[Federal Register Volume 59, Number 235 (Thursday, December 8, 1994)] [Unknown Section] [Page 0] From the Federal Register Online via the Government Publishing Office [www.gpo.gov] [FR Doc No: 94-30181] [[Page Unknown]] [Federal Register: December 8, 1994] ----------------------------------------------------------------------- DEPARTMENT OF TRANSPORTATION 14 CFR Part 39 [Docket No. 94-SW-12-AD] Airworthiness Directives; Costruzioni Aeronautiche Giovanni Agusta S.p.A. Model A109A, A109AII, and A109C Series Helicopters AGENCY: Federal Aviation Administration, DOT. ACTION: Notice of proposed rulemaking (NPRM). ----------------------------------------------------------------------- SUMMARY: This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Costruzioni Aeronautiche Giovanni Agusta S.p.A. Model A109A, A109AII, and A109C series helicopters. This proposal would require a modification of the tail boom vertical fin to create inspection openings that permit initial and repetitive visual inspections for cracks in the vertical fin rear spar attachment area. This proposal is prompted by four reports of cracks in the tail boom vertical fin rear spar attachment area. The actions specified by the proposed AD are intended to prevent failure of the vertical fin attachment caused by cracks in the tail boom vertical fin rear spar attachment area, and subsequent loss of control of the helicopter. DATES: Comments must be received by February 6, 1995. ADDRESSES: Submit comments in triplicate to the Federal Aviation Administration (FAA), Office of the Assistant Chief Counsel, 2601 Meacham Blvd., Room 663, Fort Worth, Texas 76137. Comments may be inspected at this location between 9:00 a.m. and 3:00 p.m., Monday through Friday, except Federal holidays. The service information referenced in the proposed rule may be obtained from Agusta, Direzione Supporto Prodotto E Servizi, 21019 Somma Lombardo (VA), Via per Tornavento, 15. This information may be examined at the FAA, Office of the Assistant Chief Counsel, 2601 Meacham Blvd., Room 663, Fort Worth, Texas. FOR FURTHER INFORMATION CONTACT: Mr. James Major, Aerospace Engineer, Rotorcraft Standards Staff, FAA, Rotorcraft Directorate, 2601 Meacham Blvd., Fort Worth, Texas, 76137, telephone (817) 222-5117, fax (817) 222-5961. 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 summarizing 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. 94-SW-12-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, Office of the Assistant Chief Counsel, Attention: Rules Docket No. 94-SW-12-AD, 2601 Meacham Blvd., Room 663, Fort Worth, Texas, 76137. Discussion The Registro Aeronautico Italiano (RAI), which is the airworthiness authority for Italy, recently notified the FAA that an unsafe condition may exist on Costruzioni Aeronautiche Giovanni Agusta S.p.A. Model A109A, A109AII, and A109C series helicopters. The RAI advises that there have been four reports of cracks in the tail boom vertical fin rear spar attachment area, which is currently not accessible for inspection. Costruzioni Aeronautiche Giovanni Agusta S.p.A. has issued Agusta Bollettino Tecnico No. 109-96, dated March 30, 1994 (service bulletin), which specifies a modification of the tail boom vertical fin on certain helicopters to create inspection openings that permit visual inspection for cracks in the vertical fin rear spar attachment area, and specifies initial and repetitive visual inspections for cracks in the vertical fin rear spar attachment area. The RAI classified this service bulletin as mandatory and issued RAI AD 94-098, dated April 22, 1994, in order to assure the continued airworthiness of these helicopters in Italy. These helicopter models are manufactured in Italy and are type certificated for operation in the United States under the provisions of Sec. 21.29 of the Federal Aviation Regulations (14 CFR 21.29) and the applicable bilateral airworthiness agreement. Pursuant to this bilateral airworthiness agreement, the RAI has kept the FAA informed of the situation described above. The FAA has examined the findings of the RAI, reviewed all available information, and determined that AD action is necessary for products of this type design that are certificated for operation in the United States. Since an unsafe condition has been identified that is likely to exist or develop on other Costruzioni Aeronautiche Giovanni Agusta S.p.A. Model A109A, A109AII, and A109C series helicopters of the same type design registered in the United States, the proposed AD would require, within the next 100 hours time-in-service (TIS), an initial visual inspection for cracks in the vertical fin rear spar attachment area and modification of the tail boom vertical fin to create inspection openings that permit recurring visual inspections. Thereafter, it would require repetitive visual inspections for cracks in the vertical fin rear spar attachment area at intervals not to exceed 300 hours TIS. This proposal is prompted by four reports of cracks in the tail boom vertical fin rear spar attachment area. The actions would be required to be accomplished in accordance with the service bulletin described previously. The FAA estimates that 73 helicopters of U.S. registry would be affected by this proposed AD, 14 helicopters with tail boom, part number (P/N) 109-0370-01 installed, and 59 helicopters with tail boom, P/N 109-0370-17 installed, that it would take (1) approximately 4 work hours per helicopter to initially modify and inspect those helicopters with tail boom, part number (P/N) 109-0370-01; (2) approximately 6 work hours per helicopter to initially modify and inspect those helicopters with tail boom, P/N 109-0370-17; and, (3) approximately 1 work hour per helicopter to conduct the repetitive inspection regardless of which tail boom is installed, and that the average labor rate is $60 per work hour. Required parts would cost approximately $140 for helicopters with tail boom, P/N 109-0370-01 and $280 for helicopters with tail boom, P/N 109-0370-17. Based on these figures, the total cost impact of the proposed AD on U.S. operators during the first year is estimated to be $5,320 for helicopters with tail boom, P/N 109-0370-01, and $37,760 for helicopters with tail boom, P/N 109-0370-17, and for each subsequent year, regardless of the type of tail boom installed, $180, assuming that three helicopters are subject to the repetitive inspection each year. 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 proposed regulation (1) is not a ``significant regulatory action'' under Executive Order 12866; (2) is not a ``significant rule'' under the 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 is contained 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. App. 1354(a), 1421 and 1423; 49 U.S.C. 106(g); and 14 CFR 11.89. Sec. 39.13 [Amended] 2. Section 39.13 is amended by adding a new airworthiness directive to read as follows: Costruzioni Aeronautiche Giovanni Agusta S.P.A.: Docket No. 94-SW- 12-AD. Applicability: Model A109A, A109AII, and A109C series helicopters, serial number (S/N) 7670 and lower, excluding S/N 7630, 7633, 7645, 7651, 7654, 7663, 7665, 7666, 7667, 7668, and 7669, certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent failure of the vertical fin attachment caused by cracks in the tail boom vertical fin rear spar attachment area, and subsequent loss of control of the helicopter, accomplish the following: (a) Within the next 100 hours time-in-service (TIS), modify the tail boom vertical fin and perform a visual inspection for cracks in the vertical fin rear spar attachment area in accordance with Part I of the Accomplishment Instructions of Agusta Bollettino Tecnico No. 109-96, dated March 30, 1994. (1) For helicopters with tail boom, part number (P/N) 109-0370- 01, perform the modification using modification kit, P/N 109-0822- 38-101, in accordance with steps 5 through 8 of Part I of the Accomplishment Instructions of Agusta Bollettino Tecnico No. 109-96, dated March 30, 1994. (2) For helicopters with tail boom, P/N 109-0370-17, perform the modification using modification kit, P/N 109-0822-38-103, in accordance with steps 9 through 12 of Part I of the Accomplishment Instructions of Agusta Bollettino Tecnico No. 109-96, dated March 30, 1994. (b) Thereafter, at intervals not to exceed 300 hours TIS from the last inspection, remove the vertical fin leading edge fairing assembly and visually inspect the vertical fin rear spar attachment area for cracks in accordance with Part II of the Accomplishment Instructions of Agusta Bollettino Tecnico No. 109-96, dated March 30, 1994. (c) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used when approved by the Manager, Rotorcraft Standards Staff, FAA, Rotorcraft Directorate. Operators shall submit their requests through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Rotorcraft Standards Staff. Note: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Rotorcraft Standards Staff. (d) 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 helicopter to a location where the requirements of this AD can be accomplished. Issued in Fort Worth, Texas, on December 2, 1994. Eric Bries, Acting Manager, Rotorcraft Directorate, Aircraft Certification Service. [FR Doc. 94-30181 Filed 12-7-94; 8:45 am] BILLING CODE 4910-13-P