曝光台 注意防骗
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c) Are the overhaul and inspection periods, work content and rescheduled maintenance activities controlled by reliability methods reflected in the appropriate maintenance manuals?
1.8.14.6 The AID Inspector member of the operator certification team faces a complex and demanding task in reaching a decision as to the adequacy of the applicant's proposed maintenance reliability programme. In the case of applicants proposing to operate large aircraft, the inspector may require assistance from other AID technical experts. In many States where adequate AID resources are not available for this important function, the DCA will need to obtain technical assistance from the CAA of the State of Manufacture or another State possessing substantial experience in such matters.
1.9 Mass and balance programme
1.9.1 General
1.9.1.1 The applicant for the issuance or the renewal of a Certificate of Airworthiness should be required to provide the current mass and balance report for the aircraft.
1.9.1.2 The mass and balance report is normally obtained by weighing. Nevertheless, if the changes in mass and balance have been duly computed and recorded and if the resulting change is minor, the accurate mass may be obtained by calculation from the previous weighing. (A sample of a mass and balance report can be found in Appendix A.)
1.9.1.3 A complete, current, and continuous record of changes in empty mass and empty centre of gravity position should be maintained for each aircraft. This record should contain details of all alterations affecting either the mass or balance of the aircraft.
1.9.2 Periodic determination of mass
1.9.2.1 The aircraft should be re- weighed at periods determine by the CAA.
1.9.2.2 Not withstanding 1.9.2.1 above, it should be the responsibility of the operator of an aircraft to renew the load data sheet if a modification results in a significant change in the empty mass or empty centre of gravity position.
1.9.2.3 Further to the provisions of 1.9.2.2, above if the CAA or the operator is of the opinion that adequate mass control has not been exercised over an aircraft during the modification, the CAA or the operator may require that a new empty mass and empty centre of gravity position should be determined.
1.9.2.4 For a fleet or group of aeroplanes of the same model and configuration, an average gross mass and CG position may be used as the fleet mass and CG position, provided that the gross masses and CG positions of the individual aeroplanes are within a tolerance specified by the CAA. The average gross mass and CG position may be determined on a sampling basis. This method allows longer intervals between the weighing of aircrafts dependent on the fleet size of the operator.
1.9.3 Procedures for determining mass
1.9.3.1 Aircraft mass determination should be supervised by either an airworthiness officer of the CAA or a person duly trained and nominated by an operator or an owner to sign on its behalf. Aircraft should be presented for mass determination in a condition acceptable to the person authorized to supervise the measurements.
1.9.3.2 Two independent determinations should be made and the aircraft longitudinal datum line should be horizontal. The load should be completely removed from the weighing equipment between determinations. The aircraft gross masses as determined by the two measurements should be consistent. If not, the measurements should be repeated until the gross masses, as determined by two consecutive and independent measurements are consistent.
1.9.3.3 Prior to the initial issue of a Certificate of Airworthiness for each aeroplane and helicopters, a list of equipment included in the empty mass should be established. If an operating mass is used, a similar list of removable equipment and disposable load included in the operating mass should also be established. Where a change occurs in the items included in either the empty mass or, if applicable, the operating mass of an aircraft, the appropriate list should be amended by the operator.
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适航手册 AIRWORTHINESS MANUAL(131)
