What the CAA wants
Hi guys,
it seems to me that Tene got it right. You are getting into a technical discussion about controlability of an aircraft in various conditions (throttling back etc.) Nevertheless, there is only ONE definition of VMCA laid out in aircraft certification requirements, and that's the one Rene dug out, and that's what the CAA want to know. It sets certain conditions under which VMCA is measured. Sort of compare it to all your performance tables, where it always says "associated conditions"
As a comparision, for those who heve not flown twins yet, take the VSO for a cessna 172. it is defined as the stall speed in straight and level flight at max gross weight and full flaps. This also is the lower limit of the white arc on the ASI. Now that was the definition. take a 172 up, alone, full flaps, on a cold winter day, and she'll stall way below that. that is the ACTUAL stall speed for your conditions. But VSO is still the one as defined.
Hope that was clear, exams are about the legal definitions, unless otherwise stated. All exam technique... You'll get used to it before the big day comes, don't worry, we've all been there.