AD 98-03-09

On December 9, 1997, the FAA issued AD 97-26-04, amendment 39-10247 (62 FR 65600, December 15, 1997), applicable to all Boeing Model 737-100, -200, -300, -400, and -500 series airplanes. That AD requires a one-time inspection to determine if certain ailerons are installed on the airplane. That AD also requires removing any defective aileron, replacing it with a new or serviceable aileron, and submitting an inspection report to the FAA, if necessary. That action was prompted by reports of failure of the aileron due to an inappropriate repair procedure. The actions specified in that AD are intended to detect and correct defective ailerons, which could result in in-flight separation of an aileron from the airplane and consequent reduced controllability of the airplane.

Actions Since Issuance of Previous Rule

Since the issuance of that AD, the FAA has received additional information that identifies correlating part numbers for the aileron serial numbers cited in AD 97-26-04. Specification of those correlating part numbers with the aileron serial numbers will enable operators to readily identify certain defective ailerons. Such defective ailerons could result in in-flight separation of an aileron from the airplane and consequent reduced controllability of the airplane.

Explanation of Requirements of Rule

Since an unsafe condition has been identified that is likely to exist or develop on other airplanes of the same type design, this AD supersedes AD 97-26-04 to continue to require a one- time visual inspection to determine if certain ailerons are installed on the airplane. This AD also continues to require removing any defective aileron, replacing it with a new or serviceable aileron, and submitting an inspection report to the FAA, if necessary.

Determination of Rule's Effective Date

Since a situation exists that requires the immediate adoption of this regulation, it is found that notice and opportunity for prior public comment hereon are impracticable, and that good cause exists for making this amendment effective in less than 30 days.

Comments Invited

Although 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 wouldbe needed.

Comments 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.

Commenters 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 98-NM-09-AD." The postcard will be date stamped and returned to the commenter.

Regulatory Impact

The 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 responsibilitiesamong 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.

The 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."

List of Subjects in 14 CFR Part 39Air transportation, Aircraft, Aviation safety, Safety.

Adoption of the Amendment

Accordingly, 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:

PART 39 - AIRWORTHINESS DIRECTIVES

1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 (Amended) 2. Section 39.13 is amended by removing amendment 39-10247 (62 FR 65600, December 15, 1997), and by adding a new airworthiness directive (AD), amendment 39-10301, to read as follows: