AD 98-2416

[Federal Register Volume 63, Number 21 (Monday, February 2, 1998)] [Proposed Rules] [Pages 5324-5325] From the Federal Register Online via the Government Publishing Office [www.gpo.gov] [FR Doc No: 98-2416]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 97-CE-140-AD] RIN 2120-AA64

Airworthiness Directives; AERMACCI S.p.A. Models S208 and S208A Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: This document proposes to adopt a new airworthiness directive (AD) that would apply to all AERMACCI S.p.A. Models S.208 and S.208A airplanes. The proposed action would require inspecting the landing gear rod springs to assure they are made with a wire diameter of 4.5 millimeters (mm), and replacing any that have a wire diameter of 4.0 mm. The proposed AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Italy. The actions specified by the proposed AD are intended to prevent failure of the landing gear caused by an insufficient wire diameter of the rod springs, which could result in loss of control of the airplane during landing operations.

DATES: Comments must be received on or before March 9, 1998.

ADDRESSES: Submit comments in triplicate to the Federal Aviation Administration (FAA), Central Region, Office of the Regional Counsel, Attention: Rules Docket No. 97-CE-140-AD, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106. Comments may be inspected at this location between 8 a.m. and 4 p.m., Monday through Friday, holidays excepted. Service information that applies to the proposed AD may be obtained from SIAI Marchetti S.p.A., Product Support Department, Via Indipendenza 2, 21018 Sesto Calende (VA), Italy; telephone: +39-331- 929117; facsimile: +39-331-922525. This information also may be examined at the Rules Docket at the address above.

FOR FURTHER INFORMATION CONTACT: Mr. David O. Keenan, Project Officer, FAA, Small Airplane Directorate, Aircraft Certification Service, 1201 Walnut, suite 900, Kansas City, Missouri 64106; telephone: (816) 426- 6934; facsimile: (816) 426-2169.

SUPPLEMENTARY INFORMATION:

Comments Invited

Interested persons are invited to participate in the making of the proposed rule by submitting such written data, views, or arguments as they may desire. Communications should identify the Rules Docket number and be submitted in triplicate to the address specified above. All communications received on or before the closing date for comments, specified above, will be considered before taking action on the proposed rule. The proposals contained in this notice may be changed in light of the comments received. Comments are specifically invited on the overall regulatory, economic, environmental, and energy aspects of the proposed 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 proposal will be filed in the Rules Docket. Commenters wishing the FAA to acknowledge receipt of their comments submitted in response to this notice must submit a self-addressed, stamped postcard on which the following statement is made: ``Comments to Docket No. 97-CE-140-AD.'' The postcard will be date stamped and returned to the commenter.

Availability of NPRMs

Any person may obtain a copy of this NPRM by submitting a request to the FAA, Central Region, Office of the Regional Counsel, Attention: Rules Docket No. 97-CE-140-AD, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106.

Discussion

The Registro Aeronautico Italiano (R.A.I.), which is the airworthiness authority for Italy, notified the FAA that an unsafe condition may exist on AERMACCI S.p.A. Models S.208 and S.208A airplanes. The R.A.I. reports that the above-referenced airplanes could have landing gear rod springs that have a wire diameter of 4.0 millimeters (mm) instead of 4.5 mm. This condition, if not corrected in a timely manner, could result in failure of the landing gear with possible loss of control of the airplane during landing operations.

Relevant Service Information

SIAI Marchetti S.p.A. has issued Service Bulletin No. 205B59, dated July 29, 1995, which includes procedures for inspecting the landing gear rod springs for the correct wire diameter on the above-referenced airplanes, and specifies replacing any landing gear rod springs with an incorrect wire diameter. The R.A.I. classified this service bulletin as mandatory and issued Italian AD 97-143 dated May 20, 1997, in order to assure the continued airworthiness of these airplanes in Italy.

The FAA's Determination

These airplane models are manufactured in Italy and are type certificated for operation in the United States under the provisions of section 21.29 of the Federal Aviation Regulations (14 CFR 21.29) and the applicable bilateral airworthiness agreement. Pursuant to this bilateral airworthiness agreement, the R.A.I. has kept the FAA informed of the situation described above. The FAA has examined the findings of the R.A.I.; reviewed all available information, including the service information referenced above; and determined that AD action is necessary for products of this type design that are certificated for operation in the United States.

Explanation of the Provisions of the Proposed AD

Since an unsafe condition has been identified that is likely to exist or develop in other AERMACCI S.p.A. Models S.208 and S.208A airplanes of the same type design registered in the United States, the FAA is proposing AD action. The proposed AD would require inspecting the landing gear rod springs to assure they are made with a wire diameter of 4.5 millimeters (mm), and replacing any that have a wire diameter of 4.0 mm. Accomplishment of the proposed inspection would be in accordance with the previously referenced service information. Accomplishment of the proposed replacement, if applicable, would be in accordance with the maintenance manual.

Cost Impact

The FAA estimates that 6 airplanes in the U.S. registry would be affected by the proposed AD, that it would take approximately 9 workhours per airplane to accomplish the proposed actions, and that the average labor rate is approximately $60 an hour. Parts cost

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approximately $15 per airplane. Based on these figures, the total cost impact of the proposed AD on U.S. operators is estimated to be $3,330, or $555 per airplane. This figure is based on the presumption that all of the affected airplanes would have landing gear rod springs with an incorrect diameter, and would require replacement of these rod springs.

Regulatory Impact

The regulations proposed herein would 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 proposal would not have sufficient federalism implications to warrant the preparation of a Federalism Assessment. For 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) if promulgated, 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 copy of the draft regulatory evaluation prepared for this action has been placed in the Rules Docket. A copy of it may be obtained by contacting the Rules Docket at the location provided under the caption ADDRESSES.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Safety.

The Proposed Amendment

Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration proposes to amend 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.

Sec. 39.13 [Amended]

2. Section 39.13 is amended by adding a new airworthiness directive (AD) to read as follows:

AERMACCI S.P.A.: Docket No. 97-CE-140-AD.

Applicability: Models S.208 and S.208A airplanes, all serial numbers, certificated in any category.

Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (d) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.

Compliance: Required as indicated in the body of this AD, unless already accomplished. To prevent failure of the landing gear caused by an insufficient wire diameter of the rod springs, which could result in loss of control of the airplane during landing operations, accomplish the following: (a) Within the next 100 hours time-in-service (TIS) after the effective date of this AD, inspect the landing gear rod springs to assure they are made with a wire diameter of 4.5 millimeters (mm). Accomplish this inspection in accordance with SIAI Marchetti S.p.A. Service Bulletin No. 205B59, dated July 29, 1995. (b) If any landing gear rod springs are found to have a wire diameter of 4.0 mm, prior to further flight after the inspection required by paragraph (a) of this AD, replace these rod springs with rod springs that have a wire diameter of 4.5 mm. Accomplish this replacement in accordance with the applicable maintenance manual. (c) Special flight permits may be issued in accordance with Secs. 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished. (d) An alternative method of compliance or adjustment of the compliance times that provides an equivalent level of safety may be approved by the Manager, Small Airplane Directorate, 1201 Walnut, suite 900, Kansas City, Missouri 64106. The request shall be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Small Airplane Directorate.

Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Small Airplane Directorate.

(e) Questions or technical information related to SIAI Marchetti S.r.1 Service Bulletin No. 205B59, dated July 29, 1995, should be directed to SIAI Marchetti S.p.A., Product Support Department, Via Indipendenza 2, 21018 Sesto Calende (VA), Italy; telephone: +39-331- 929117; facsimile: +39-331-922525. This service information may be examined at the FAA, Central Region, Office of the Regional Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106.

Note 3: The subject of this AD is addressed in Italian AD 97- 143, dated May 20, 1997.

Issued in Kansas City, Missouri, on January 26, 1998. Michael Gallagher, Manager, Small Airplane Directorate, Aircraft Certification Service. [FR Doc. 98-2416 Filed 1-30-98; 8:45 am] BILLING CODE 4910-13-U