4.2.9.1 Equipment, tools, material, and airworthiness and maintenance data should be available for completion of the scope of activities included in the approval granted by the airworthiness authority. For maintenance organizations that are not also aircraft operators, it is not uncommon to expect some specialized equipment, tools and data in respect of a particular variant of an aircraft type to be provided by the operator. An airworthiness authority which accepts an arrangement of this nature should ensure that the activity is controlled by proper contractual arrangement between the maintenance organization and the operator. The approved maintenance organization should show that all tools and equipment as specified in the approved data can be made available when needed.
4.2.9.2 Much of the tooling and equipment associated with aircraft maintenance is subject to periodic calibration. The calibration procedures should be acceptable to the airworthiness authority and the actual standards themselves traceable to international standards acceptable to the State concerned.
4.2.9.3 All tools and equipment that are required to be controlled in terms of servicing or calibration should be clearly identified and listed in a control register including any personal tools and equipment that the organization agrees can be used. Where the manufacturer specifies a particular tool and equipment, then that tool or equipment should be used, unless otherwise agreed by the CAA in a particular case via a procedure specified in the approved maintenance organization’s procedures manual.
4.2.9.4 The control of these tools and equipment requires that the approved maintenance organization has a procedure to inspect/maintain and, where appropriate, calibrate such items on a regular basis and indicate to users that the item is within any inspection or service calibration time-limit.
4.2.9.5 A clear system of labeling all tooling, equipment and test equipment is therefore necessary giving information on when the next inspection or service or calibration is due and if the item is unserviceable for any other reason where it may not be obvious. A register should be maintained for all precision tools and equipment together with a record of calibrations and standards used.
4.2.9.6 Inspection, maintenance and calibration on a regular basis should be in accordance with the equipment manufacturer’s instructions except otherwise as accepted by the CAA.
4.2.10 Contract and subcontract
It is accepted practice for operators to contract their maintenance requirements to approved maintenance organizations. In some States, it is accepted practice to permit approved maintenance organizations to subcontract work to organizations which are either not approved by the airworthiness authority or not approved for the activities under consideration. In the acceptance of this practice, consideration should be given to the following points (see also more details in the 4.2.11.3 below):
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