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d) Consideration should be given to the effect of WDCPs on other parts of the aircraft such as electrical components, hoses, filters, etc., to their environmental effects and to the safety of personnel applying them.
e) Some solvent-based WDCP fluids may flush out lubricants, so caution should be exercised, particularly to avoid removing the lubrication from control cables which could lead to high wear rate or even failure.
4.3.9.6 In summary, if the product is recommended by the type design organization or if the operator and airworthiness authority agree that the product is satisfactory for the intended use and it is applied using an appropriate standard, then the service life of the aircraft should be enhanced.
4.4 Exchange and use of continuing airworthiness information
4.4.1 Introduction
4.4.1.1 Aircraft are designed and certificated to airworthiness standards. In service, however, faults, malfunctions, defects and other occurrences (service difficulties) may be experienced. To satisfy their responsibilities under the Convention on International Civil Aviation, it is essential that States of Registry are kept informed of service difficulties by their operators and maintenance organizations.
4.4.1.2 Furthermore, it is also essential that the type design organization and the State of Design are kept informed of service difficulties. The type design organization, receiving this kind of information from all operators of the type of aircraft, is in the best position to develop recommendations to solve the problems of the aircraft in service. The State of Design, being the certificating authority of the type of aircraft will, if necessary, make these recommendations mandatory and initiate changes to the airworthiness requirements, if appropriate.
4.4.1.3 The recommendations (service bulletins, etc.) issued by the type design organization and the information made mandatory by the State of Design (airworthiness directives, etc.) should be obtained by all operators and their authorities and appropriate actions taken.
4.4.1.4 Because it is clear that a proper exchange and use of continuing airworthiness information is essential for the continuing airworthiness of aircraft, relevant requirements are incorporated in Annexes 6 and 8 to the Convention on International Civil Aviation.
4.4.1.5 This part of the manual provides guidance material on these requirements. Section 4.4.2 below provides guidance on mandatory airworthiness information, while Section 4.4.3 provides material on other airworthiness information.
4.4.2 Mandatory airworthiness information
4.4.2.1 Mandatory airworthiness information to be transmitted by the State of Design
4.4.2.1.1 Annex 8, Part II, 4.2.1.1 states:
“The State of Design of an aircraft shall …transmit to every Contracting State which has in accordance with 4.2.3a) advised the State of Design that it has entered the aircraft on its register, and to any other Contracting State upon request, any generally applicable information which it has found necessary for the continuing airworthiness of the aircraft, including its engines and propellers when applicable, and for the safe operation of the aircraft (herein called mandatory airworthiness information) …”
Note 1.— In Annex 8, Part II, Note 1 to 4.2.1.1 states that the term ‘mandatory continuing airworthiness information’ is intended to include mandatory requirements for modification, replacement of parts or inspection of aircraft and amendment of operating limitations and procedures. Among such information is that issued by Contracting States in the form of Airworthiness Directives.
Note 2.— ICAO Circular 95 — The Continuing Airworthiness of Aircraft in Service — provides the necessary information to assist Contracting States in establishing contact with competent authorities of other Contracting States, for the purpose of maintaining continuing airworthiness of aircraft in service.”
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适航手册 AIRWORTHINESS MANUAL(76)
