Two Crewmen Required? Both are crew
When the helo is certified, a determination is made by regulators as to whether a single pilot can properly perform all the operational tasks. If not, two crew are specified. The second crewperson is not a trainee or camp-follower, he or she is to perform critical functions in keeping with the flight manual and the operations manual. Success depends on the outcome. That co-pilot must be reasonable trained and certified so that the passengers are safe.