about 160 tons on a B763 with GEs rated at 60.000.
AP was engaged before V-NAV.
When we selected V-NAV with a preselected Climb 1 derate power came so far back that we actually lost about 100' before we disconnected AP and reapplied THR manually.
Never again used Climb derate when heavy enough! Don't give s--t about SOP's.
Anybody else experienced something like this?
Comments from the "sandpit" guys most welcome!
Tnx!