On November 24, 2002, the FAA issued emergency AD 2002-24-52, which is applicable to all Boeing Model 747- 400, -400D, and -400F series airplanes. \n\n\tOn November 23, 2002, the FAA issued emergency AD 2002-24-51, applicable to all Boeing Model 737-600, -700, -700C, -800, and -900 series airplanes; Model 747 series airplanes; and Model 757 series airplanes. That AD was prompted by reports indicating that two fuel pumps from different Model 747 series airplanes showed evidence of extreme localized overheating of parts in the priming and vapor pump section of the fuel pump. Such overheating provides an ignition source in the fuel tank during dry running of the pump, which could result in fire/explosion of the fuel tank. \n\n\tAD 2002-24-51 reinstated operating limitations originally imposed by AD 2002-19-52, amendment 39-12900 (67 FR 61253, September 30, 2002). Specifically for Model 747-400, -400D, and -400F series airplanes, AD 2002-24-51 includes a provisionthat prohibits fueling and use of the horizontal stabilizer tank "* * * if a placard prohibiting its use is installed." (That phrase appears in the first paragraph of the required operating limitation.) \n\nActions Since Issuance of Previous Rule \n\n\tSince the issuance of that AD, we have become aware that the reference to placards in the Airplane Flight Manual (AFM) revision for Model 747-400, -400D, and -400F series airplanes should not have been restated because, unlike AD 2002-19-52, AD 2002-24-51 does not require installation of placards. Therefore, if an operator has done the terminating actions specified in AD 2002-19-52 and removed the placards required by that AD, the limitation imposed by AD 2002-24-51 would not prohibit fueling and use of the horizontal stabilizer tank. This would be contrary to the intent of AD 2002-24-51. \n\nExplanation of Requirements of the Rule \n\n\tSince the unsafe condition described is likely to exist or develop on other airplanes of the same typedesign, the FAA issued emergency AD 2002-24-52 to continue to require revising the AFM to require the flightcrew to maintain certain minimum fuel levels in the center fuel tanks, and to prohibit the use of the horizontal stabilizer fuel tank. However, this AD removes the reference to placards that was specified in the operating limitations required by AD 2002-24-51. \n\n\tThe compliance time of this AD remains the same as that specified in AD 2002-24-51 ("within 4 days after receipt" of AD 2002-24-51). In addition, paragraph (b) of this AD states that, if an operator has already complied with AD 2002-24-51, it can comply with this AD simply by deleting the phrase "if a placard prohibiting its use is installed" from the first paragraph of the operating limitation required by AD 2002-24-51. \n\nInterim Action \n\n\tThis is considered to be interim action until final action is identified, at which time the FAA may consider further rulemaking. \n\n\tSince it was found that immediate corrective action was required, notice and opportunity for prior public comment thereon were impracticable and contrary to the public interest, and good cause existed to make the AD effective immediately by individual notices issued on November 24, 2002, to all known U.S. owners and operators of all Boeing Model 747-400, -400D, and -400F series airplanes. These conditions still exist, and the AD is hereby published in the Federal Register as an amendment to section 39.13 of the Federal Aviation Regulations (14 CFR 39.13) to make it effective to all persons. \n\nComments Invited \n\n\tAlthough this action is in the form of a final rule that involves requirements affecting flight safety and, thus, was not preceded by notice and an opportunity for public comment, comments are invited on this rule. Interested persons are invited to comment on this rule by submitting such written data, views, or arguments as they may desire. Communications shall identify the Rules Docket number and be submitted in triplicate to the address specified under the caption ADDRESSES. All communications received on or before the closing date for comments will be considered, and this rule may be amended in light of the comments received. Factual information that supports the commenter's ideas and suggestions is extremely helpful in evaluating the effectiveness of the AD action and determining whether additional rulemaking action would be needed. \n\n\tComments are specifically invited on the overall regulatory, economic, environmental, and energy aspects of the rule that might suggest a need to modify the rule. All comments submitted will be available, both before and after the closing date for comments, in the Rules Docket for examination by interested persons. A report that summarizes each FAA-public contact concerned with the substance of this AD will be filed in the Rules Docket. \n\n\tCommenters wishing the FAA to acknowledge receipt of their comments submitted in response to this rule must submit a self-addressed, stamped postcard on which the following statement is made: "Comments to Docket Number 2002-NM-314-AD." The postcard will be date stamped and returned to the commenter. \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\tThe FAA has determined that this regulation is an emergency regulation that must be issued immediately to correct an unsafe condition in aircraft, and that it is not a "significant regulatory action" under Executive Order 12866. It has been determined further that this action involves an emergency regulation under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979). If it is determined that this emergency regulation otherwise would be significant under DOT Regulatory Policies and Procedures, a final regulatory evaluation will be prepared and placed in the Rules Docket. A copy of it, if filed, 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, Safety. \n\nAdoption of the Amendment \n\n\tAccordingly, 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\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. Section 39.13 is amended by adding the following new airworthiness directive: