Text in force at 27-51: from 27-21, effective 6 Dec 1984.
[Primary flight controls are those used by the pilot for immediate control of pitch, roll, yaw, and vertical motion of the rotorcraft.]
49 FR 44434 · Source
Dek Regulatory System
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Text in force at 27-51: from 27-21, effective 6 Dec 1984.
49 FR 44434 · Source
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