Federal Register / Vol. 63, No. 152 / Friday, August 7, 1998 / Rules and Regulations 42203 not have sufficient federalism To prevent structural failure of the main 12, 1998, and British Aerospace PUP implications to warrant the preparation spar web area caused by fatigue cracking or Mandatory Service Bulletin No. B121/105, of a Federalism Assessment. separation of the wing caused by loose nuts dated January 12, 1998, should be directed to For the reasons discussed above, I at the wing to fuselage main-spar attachment British Aerospace (Operations) Limited, certify that this action (1) is not a fittings, which could result in loss of control British Aerospace Regional Aircraft, of the airplane, accomplish the following: Prestwick International Airport, Ayrshire, ``significant regulatory action'' under (a) Within the next 100 hours time-in- KA9 2RW, Scotland; telephone: (01292) Executive Order 12866; (2) is not a service (TIS) after the effective date of this 479888; facsimile: (01292) 479703. This ``significant rule'' under DOT AD, replace the nuts (with improved design service information may be examined at the Regulatory Policies and Procedures (44 nuts) at the wing to fuselage main-spar FAA, Central Region, Office of the Regional FR 11034, February 26, 1979); and (3) attachment fittings in accordance with Counsel, Room 1558, 601 E. 12th Street, will not have a significant economic British Aerospace PUP Mandatory Service Kansas City, Missouri. impact, positive or negative, on a Bulletin No. B121/106, dated January 12, (h) The replacements, installation, and substantial number of small entities 1998. inspections required by this AD shall be done (b) Upon accumulating 2,000 hours TIS on in accordance with British Aerospace PUP under the criteria of the Regulatory the main spar or within the next 50 hours TIS Mandatory Service Bulletin No. B121/106, Flexibility Act. A copy of the final after the effective date of this AD, whichever dated January 12, 1998, and British evaluation prepared for this action is occurs later, install an inspection opening Aerospace PUP Mandatory Service Bulletin contained in the Rules Docket. A copy and inspect, using eddy current methods, the No. B121/105, dated January 12, 1998. This of it may be obtained by contacting the area at the main spar web for cracks in incorporation by reference was approved by Rules Docket at the location provided accordance with the ACCOMPLISHMENT the Director of the Federal Register in under the caption ADDRESSES. INSTRUCTIONS section of British Aerospace accordance with 5 U.S.C. 552(a) and 1 CFR PUP Mandatory Service Bulletin No. B121/ part 51. Copies may be obtained from British List of Subjects in 14 CFR Part 39 105, dated January 12, 1998. Aerospace (Operations) Limited, British Air transportation, Aircraft, Aviation Note 2: Accomplishing the installation Aerospace Regional Aircraft, Prestwick inspection opening and initial eddy current International Airport, Ayrshire, KA9 2RW, safety, Incorporation by reference, Scotland. Copies may be inspected at the Safety. inspection required by this AD in accordance with British Aerospace PUP Mandatory FAA, Central Region, Office of the Regional Adoption of the Amendment Service Bulletin No. B121/102, Revision No. Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri, or at the Office of the Accordingly, pursuant to the 1, Issued April 16, 1997, is considered ``already accomplished'' for the requirements Federal Register, 800 North Capitol Street, authority delegated to me by the of paragraph (b) of this AD. NW, suite 700, Washington, DC. Administrator, the Federal Aviation (c) Within 800 hours TIS after the initial Note 4: The subject of this AD is addressed Administration amends part 39 of the inspection required by paragraph (b) of this in British AD 005±01±98, not dated. Federal Aviation Regulations (14 CFR AD, and thereafter at intervals not to exceed (i) This amendment becomes effective on part 39) as follows: 800 hours TIS, reinspect the area of the main September 21, 1998. spar web as specified in paragraph (b) of this Issued in Kansas City, Missouri, on July 28, PART 39ÐAIRWORTHINESS AD. 1998. DIRECTIVES (d) If any cracks are found during any Michael Gallagher, inspection required by this AD, prior to Manager, Small Airplane Directorate, Aircraft 1. The authority citation for part 39 further flight, accomplish the following: Certification Service. continues to read as follows: (1) Obtain a repair or replacement scheme Authority: 49 U.S.C. 106(g), 40113, 44701. from the manufacturer through the FAA, [FR Doc. 98±20840 Filed 8±6±98; 8:45 am] Small Airplane Directorate, at the address BILLING CODE 4910±13±U § 39.13 [Amended] specified in paragraph (f) of this AD; and 2. Section 39.13 is amended by (2) Incorporate this scheme and continue to adding a new airworthiness directive repetitively inspect as required by paragraph DEPARTMENT OF TRANSPORTATION (AD) to read as follows: (c) of this AD, unless specified differently in the instructions to the repair or replacement Federal Aviation Administration 98±16±15 British Aerospace (Operations) scheme. Limited: Amendment 39±10691; Docket (e) Special flight permits may be issued in 14 CFR Part 39 No. 98±CE±03±AD. accordance with sections 21.197 and 21.199 Applicability: Model B.121 Series 1, 2, and of the Federal Aviation Regulations (14 CFR [Docket No. 98±CE±30±AD; Amendment 39± 3 airplanes, all serial numbers, certificated in 21.197 and 21.199) to operate the airplane to 10692; AD 98±16±16] any category. a location where the requirements of this AD RIN 2120±AA64 Note 1: This AD applies to each airplane can be accomplished. identified in the preceding applicability (f) An alternative method of compliance or Airworthiness Directives; Pilatus provision, regardless of whether it has been adjustment of the initial or repetitive Aircraft Ltd. Model PC±7 Airplanes modified, altered, or repaired in the area compliance times that provides an equivalent subject to the requirements of this AD. For level of safety may be approved by the AGENCY: Federal Aviation airplanes that have been modified, altered, or Manager, Small Airplane Directorate, Aircraft Administration, DOT. Certification Service, 1201 Walnut, suite 900, repaired so that the performance of the ACTION: Final rule. requirements of this AD is affected, the Kansas City, Missouri 64106. The request owner/operator must request approval for an shall be forwarded through an appropriate SUMMARY: This amendment adopts a alternative method of compliance in FAA Maintenance Inspector, who may add new airworthiness directive (AD) that accordance with paragraph (f) of this AD. The comments and then send it to the Manager, Small Airplane Directorate. applies to certain Pilatus Aircraft Ltd. request should include an assessment of the Model PC±7 airplanes. This AD requires effect of the modification, alteration, or repair Note 3: Information concerning the on the unsafe condition addressed by this existence of approved alternative methods of replacing the seal unit on both main AD; and, if the unsafe condition has not been compliance with this AD, if any, may be landing gear (MLG) legs and the nose eliminated, the request should include obtained from the Small Airplane landing gear (NLG) leg. This AD is the specific proposed actions to address it. Directorate. result of mandatory continuing Compliance: Required as indicated in the (g) Questions or technical information airworthiness information (MCAI) body of this AD, unless already related to British Aerospace PUP Mandatory issued by the airworthiness authority for accomplished. Service Bulletin No. B121/106, dated January Switzerland. The actions specified by 42204 Federal Register / Vol. 63, No. 152 / Friday, August 7, 1998 / Rules and Regulations this AD are intended to prevent MLG or public interest require the adoption of PART 39ÐAIRWORTHINESS NLG failure caused by deterioration of the rule as proposed except for minor DIRECTIVES a MLG or NLG leg seal unit, which editorial corrections. The FAA has 1. The authority citation for part 39 could result in damage to the airplane determined that these minor corrections continues to read as follows: or airplane control problems during will not change the meaning of the AD takeoff, landing, or taxi operations. and will not add any additional burden Authority: 49 U.S.C. 106(g), 40113, 44701. DATES: Effective September 21, 1998. upon the public than was already § 39.13 [Amended] The incorporation by reference of proposed. 2. Section 39.13 is amended by certain publications listed in the adding a new airworthiness directive regulations is approved by the Director Cost Impact (AD) to read as follows: of the Federal Register as of September The FAA estimates that 5 airplanes in 21, 1998. 98±16±16 Pilatus Aircraft Ltd.: Amendment the U.S. registry will be affected by this 39±10692; Docket No. 98±CE±30±AD. ADDRESSES: Service information that AD, that it will take approximately 8 applies to this AD may be obtained from Applicability: Model PC±7 airplanes, all workhours per airplane to accomplish Pilatus Aircraft Ltd., Customer Liaison manufacturer serial numbers (MSN) up to this action, and that the average labor and including MSN 609, certificated in any Manager, CH±6371 Stans, Switzerland; rate is approximately $60 an hour. Parts category. telephone: +41 41 619 6233; facsimile: cost approximately $932 per airplane. Note 1: This AD applies to each airplane +41 41 610 3351. This information may identified in the preceding applicability also be examined at the Federal Based on these figures, the total cost impact of this AD on U.S. operators is provision, regardless of whether it has been Aviation Administration (FAA), Central modified, altered, or repaired in the area Region, Office of the Regional Counsel, estimated to be $7,060, or $1,412 per subject to the requirements of this AD. For Attention: Rules Docket No.