An airworthiness directive commonly known as an AD is a mandatory instruction that must be carried out when it is applicable to your aircraft within a given time frame.

The airworthiness directive for example might be repetitive in nature, it might have an option to terminate the requirement by performing a modification or it might be a one-off task. One query you might have to address is the embodiment or accomplishment date for a given AD and this can be very important, especially when considering any instructions for continued airworthiness
(ICA).

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An engine shop visit (SV) is typically when an engine is sent to an overhaul shop for a form of
maintenance which can be scheduled or non-scheduled depending on the situation. In some cases
repairs or works can occur on wing or at a local facility such as borescope blending of blades or top
case repairs when internal access to the engine can be achieved locally.

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The maintenance reserve funds we have considered to date and seen how they can help the lessor protect the asset; we have also reviewed some of the considerations that they will be aimed at covering.

Of course, the fund is to perform maintenance and once the maintenance is performed then the fund can release money for this. Essentially the fund is an insurance policy for the lessor of sorts; but the money ultimately is for maintenance, once it is performed then the fund can be in part drawn down for this based on the accomplished maintenance.

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