This standard specifies requirements and determination methods for newly certificated commercial passenger aircraft programmes.This standard applies to newly certificated commercial passenger aircraft programmes. It may also apply to current production aircraft if it does not carry significant penalties, i.e. if it can be shown to be technically feasible and economically justifiable.This standard covers the period from first crew embarkation to last crew disembarkation.NOTE 1 During embarkation and disembarkation, reduced temperatures in the cabin may be desirable due to increased metabolic activity of the occupants. In some ground cases, the aircraft envir