Editorial Note: For a complete list of citations to airworthiness directives published in the FEDERAL REGISTER, consult the following publications: For airworthiness directives published in the FEDERAL REGISTER since 2001, see the entries for 14 CFR 39.13 in the List of CFR Sections Affected, which appears in the "Finding Aids" section of the printed volume and on GPO Access. For citations to prior amendments, see the entries for 14 CFR 39.13 in the separate publications "List of CFR Sections Affected, 1973-1985," "List of CFR Sections Affected, 1964-1972," and "List of CFR Sections Affected, 1986-2000," and the entries for 14 CFR 507.10 in the "List of Sections Affected, 1949-1963." See also the annual editions of the Federal Register Index for subject matter references and citations to FAA airworthiness directives. For a list of aircraft service documents approved by the Director of the Federal Register for incorporation by reference in this part under 5 U.S.C. 552(a) and 1 CFR 51, see Material Approved for Incorporation by Reference, which appears in the "Finding Aids" section of the printed volume and on GPO Access.