§ 89.104-96 - Useful life, recall, and warranty periods.

(a) The useful life is a period of 8,000 hours of operation or ten years of use, whichever first occurs.

(b) Engines are subject to recall testing for a period of 6,000 hours of operation or seven years of use, whichever first occurs. However, in a recall, engines in the subject class or category must be recalled regardless of actual years or hours of operation.

(c) Warranties imposed by the Clean Air Act are for 3,000 hours of operation or five years of use, whichever first occurs.

(d) Manufacturers may apply to the Administrator for approval for a shorter useful life period for engines that are subject to severe service in seasonal equipment, or are designed specifically for lower useful life hours to match equipment life. Such an application must be made prior to certification.