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§ 27.71
Autorotation performance.
For single-engine helicopters and multiengine helicopters that do not meet the Category A engine isolation requirements of Part 29 of this chapter, the minimum rate of descent airspeed and the best angle-of-glide airspeed must be determined in autorotation at—
(a) Maximum weight; and
(b) Rotor speed(s) selected by the applicant.
[Amdt. 27-21, 49 FR 44433, Nov. 6, 1984]