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A designer proposes crediting reverse thrust in the certified rejected takeoff distance. This is

  • A.Permitted on dry runways only
  • B.Not permitted, since a reverser may fail to deploy
  • C.Permitted for twin-engine aircraft only
  • D.Permitted if the reversers are electrically actuated

Answer: B

The requirement assumes brakes alone, and fully worn at that, because the reverser is not a guaranteed system. Its real value lies instead in the brake wear and heat it saves on every normal landing the aircraft makes.

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