Federal Register / Vol. 75, No. 221 / Wednesday, November 17, 2010 / Rules and Regulations 70101

on the availability of this material at the Examining the Docket: You may these figures, we estimate the total cost FAA, call (816) 329–4148. examine the docket that contains this impact of this AD on U.S. operators to (4) You may also review copies of the AD, any comments, and other be $101,700, assuming the gear is service information incorporated by reference replaced on the entire fleet. for this AD at the National Archives and information on the Internet at http:// www.regulations.gov or at the Docket Records Administration (NARA). For Regulatory Findings information on the availability of this Operations office, West Building material at NARA, call (202) 741–6030, or go Ground Floor, Room W12–140, 1200 We have determined that this AD will to: http://www.archives.gov/federal_register/ New Jersey Avenue, SE., Washington, not have federalism implications under code_of_federal_regulations/ DC. Executive Order 13132. This AD will ibr_locations.html. FOR FURTHER INFORMATION CONTACT: not have a substantial direct effect on Issued in Kansas City, Missouri, on Michael Schwetz, Aviation Safety the States, on the relationship between November 1, 2010. Engineer, Boston Aircraft Certification the national Government and the States, John Colomy, Office, 12 New England Executive Park, or on the distribution of power and Acting Manager, Small Airplane Directorate, Burlington, MA 01803, telephone (781) responsibilities among the various Aircraft Certification Service. 238–7761, fax (781) 238–7170. levels of government. [FR Doc. 2010–27980 Filed 11–16–10; 8:45 am] SUPPLEMENTARY INFORMATION: A For the reasons discussed above, I BILLING CODE 4910–13–P proposal to amend 14 CFR part 39 to certify that the regulation: include an AD for the specified model 1. Is not a ‘‘significant regulatory action’’ under Executive Order 12866; DEPARTMENT OF TRANSPORTATION helicopters was published in the Federal Register on May 13, 2010 (75 2. Is not a ‘‘significant rule’’ under the Federal Aviation Administration FR 26888). That action proposed to DOT Regulatory Policies and Procedures require a UT inspection of the gear for (44 FR 11034, February 26, 1979); and 14 CFR Part 39 a crack and replacing any cracked gear 3. Will not have a significant before further flight. The proposal was economic impact, positive or negative, [Docket No. FAA–2010–0490; Directorate prompted by three gear crack incidents, Identifier 2010–SW–037–AD; Amendment on a substantial number of small entities 39–16514; AD 2010–23–24] one of which resulted in the tail rotor under the criteria of the Regulatory separating from the helicopter. The tail Flexibility Act. RIN 2120–AA64 gearbox on the helicopter where the tail We prepared an economic evaluation rotor separated from the helicopter of the estimated costs to comply with Airworthiness Directives; Sikorsky experienced a fracture of the output Aircraft Corporation (Sikorsky) Model this AD. See the AD docket to examine shaft spline that drives the tail rotor the economic evaluation. S–70A and S–70C Helicopters blades. An investigation into the cause AGENCY: Federal Aviation of the cracks is ongoing. The unsafe Authority for This Rulemaking Administration, DOT. condition described previously, if not Title 49 of the United States Code ACTION: Final rule. corrected, could result in a tail rotor specifies the FAA’s authority to issue separating, loss of tail rotor control, and rules on aviation safety. Subtitle I, SUMMARY: This amendment adopts a subsequent loss of control of the Section 106 describes the authority of new airworthiness directive (AD) for the helicopter. the FAA Administrator. Subtitle VII, Sikorsky Model S–70A and S–70C We have reviewed Sikorsky Alert Aviation Programs, describes in more helicopters. This AD requires an Service Bulletin No. 70–06–28A, detail the scope of the agency’s ultrasonic test (UT) inspection of the tail Revision A, dated May 21, 2009 (ASB), authority. gearbox output bevel gear (gear) for a which refers to procedures for a UT We are issuing this rulemaking under crack. If you find a crack, replacing the inspection of the gear in accordance the authority described in Subtitle VII, gear with an airworthy gear is required with Special Service Instructions (SSI) Part A, Subpart III, Section 44701, before further flight. This AD is No. 70–121A or latest revision. prompted by three gear cracking This unsafe condition is likely to exist ‘‘General requirements.’’ Under that incidents, one of which resulted in the or develop on other helicopters of the section, Congress charges the FAA with tail rotor separating from the helicopter. same type design. Therefore, this AD promoting safe flight of civil aircraft in The actions specified by this AD are requires a UT inspection of the gear, air commerce by prescribing regulations intended to detect a crack in the gear to part number 70358–06620, for a crack. for practices, methods, and procedures prevent a tail rotor separating, loss of If a crack is found, this AD requires the Administrator finds necessary for tail rotor control, and subsequent loss of replacing the gear with an airworthy safety in air commerce. This regulation control of the helicopter. gear before further flight. The actions is within the scope of that authority DATES: Effective December 22, 2010. are required to be to be done by because it addresses an unsafe condition The incorporation by reference of following the SSI described previously. that is likely to exist or develop on certain publications listed in the We provided the public the products identified in this AD. regulations is approved by the Director opportunity to participate in developing List of Subjects in 14 CFR Part 39 of the Federal Register as of December this AD. We received no comments on 22, 2010. the proposal or on the determination of Air transportation, Aircraft, Aviation ADDRESSES: You may get the service the cost to the public. Therefore, we are safety, Incorporation by reference, information identified in this AD from adopting the action as proposed with Safety. Sikorsky Aircraft Corporation, Attn: only minor non-substantive changes. Adoption of the Amendment Manager, Commercial Technical We estimate that this AD affects 5 Support, mailstop s581a, 6900 Main helicopters in the U.S. registry. The ■ Accordingly, under the authority Street, Stratford, CT, telephone (203) actions will take about 4 work hours per delegated to me by the Administrator, 383–4866, e-mail address helicopter at an average labor rate of $85 the Federal Aviation Administration [email protected], or at http:// per work hour. Required parts cost amends part 39 of the Federal Aviation www.sikorsky.com. about $20,000 for each gear. Based on Regulations (14 CFR part 39) as follows:

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PART 39—AIRWORTHINESS Issued in Fort Worth, Texas, on November Friday, except Federal holidays. The AD DIRECTIVES 1, 2010. docket contains this AD, the regulatory Kim Smith, evaluation, any comments received, and ■ 1. The authority citation for part 39 Manager, Rotorcraft Directorate, Aircraft other information. The address for the continues to read as follows: Certification Service. Docket Office (telephone 800–647–5527) Authority: 49 U.S.C. 106(g), 40113, 44701. [FR Doc. 2010–28458 Filed 11–16–10; 8:45 am] is the Document Management Facility, BILLING CODE 4910–13–P U.S. Department of Transportation, § 39.13 [Amended] Docket Operations, M–30, West ■ 2. FAA amends § 39.13 by adding the Building Ground Floor, Room W12–140, following new AD: DEPARTMENT OF TRANSPORTATION 1200 New Jersey Avenue, SE., Washington, DC 20590. 2010–23–24 Sikorsky Aircraft Corp.: Federal Aviation Administration Amendment 39–16514; Docket No. FOR FURTHER INFORMATION CONTACT: Kevin Nguyen, Aerospace Engineer, FAA–2010–0490; Directorate Identifier 14 CFR Part 39 2010–SW–037–AD. Propulsion Branch, ANM–140S, FAA, Applicability: Model S–70A and S–70C [Docket No. FAA–2010–0376; Directorate Seattle Aircraft Certification Office helicopters with a tail gearbox output bevel Identifier 2009–NM–267–AD; Amendment (ACO), 1601 Lind Avenue, SW., Renton, gear (gear), part number 70358–06620, 39–16504; AD 2010–23–15] Washington 98057–3356; telephone certificated in any category. (425) 917–6501; fax (425) 917–6590. RIN 2120–AA64 Compliance: Required as indicated. SUPPLEMENTARY INFORMATION: To prevent a tail rotor separating, loss of tail rotor control, and subsequent loss of Airworthiness Directives; The Boeing Discussion control of the helicopter, do the following: Company Model 777–200, –200LR, –300, and –300ER Series Airplanes We issued a notice of proposed (a) Within 500 hours time-in-service (TIS), rulemaking (NPRM) to amend 14 CFR unless accomplished previously, and thereafter at intervals not to exceed 500 hours AGENCY: Federal Aviation part 39 to include an airworthiness TIS, remove the tail rotor servo control and Administration (FAA), DOT. directive (AD) that would apply to pitch beam shaft, and using a Level II ACTION: Final rule. certain Model 777–200, –200LR, –300, Ultrasonic Testing Technician or equivalent, and –300ER series airplanes. That ultransonic inspect the gear for a crack. SUMMARY: We are adopting a new NPRM was published in the Federal Ultrasonic inspect the gear by following airworthiness directive (AD) for certain Register on April 8, 2010 (75 FR 17889). paragraphs A.(5)a. through A(5)n. of Special Model 777–200, –200LR, –300, and That NPRM proposed to require Service Instructions No. 70–121A, Revision –300ER series airplanes. This AD removing and repairing the sealant at A, dated May 21, 2009. If you find a crack, requires removing and repairing the the four lower corners of the wing before further flight, replace the gear with an airworthy gear. sealant at the four lower corners of the center section and the four lower t- (b) To request a different method of wing center section and the four lower chord segment gaps on each side of the compliance or a different compliance time t-chord segment gaps on each side of the wing center section. wing center section. This AD results for this AD, follow the procedures in 14 CFR Comments 39.19. Contact the Manager, Boston Aircraft from reports of fuel leakage from the Certification Office, FAA, Attn: Michael center tank. We are issuing this AD to We gave the public the opportunity to Schwetz, Aviation Safety Engineer, Boston detect and correct improperly applied participate in developing this AD. We Aircraft Certification Office, 12 New England sealant, which could result in the considered the comments received from Executive Park, Burlington, MA 01803, disbonding and displacing of sealant, the two commenters. telephone (781) 238–7761, fax (781) 238– 7170, for information about previously and consequent fuel leaks. On the Support for the NPRM approved alternative methods of compliance. ground, uncontained fuel leakage could result in pooling, and pooling combined Continental Airlines (CAL) stated that (c) The Joint Aircraft System/Component it concurs with intent of the NRPM to (JASC) Code is 6520: Tail rotor gearbox. with an ignition source could result in ensure a high level of safety for the (d) The inspections shall be done in a fire. Model 777 airplane fleet. accordance with the specified portions of DATES: This AD is effective December Sikorsky Special Service Instructions No. 70– 22, 2010. Request to Include Revised Inspection 121A, Revision A, dated May 21, 2009. The Criteria in Revised Service Information Director of the Federal Register approved this The Director of the Federal Register incorporation by reference in accordance approved the incorporation by reference Boeing requested that we revise the with 5 U.S.C. 552(a) and 1 CFR part 51. of a certain publication listed in the AD NPRM to refer to Revision 2 of Boeing Copies may be obtained from Sikorsky as of December 22, 2010. Special Attention Service Bulletin 777– Aircraft Corporation, Attn: Manager, ADDRESSES: For service information 57–0063. Boeing stated that this revision Commercial Technical Support, mailstop identified in this AD, contact Boeing includes an alternative inspection, and, s581a, 6900 Main Street, Stratford, CT, Commercial Airplanes, Attention: Data depending on the inspection findings, it telephone (203) 383–4866, e-mail address [email protected], or at http:// & Services Management, P.O. Box 3707, may be unnecessary to remove and www.sikorsky.com. Copies may be inspected MC 2H–65, Seattle, Washington 98124– replace the sealant. Furthermore, Boeing at the FAA, Office of the Regional Counsel, 2207; telephone 206–544–5000, requested that we provide credit for Southwest Region, 2601 Meacham Blvd., extension 1; fax 206–766–5680; e-mail actions accomplished in accordance Room 663, Fort Worth, Texas or at the [email protected]; Internet with Boeing Special Attention Service National Archives and Records https://www.myboeingfleet.com. Bulletin 777–57–0063, Revision 1, dated Administration (NARA). For information on May 14, 2009. the availability of this material at NARA, call Examining the AD Docket CAL also requested a provision to 202–741–6030, or go to: http://www.archives. _ _ _ _ You may examine the AD docket on allow the inspection of the sealant gov/federal register/code of federal the Internet at http:// condition in the affected areas before regulations/ibr_locations.html. www.regulations.gov; or in person at the the sealant repair that is specified by (e) This amendment becomes effective Docket Management Facility between 9 Boeing Special Attention Service on December 22, 2010. a.m. and 5 p.m., Monday through Bulletin 777–57–0063, Revision 1, dated

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