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FEDERAL REGISTER Published daily, Monday through Friday, (not published on Saturdays, Sundays, or on official holidays), by the Office of the Federal Register, National Archives and Records Administration, Washington, DC 20408, under the Federal Register Act (49 Stat. 500, as amended; 44 U.S.C. Ch. 15) and the regulations of the Administrative Committee of the Federal Register (1 CFR Ch. I). Distribution is made only by the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402.

CFR PARTS AFFECTED IN THIS ISSUE

CONTENTS

Proposed Establishment of Class E Airspace; Leadville, CO

Airworthiness Directives; Pratt & Whitney JT9D Series Turbofan Engines