21-63-3. Factors in determining useful safe life.
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/sd/title-21/chapter-21-63/21-63-3A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
Factors to be considered in determining whether an aviation product's useful safe life has expired include:
(1)The amount of wear and tear to which the aviation product had been subject;
(2)The effect of deterioration from natural causes and from climate and other conditions under which the aviation product was used or stored;
(3)The normal practices of the user, similar users, and the aviation product seller with respect to the circumstances, frequency, and purposes of the product's use, and with respect to repairs, renewals, and replacements;
(4)Any representations, instructions, or warnings made by the aviation product seller concerning proper maintenance, storage, and use of the product or the expected useful safe life of the product; and
(5)Any modification or alteration of the aviation product by a user or third party.