52423 Rules and Regulations Federal Register Vol. 64, No. 188 Wednesday, September 29, 1999 This section of the FEDERAL REGISTER Federal Register as of November 29, As this revision is merely a contains regulatory documents having general 1999. clarification, there is no additional applicability and legal effect, most of which ADDRESSES: The service information economic impact on operators. are keyed to and codified in the Code of referenced in this AD may be obtained Federal Regulations, which is published under The regulations adopted herein will 50 titles pursuant to 44 U.S.C. 1510. from AlliedSignal Aerospace, Attn: Data not have substantial direct effects on the Distribution, M/S 64±3/2101±201, PO States, on the relationship between the The Code of Federal Regulations is sold by Box 29003, Phoenix, AZ 85038±9003; national government and the States, or the Superintendent of Documents. Prices of telephone (602) 365±2493, fax (602) on the distribution of power and new books are listed in the first FEDERAL 365±5577. This information may be REGISTER issue of each week. examined at the Federal Aviation responsibilities among the various Administration (FAA), New England levels of government. Therefore, in Region, Office of the Regional Counsel, accordance with Executive Order 12612, DEPARTMENT OF TRANSPORTATION 12 New England Executive Park, it is determined that this final rule does Burlington, MA; or at the Office of the not have sufficient federalism Federal Aviation Administration Federal Register, 800 North Capitol implications to warrant the preparation of a Federalism Assessment. 14 CFR Part 39 Street, NW, 7th Floor, suite 700, Washington, DC. For the reasons discussed above, I [Docket No. 97±ANE±51±AD; Amendment FOR FURTHER INFORMATION CONTACT: certify that this action (1) is not a 39±11332; AD 98±17±01 R1] Joseph Costa, Aerospace Engineer, Los ``significant regulatory action'' under RIN 2120±AA64 Angeles Aircraft Certification Office, Executive Order 12866; (2) is not a FAA, Transport Airplane Directorate, ``significant rule'' under DOT Airworthiness Directives; AlliedSignal 3960 Paramount Blvd., Lakewood, CA Regulatory Policies and Procedures (44 Inc. TFE731 Series Turbofan Engines 90712; telephone (562) 627±5246, fax FR 11034, February 26, 1979); and (3) (562) 627±5210. will not have a significant economic AGENCY: Federal Aviation SUPPLEMENTARY INFORMATION: A Administration, DOT. impact, positive or negative, on a proposal to amend part 39 of the Federal substantial number of small entities ACTION: Final rule. Aviation Regulations (14 CFR part 39) under the criteria of the Regulatory by revising Airworthiness Directive Flexibility Act. A final evaluation has SUMMARY: This amendment revises an (AD) 98±17±01, Amendment 39±10703 been prepared for this action and it is existing airworthiness directive (AD), (63 FR 42691, August 11, 1998), which contained in the Rules Docket. A copy applicable to AlliedSignal Inc. TFE731 is applicable to AlliedSignal Inc. series turbofan engines, that currently TFE731 series turbofan engines, was of it may be obtained from the Rules requires installation of an improved published in the Federal Register on Docket at the location provided under flexible (flex) fuel tube. This April 19, 1999 (64 FR 19096). The the caption ADDRESSES. amendment clarifies that installation of action proposed to clarify that List of Subjects in 14 CFR Part 39 the improved flex fuel tube and that the installation of the improved flexible use of a clamp on the original rigid fuel (flex) fuel tube and that the use of a Air transportation, Aircraft, Aviation tube are optional for engines installed clamp on the original rigid fuel tube are safety, Incorporation by reference, on Learjet 35, 36, and 55 series optional for engines installed on Learjet Safety. airplanes. This amendment is prompted 35, 36, and 55 series airplanes. by confusion from operators regarding Since the issuance of AD 98±17±01, Adoption of the Amendment the applicability of these Learjet engine the FAA has received reports from installations. The actions specified by Accordingly, pursuant to the operators expressing confusion as to the authority delegated to me by the this AD are intended to prevent cracking applicability of engines installed on Administrator, the Federal Aviation of the fuel tube and the subsequent Learjet 35, 36, and 55 series airplanes. Administration amends part 39 of the leakage of fuel on or around electrical That AD did not affect the AlliedSignal components, which can cause an engine engine Model TFE731±2±2B and engine Federal Aviation Regulations (14 CFR fire. series TFE731±3A and ±3AR installed part 39) as follows: DATES: Effective November 29, 1999. on Learjet Models 35, 36, and 55 PART 39ÐAIRWORTHINESS The incorporation by reference of because starter generators are not used DIRECTIVES AlliedSignal Inc. Alert Service Bulletin on these airplanes. In addition, for this (ASB) TFE731±A73±3132, dated April application, there have been no reported 1. The authority citation for part 39 9, 1997, and ASB TFE731±A73±3128, fuel line failures. dated February 26, 1997, was approved Interested persons have been afforded continues to read as follows: by the Director of the Federal Register an opportunity to participate in the Authority: 49 U.S.C. 106(g), 40113, 44701. as of May 19, 1999 (63 FR 42691, Aug. making of this amendment. No 11, 1998). comments were received on the § 39.13 [Amended] The incorporation by reference of proposal or the FAA's determination of 2. Section 39.13 is amended by AlliedSignal Inc. Service Bulletin the cost to the public. The FAA has removing Amendment 39±10703 (63 FR TFE731±73±3107, Revision 4, dated determined that air safety and the 42691, August 11, 1998), and by adding April 20, 1994, listed in the regulations public interest require the adoption of a new airworthiness directive, is approved by the Director of the the rule as proposed. VerDate 25-SEP-99 09:52 Sep 28, 1999 Jkt 183247 PO 00000 Frm 00001 Fmt 4700 Sfmt 4700 E:\FR\FM\A29SE0.036 pfrm03 PsN: 29SER1 52424 Federal Register / Vol. 64, No. 188 / Wednesday, September 29, 1999 / Rules and Regulations Amendment 39±11332, to read as assessment of the effect of the modification, tube are optional. If the clamp assembly is follows: alteration, or repair on the unsafe condition used, install the clamp assembly in addressed by this AD; and, if the unsafe accordance with the Accomplishment 98±17±01 R1 AlliedSignal Inc.: condition has not been eliminated, the Instructions of AlliedSignal Inc. SB No. Amendment 39±11332. Docket 97±ANE± request should include specific proposed TFE731±73±3107, Revision 4, dated April 20, 51±AD. Revises AD 98±17±01, actions to address it. Amendment 39±10703. 1994. Compliance: Required as indicated, unless (c) An alternative method of compliance or Applicability: AlliedSignal Inc. (formerly accomplished previously. adjustment of the initial compliance time Allied-Signal Aerospace Company, Garrett To prevent cracked fuel tubes and the that provides an acceptable level of safety Engine Division and Garrett Turbine Engine subsequent leakage of fuel on and around Co.) TFE731±2, ±3, and ±4 series turbofan may be used if approved by the Manager, Los electrical components, which can cause an Angeles Aircraft Certification Office. engines with fuel tubes, part numbers (P/Ns) engine fire, accomplish the following: Operators shall submit their requests through 3071051±1, 3073729±1, or 3072886±1, (a) Except for engines installed on Learjet installed. These engines are installed on but 35, 36, and 55 airplanes, within 160 hours an appropriate FAA Principal Maintenance not limited to the following airplanes: Avions time-in-service (TIS) after the effective date Inspector, who may add comments and then Marcel Dassault Falcon 10, 50, and 100 of this AD, or prior to December 20, 1999, send it to the Manager, Los Angeles Aircraft series; Cessna Model 650, Citation III, VI, and whichever occurs first, install an improved Certification Office. VII; Learjet 31 (M31) 35, 36 and 55 series, flexible fuel tube, as follows: Note 2: Information concerning the Raytheon British Aerospace HS±125 series; (1) For engines installed on Cessna existence of approved alternative methods of and Sabreliner NA±265±65. airplanes, install in accordance with the compliance with this AD, if any, may be Note 1: This airworthiness directive (AD) Accomplishment Instructions of AlliedSignal obtained from the Los Angeles Aircraft applies to each engine identified in the Inc. Alert Service Bulletin (ASB) No. Certification Office. preceding applicability provision, regardless TFE731±A73±3132, dated April 9, 1997. of whether it has been modified, altered, or (2) For engines installed on all other (d) Special flight permits may be issued in repaired in the area subject to the airplanes except for the Learjet 35, 36 and 55 accordance with sections 21.197 and 21.199 requirements of this AD. For engines that series, install in accordance with the of the Federal Aviation Regulations (14 CFR have been modified, altered, or repaired so Accomplishment Instructions of AlliedSignal 21.197 and 21.199) to operate the airplane to that the performance of the requirements of Inc. ASB No. TFE731±A73±3128, dated a location where the requirements of this AD this AD is affected, the owner/operator must February 26, 1997. can be accomplished. request approval for an alternative method of (b) For engines installed on Learjet 35, 36, (e) The actions required by this AD shall compliance in accordance with paragraph (c) and 55, the improved flex tube and the clamp be done in accordance with the following of this AD. The request should include an assembly installed on the original rigid fuel AlliedSignal Inc. service documents: Document No. Pages Revision Date ASB TFE731±A73±3132 ............................................................................................................... 1±12 Original ............. Apr. 9, 1997. Total pages: 12. ASB TFE731±A73±3128 ..............................................................................................................