A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) by superseding AD 99-18-07, amendment 39-11273 (64 FR 47372, August 31, 1999), which is applicable to certain Boeing Model 747-400 series airplanes, was published in the Federal Register on June 23, 2004 (69 FR 34969). That action proposed to continue to require installation of strap assemblies on the ceiling panels and rails that support the video monitors. For certain airplanes, that action also proposed to require replacement of certain plate assemblies within the ceiling panel strap assemblies with new, improved plate assemblies. That action also proposed to revise the applicability by adding airplanes. \n\nComments \n\n\tInterested persons have been afforded an opportunity to participate in the making of this amendment. No comments were submitted in response to the proposal or the FAA's determination of the cost to the public. \n\nChange to This Final Rule \n\n\tThe Summary section of the proposed AD inadvertantly stated that the existing AD that is being superseded, AD 99-18-07, amendment 39- 11273 (64 FR 47372, August 31, 1999), is applicable to certain Boeing Model 747-400 and 747-400D series airplanes. The existing AD is applicable only to certain Boeing Model 747-400 series airplanes. The Summary section of this final rule has been changed to correctly state that the existing AD is applicabe to certain Boeing Model 747-400 series airplanes. \n\nConclusion \n\n\tWe have carefully reviewed the available data and determined that air safety and the public interest require adopting the AD with the change described previously. We have determined that this change will neither increase the economic burden on any operator nor increase the scope of the AD. \n\nCost Impact \n\n\tThere are approximately 346 airplanes of the affected design in the worldwide fleet. The FAA estimates that 43 airplanes of U.S. registry will be affected by this AD. \n\n\tThe actions thatare currently required by AD 99-18-07, and retained in this AD, take approximately 9 work hours per ceiling panel, and between 18 and 126 work hours per airplane to accomplish, at an average labor rate of $65 per work hour. Required parts cost between $1,366 and $9,575 per airplane. Based on these figures, the cost impact of the previously required actions on U.S. operators is estimated to be between $2,536 and $17,765 per airplane. \n\n\tThe installation of new plates that is required by this new AD will take approximately 7 work hours per ceiling panel, and between 18 and 126 work hours per airplane, at an average labor rate of $65 per work hour. Required parts will cost between $1,700 and $12,200 per airplane. Based on these figures, the cost impact of the new requirements of this AD on U.S. operators is estimated to be between $2,870 and $20,390 per airplane. \n\n\tThe cost impact figures discussed above are based on assumptions that no operator has yet accomplished any of the requirements of this AD action, and that no operator would accomplish those actions in the future if this AD were not adopted. The cost impact figures discussed in AD rulemaking actions represent only the time necessary to perform the specific actions actually required by the AD. These figures typically do not include incidental costs, such as the time required to gain access and close up, planning time, or time necessitated by other administrative actions. \n\nRegulatory Impact \n\n\tThe regulations adopted herein will not have a substantial direct effect on the States, on the relationship between the national Government and the States, or on the distribution of power and responsibilities among the various levels of government. Therefore, it is determined that this final rule does not have federalism implications under Executive Order 13132. \n\n\tFor the reasons discussed above, I certify that this action (1) is not a "significant regulatory action" under Executive Order 12866; (2) is not a"significant rule" under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and (3) will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. A final evaluation has been prepared for this action and it is contained in the Rules Docket. A copy of it may be obtained from the Rules Docket at the location provided under the caption ADDRESSES. \n\nList of Subjects in 14 CFR Part 39 \n\n\tAir transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. \n\nAdoption of the Amendment \n\nAccordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows: \n\nPART 39--AIRWORTHINESS DIRECTIVES \n\n1. The authority citation for part 39 continues to read as follows: \n\n\tAuthority: 49 U.S.C. 106(g), 40113, 44701. \n\n§ 39.13 (Amended) \n\n2. Section 39.13 is amended by removing amendment 39-11273 (64 FR 47372, August 31, 1999), and by adding a new airworthiness directive (AD), amendment 39-13843, to read as follows: