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4.4.2.2.2 When the State of Registry legally adopts by reference the mandatory airworthiness information issued by the State of Design and does not provide its operators with that information, the State of Registry should assure that its operators have access to the mandatory airworthiness information and implement the required actions.
4.4.2.2.3 Some States assess all mandatory airworthiness information issued by States of Design and subsequently issue their own mandatory information. Such States should have the necessary expertise and human resources to do so. States of Registry should verify whether or not the mandatory airworthiness information is applicable to the aircraft on their registry and can be accomplished as intended. The aircraft may have been modified or had equipment installed without the type design organization or the State of Design being directly involved in that modification or installation approval.
4.4.2.2.4 When in receipt of mandatory airworthiness information for an engine or propeller which has a different State of Design to that of the aircraft, the State of Registry should ensure that it has received any associated mandatory airworthiness information from the State of Design for the aircraft. It must make a determination as to which one of the two is more appropriate to the specific operator. In general, the aircraft mandatory airworthiness information will only vary from that of the engine or propeller to account for specific features of the aircraft installation or operation in question.
4.4.2.2.5 Operators and States of Registry should be aware that some States of Design do not issue their mandatory airworthiness information in the form of Airworthiness Directives, and may instead give mandatory status to service bulletins, etc. by requiring the type design organization to include a statement in the service bulletins, etc. that the information has mandatory status for aircraft registered in the State of Design. Some of these States of Design publish summary lists of service bulletins, etc. which they have classified as mandatory.
4.4.2.2.6 This service information made mandatory by the State of Design should be clearly distinguished from service information that might be declared mandatory by the organization responsible for the type design. The type design organization may have classified the information as mandatory for reasons related to improving maintainability, inspectability, lifetime or for liability reasons.
4.4.2.2.7 The operator should accomplish actions made mandatory by its CAA, otherwise the aircraft is not considered airworthy. The operator should also carefully record the actions accomplished. If this is not done conscientiously, the operator may be in a difficult position when surveyed by the CAA and in terms of liability, especially in case of an accident. Proper documentation of mandatory actions will also enable a smoother transfer of aircraft.
4.4.2.2.8 If an operator wishes to comply in an alternative way or desires an extension of the compliance limit associated with mandatory airworthiness information, the approval of the airworthiness authority of the State of Registry must be obtained. For mandatory information issued by the State of Design and accepted by the State of Registry, the latter may not have sufficient knowledge or expertise to make an informed decision. In such cases, the State of Registry may wish to consult the airworthiness authority of the State of Design or accept advice from the type design organization.
4.4.2.2.9 On occasion, compliance with mandatory airworthiness information has to be effected at very short notice. Therefore, operators should be able to receive this information at any time (by telex, fax, email, etc.) and to develop the necessary actions.
4.4.2.3 Transmission to the State of Design of mandatory airworthiness information by other States
Annex 8, Part II, 4.2.3e) states:
“The State of Registry shall ensure the transmission to the State of Design of all mandatory continuing airworthiness information which it, as the State of Registry, originated in respect of that aircraft.”
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适航手册 AIRWORTHINESS MANUAL(78)
