135.217 En-route - critical engine inoperative

• (a) Each holder of an air operator certificate shall ensure that, for each aeroplane it operates having two or more engines, the aeroplane is capable of continuing flight at a positive slope at or above the relevant minimum safe altitudes, to a point 1000 feet above an aerodrome at which the performance requirements can be met under the following conditions--
  • (1) in the forecasted meteorological conditions expected for the flight; and
  • (2) with the critical engine inoperative; and
  • (3) with the remaining engines operating within the maximum continuous power conditions specified.
• (b) When calculating the en-route limitations in accordance with paragraph (a), the holder of an air operator certificate shall ensure--
  • (1) the aeroplane is not assumed to be flying at an altitude exceeding that at which the rate of climb is not less than 300 feet per minute with all engines operating within the maximum continuous power conditions specified in the aeroplane flight manual; and
  • (2) the assumed en-route gradient with one engine inoperative is the gross-gradient-minus-0.5% gradient.