Originally Posted by
Alex Whittingham
On the L1011, for instance, nearly everyone had RB211-524B4 engines but just by chance one airline, BWIA, had ordered the the jets with RB211-22B engines, a lower rated thrust. That meant we could manually set the EPR for the derated thrust, accompanied by severe warnings about selecting full TOGA thrust in emergency and great oaths not to do so in the take-off brief - no automatic protection then.
Hi Alex, The only “automatic” protection we had was the Flight Engineers hairy hand.
Unless you changed the SOPs so that crews could not select Full Power in the event of an engine failure until above AA and above X kts (VMCA), then Flex power take offs (Reduced thrust, Assumed Temp etc) can not be permitted if you are taking advantage of a reduced VMCG / VMCA.