2.1.1 A determination shall be made that the design features for a new transport category type design aeroplane intended to be used in ETOPS are suitable for such operations. In the event that an existing aeroplane's operation is expanded to include ER operations, a re evaluation of some design features may be necessary.
2.1.2 Modifications to some systems may be required to achieve the desired reliability. In both cases essential systems and propulsion systems for the particular airframe engine combination will be shown to be designed to fail safe criteria and to have achieved a level of reliability suitable for the intended operation of the aeroplane.
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