Civil aeronautics manuals: v. 2, supp. 25, Revisions to CAM 3 [Airplane airworthiness, normal, utility, and acrobatic categories], Oct. 1956, CAM 4b [Airplane airworthiness, transport categories], Jan. 1958, and CAM 6 [Rotorcraft airworthiness, normal category], Nov. 1956; Jan. 15, 1959.

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