On March 5, 1996, the FAA issued AD 96-06-01, amendment 39-9537 (61 FR 9607, March 11, 1996), which is applicable to Boeing Model 757 series airplanes equipped with certain electro hydraulic servo valves (EHSV) installed in certain spoiler actuators. That AD requires a one-time inspection of the EHSV on the spoiler actuator to determine if a suspect valve is incorrectly installed; if so, the EHSV must be replaced. That action was prompted by reports that a bias spring in the EHSV of certain spoiler actuators was found to be incorrectly installed. \n\n\tIf the jet pipe in the first stage of the EHSV is plugged, or if the differential pressure between the extend and retract ports pressurized by the jet pipe is inadequate, an incorrectly installed bias spring on the second stage spool would cause the spoiler to be driven into the "deploy" position. Such inadvertent spoiler deployment would result in the airplane experiencing a rolling moment. If the airplaneis already banked or is at a low altitude, or if the crew does not respond rapidly enough to control the uncommanded roll, a significant control upset of the airplane could result. The actions required by AD 96-06-01 are intended to prevent the occurrence of such a control upset. \n\nNew Data Since Issuance of AD 96-06-01 \n\n\tSince the issuance of that AD, the manufacturer has provided the FAA with data indicating that additional suspect EHSV's may be installed on the affected airplanes. These suspect EHSV's have serial numbers of 595, 563, and 909. If any of these EHSV's are installed on an airplane, there is the potential for the occurrence of the same unsafe condition that was addressed by AD 96-06-01. \n\nExplanation of New AD \n\n\tSince an unsafe condition has been identified that is likely to exist or develop on other airplanes of this same type design, this AD supersedes AD 96-06-01 to require a one-time inspection of the spoiler actuator to determine if a suspect EHSV is incorrectly installed, and replacement of the EHSV, if necessary. This AD requires the inspection for and removal of three additional suspect EHSV's. \n\n\tAdditionally, action is taken throughout this AD to specify the correct names of the manufacturers of the spoiler actuator and the EHSV. The subject spoiler actuators are manufactured by Moog; the subject EHSV's are manufactured by Abex. \n\n\tTable 1 of this AD has been corrected to indicate that the order numbers are "Abex" order numbers, rather than "Boeing" order numbers. \n\n\tDue to a typographical error, EHSV serial number "559" was incorrectly listed in Table 1 of AD 96-06-01 as serial number "569." This AD corrects that error.\n\n Cost Impact \n\n\tAccording to the records of the EHSV manufacturer, all of the affected EHSV's were shipped to be installed on Model 757 series airplanes that currently are operated by non-U.S. operators under foreign registry. None of the Model 757 series airplanes affected by this action are onthe U.S. Register; therefore, they are not directly affected by this AD action. However, the FAA considers that this rule is necessary to ensure that the unsafe condition is addressed in the event that: \n\n\t1. any of the subject airplanes are imported and placed on the U.S. Register in the future; or \n\t2. any one of the suspect EHSV's is installed on a U.S.-registered airplane in the future. \n\n\tShould an affected airplane be placed on the U.S. Register in the future, it would require approximately 1 work hour to accomplish the required actions, at an average labor charge of $60 per work hour. Based on these figures, the cost impact of this AD would be $60 per airplane.\n\n Conclusion \n\n\tSince this AD action does not affect any airplane that is currently on the U.S. register, it has no adverse economic impact and imposes no additional burden on any person. Therefore, notice and public procedures hereon are unnecessary and the amendment may be made effective in less than 30 days after publication in the Federal Register. \n\nComments Invited \n\n\tAlthough this action is in the form of a final rule and was not preceded by notice and 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 96-NM-75-AD." The postcard will be date stamped and returned to the commenter. \n\n\tThe regulations adopted herein will not have substantial direct effects 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, in accordance with Executive Order 12612, it is determined that this final rule does not have sufficient federalism implications to warrant the preparation of a Federalism Assessment. \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, 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\n PART 39 - AIRWORTHINESS DIRECTIVES \n\n\t1. The authority citation for part 39 continues to read as follows: Authority: 49 USC 106(g), 40113, 44701. § 39.13 - (Amended) \n\n\t2 Section 39.13 is amended by removing amendment 39-9537 (61 FR 9607, March 11, 1996), and by adding a new airworthiness directive (AD), amendment 39-9581, to read as follows: