@Homsap:
The RAF Chinook accident, from Belfast to Inverness, which flew into the Mull of Kintyre with very important passengers, in poor weather, why had they not planned to climb to MSA upon poor weather?
Without wishing to divert from the current thread. ZD576 has too many unknowns to be a good example. But in short they couldn't because MSA was outside the then icing clearance.
EG