Wind limitations during engine start.
Hi
I got some information regarding engine start of the CFM56-5A3. This engine is fitted on the A320, so the informartion is taken from the A320 AMM (Aircraft Maintenance Manual).
Maximum tailwind is 10 knots. With tailwind from 5 - 10 knots maximum N1 is limited to 70%, 2 - 5 knots it is 85% N1 and 0 - 2 knots it is 90% N1.
I hope these informations can help you.