What is the ruling on working for a global company specialized in manufacturing equipment for civilian and military aircraft, and is that considered an unintentional contribution to the killing of innocents?

Working in civilian aircraft equipment factories is permissible. However, working in the military sector varies in ruling depending on the entity, the type of weapon, and the extent of the state's adherence to international laws. It is difficult to definitively rule it as forbidden or permissible without specialized study. Nevertheless, the Islamic legal principle is cooperation in righteousness and piety, not in sin and aggression. If the matter is difficult to ascertain, then caution dictates that a Muslim should abandon what causes doubt, because weapons are not allowed to be sold or manufactured for those who fight Muslims.