(a)(1) Warranties imposed by Sec. 94.1107 for Category 1 or Category 2 engines shall apply for a period of operating hours equal to at least 50 percent of the useful life in operating hours or a period of years equal to at least 50 percent of the useful life in years, whichever comes first.
(1) Warranties imposed by Sec. 94.1107 for Category 1 or Category 2 engines shall apply for a period of operating hours equal to at least 50 percent of the useful life in operating hours or a period of years equal to at least 50 percent of the useful life in years, whichever comes first.
(2) Warranties imposed by Sec. 94.1107 for Category 3 engines shall apply for a period of operating hours equal to at least the full useful life in operating hours or a period of years equal to at least the full useful life in years, whichever comes first.
(b) Warranties imposed by Sec. 94.1107 shall apply for a period not less than any mechanical warranties provided by the manufacturer to the owner. [64 FR 73331, Dec. 29, 1999, as amended at 68 FR 9784, Feb. 28, 2003]