The FAA proposed to amend 14 CFR part 39 with an AD for certain Boeing Model 747-100 and -200B series airplanes. That action, published in the Federal Register on August 6, 2004 (69 FR 47814), proposed to require installing bonding clips and bonding jumpers from the housing of each fuel pump to airplane structure outside the fuel tanks. \n\nComments \n\n\tWe provided the public the opportunity to participate in the development of this AD. We have considered the comments submitted on the proposed AD. \n\nRequest To Revise Bonding Resistance Values \n\n\tThe commenters state that there is a discrepancy in Boeing Alert Service Bulletin 747-28A2033, Revision 1, dated December 18, 2003. The discrepancy is the different maximum allowable resistance values for the boost pumps and the override jettison pumps. The resistance value for the boost pumps is 0.0004 ohm. The resistance value for the jettison pumps is 0.0002 ohm. One of the commenters notes that the same bonding jumper is used for each type of pump. We infer that the commenter requests that either of the resistance values be changed so the values are the same for the boost and override jettison pumps. The other commenter requests revising the proposed AD, or contacting the manufacturer so the service bulletin can be revised to correct the discrepancy. \n\n\tThe FAA does not agree that there is an error in the resistance values stated in Boeing Alert Service Bulletin 747-28A2033, Revision 1. The resistance values stated in the service bulletin are correct, and are based upon possible fault current magnitudes, which are different for the two pump types. This AD has not been changed regarding this issue. \n\nConclusion \n\n\tWe have carefully reviewed the available data, including the comments that have been submitted, and determined that air safety and the public interest require adopting the AD as proposed. \n\nCosts of Compliance \n\n\tThis AD affects about 158 airplanes worldwide. The following table provides the estimated costs for U.S. operators to comply with this AD. \n\nEstimated Costs\n\n\nAction\nWork hours\nAverage labor rate per hour\nParts\nCost per airplane\nNumber of U.S.-registered airplanes\nFleet cost\nInstallation of Bonding Clips/Jumpers\n8\n$65\n$0\n$520\n23\n$11,960\n \n\nAuthority for This Rulemaking \n\n\tThe FAA's authority to issue rules regarding aviation safety is found in Title 49 of the United States Code. Subtitle I, section 106 describes the authority of the FAA Administrator. Subtitle VII, Aviation Programs, describes in more detail the scope of the agency's authority. \n\n\tThis rulemaking is promulgated under the authority described in subtitle VII, part A, subpart III, section 44701, "General requirements." Under that section, the FAA is charged with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this AD. \n\nRegulatory Findings \n\n\tWe have determined that this AD will not have federalism implications under Executive Order 13132. This AD 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. \n\n\tFor the reasons discussed above, I certify that this AD: \n\n\t(1) Is not a "significant regulatory action" under Executive Order 12866; \n\n\t(2) Is not a "significant rule" under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and \n\n\t(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. \n\n\tWe prepared a regulatory evaluation of the estimatedcosts to comply with this AD. See the ADDRESSES section for a location to examine the regulatory evaluation. \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\n\tAccordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: \n\nPART 39-AIRWORTHINESS DIRECTIVES \n\n\t1. 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\n\t2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD):