Rule 10.7 determines the result of hits based on the type of unit the target belongs to, which the rules establish as 4. To my surprise none of which is aircraft or air units (as opposite to ground units). The 4th is CAS but seems tailored specifically for CAS. Helicopters are mentioned in a Note under 10.7.1 Results vs Ground Units, but the only times they are treated as ground units is when they have landed, and possibly when NOE in 0 heigh obstacle level terrain. And also mentioned in 10.7.3 if they are transport units, and mostly to rule the indirect effect of hits on their passengers. Which means there is no specific mechanic that details the effects of Combat on aircraft, namely helicopters. Although I can adjudicate or interpret 10.7.1 as being the default combat result to combat units, ground or otherwise, it would be great if there was a specific mention to aircraft that either merits a specific designation as a type of unit or specifically identified as applying the same rules as ground units (10.7.1).