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classified as ‘‘catastrophic’’ may be the 50 and Fokker 60 type design, in this as ‘‘the MCAI’’), to correct an unsafe shown by analysis, and appropriate response to these regulations, revealed that condition for the specified products. testing in combination with simulation the clearance between parts of the main The MCAI states: to validate the analysis. Very limited (MLG) and the fuel pipes may be insufficient. * * * [T]he Federal Aviation flight tests in combination with This condition, if not detected and Administration (FAA) has published Special simulation are used as a part of a corrected, could lead to chafing, possibly Federal Aviation Regulation (SFAR) 88, and showing of compliance for resulting in fuel leakage and, in combination the Joint Aviation Authorities (JAA) has ‘‘catastrophic’’ failure conditions. Flight with other factors, a fuel fire. published Interim Policy INT/POL/25/12. The review conducted by Fokker Services on tests are performed only in This AD requires actions that are circumstances that use operational the Fokker 50 and Fokker 60 type design, in intended to address the unsafe response to these regulations, revealed that variations, or extrapolations from other condition described in the MCAI. the clearance between parts of the main flight performance aspects to address DATES: This AD becomes effective April landing gear (MLG) and the fuel pipes may flight safety. be insufficient. These special conditions require that 28, 2011. The Director of the Federal Register This condition, if not detected and the Hoh AP/SAS system installed on a corrected, could lead to chafing, possibly approved the incorporation by reference Eurocopter model AS350B, AS350BA, resulting in fuel leakage and, in combination of certain publications listed in the AD AS350B1, AS350B2, AS350B3, AS350D, with other factors, a fuel fire. as of April 28, 2011. EASA issued AD 2010–0182 to require and EC130 helicopter, Type Certificate We must receive comments on this Number H9EU, meet these requirements actions to ensure that a minimum clearance AD by May 31, 2011. is maintained between the parts of the MLG to adequately address the failure effects ADDRESSES: You may send comments by and the fuel pipes in both nacelles. identified by the FHA, and subsequently Since that AD was issued, it was verified by the SSA, within the defined any of the following methods: • Federal eRulemaking Portal: Go to discovered that aeroplane serial numbers design system integrity requirements. http://www.regulations.gov. Follow the 20133 through 20142 were erroneously Issued in Fort Worth, Texas, on March 31, omitted in the original Fokker Service instructions for submitting comments. Bulletins (SB) and consequently the AD did 2011. • Fax: 202–493–2251. • not apply to those aeroplanes. The two SB’s Scott A. Horn, Mail: U.S. Department of (some typographical errors in part numbers Acting Manager, Rotorcraft Directorate, Transportation, Docket Operations, M– were also found) have now been revised to Certification Service. 30, West Building Ground Floor, Room correct this omission. [FR Doc. 2011–8294 Filed 4–12–11; 8:45 am] W12–140, 1200 New Jersey Avenue, SE., For the reasons described above, this new BILLING CODE 4910–13–P Washington, DC 20590. AD retains the requirements of AD 2010– • Hand Delivery: U.S. Department of 0182, which is superseded, and expands the Transportation, Docket Operations, M– Applicability to add the 10 missing serial DEPARTMENT OF TRANSPORTATION 30, West Building Ground Floor, Room numbers. W12–40, 1200 New Jersey Avenue, SE., The required actions include an Federal Aviation Administration Washington, DC, between 9 a.m. and 5 inspection to determine fuel pipe part p.m., Monday through Friday, except numbers, a general visual inspection to 14 CFR Part 39 Federal holidays. determine the clearance between certain fuel pipes and parts of the main landing [Docket No. FAA–2011–0262; Directorate Examining the AD Docket Identifier 2010–NM–215–AD; Amendment gear, and replacement of certain pipes 39–16649; AD 2011–07–12] You may examine the AD docket on with insufficient main landing gear the Internet at http:// clearance. The required actions also RIN 2120–AA64 www.regulations.gov; or in person at the include revising the maintenance Docket Operations office between 9 a.m. program to incorporate a fuel limitation Airworthiness Directives; Fokker and 5 p.m., Monday through Friday, and a critical design configuration Services B.V. Model F.27 Mark 050 except Federal holidays. The AD docket control limitation (CDCCL). You may Airplanes contains this AD, the regulatory obtain further information by examining AGENCY: Federal Aviation evaluation, any comments received, and the MCAI in the AD docket. Administration (FAA), Department of other information. The street address for The FAA has examined the Transportation (DOT). the Docket Operations office (phone: underlying safety issues involved in fuel 800–647–5527) is in the ADDRESSES tank explosions on several large ACTION: Final rule; request for section. Comments will be available in transport airplanes, including the comments. the AD docket shortly after receipt. adequacy of existing regulations, the SUMMARY: We are adopting a new FOR FURTHER INFORMATION CONTACT: Tom service history of airplanes subject to airworthiness directive (AD) for the Rodriguez, Engineer, those regulations, and existing products listed above. This AD results International Branch, ANM–116, maintenance practices for fuel tank from mandatory continuing Transport Airplane Directorate, FAA, systems. As a result of those findings, airworthiness information (MCAI) 1601 Lind Avenue, SW., Renton, we issued a regulation titled ‘‘Transport originated by an aviation authority of Washington 98057–3356; phone: 425– Airplane Fuel Tank System Design another country to identify and correct 227–1137; fax: 425–227–1149. Review, Flammability Reduction and an unsafe condition on an aviation SUPPLEMENTARY INFORMATION: Maintenance and Inspection product. The MCAI describes the unsafe Requirements’’ (66 FR 23086, May 7, Discussion condition as: 2001). In addition to new airworthiness The European Aviation Safety Agency standards for transport airplanes and * * * [T]he Federal Aviation Administration (FAA) has published Special (EASA), which is the Technical Agent new maintenance requirements, this Federal Aviation Regulation (SFAR) 88, and for the Member States of the European rule included Special Federal Aviation the Joint Aviation Authorities (JAA) has Community, has issued EASA Regulation No. 88 (‘‘SFAR 88,’’ published Interim Policy INT/POL/25/12. Airworthiness Directive 2010–0197, Amendment 21–78, and subsequent The review conducted by Fokker Services on dated October 1, 2010 (referred to after Amendments 21–82 and 21–83).

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Among other actions, SFAR 88 unsafe condition identified in the received by the closing date and may requires certain type design (i.e., type MCAI. amend this AD because of those certificate (TC) and supplemental type comments. FAA’s Determination and Requirements certificate (STC)) holders to substantiate We will post all comments we of This AD that their fuel tank systems can prevent receive, without change, to http:// ignition sources in the fuel tanks. This This product has been approved by www.regulations.gov, including any requirement applies to type design the aviation authority of another personal information you provide. We holders for large turbine-powered country, and is approved for operation will also post a report summarizing each transport airplanes and for subsequent in the United States. Pursuant to our substantive verbal contact we receive modifications to those airplanes. It bilateral agreement with the State of about this AD. Design Authority, we have been notified requires them to perform design reviews Authority for This Rulemaking and to develop design changes and of the unsafe condition described in the maintenance procedures if their designs MCAI and service information Title 49 of the United States Code do not meet the new fuel tank safety referenced above. We are issuing this specifies the FAA’s authority to issue standards. As explained in the preamble AD because we evaluated all pertinent rules on aviation safety. Subtitle I, to the rule, we intended to adopt information and determined the unsafe section 106, describes the authority of airworthiness directives to mandate any condition exists and is likely to exist or the FAA Administrator. ‘‘Subtitle VII: ’’ changes found necessary to address develop on other products of the same Aviation Programs, describes in more unsafe conditions identified as a result type design. detail the scope of the Agency’s of these reviews. There are no products of this type authority. We are issuing this rulemaking under In evaluating these design reviews, we currently registered in the United States. However, this rule is necessary to the authority described in ‘‘Subtitle VII, have established four criteria intended Part A, Subpart III, Section 44701: to define the unsafe conditions ensure that the described unsafe condition is addressed if any of these General requirements.’’ Under that associated with fuel tank systems that section, Congress charges the FAA with require corrective actions. The products are placed on the U.S. Register in the future. promoting safe flight of civil aircraft in percentage of operating time during air commerce by prescribing regulations which fuel tanks are exposed to Differences Between the AD and the for practices, methods, and procedures flammable conditions is one of these MCAI or Service Information the Administrator finds necessary for criteria. The other three criteria address We have reviewed the MCAI and safety in air commerce. This regulation the failure types under evaluation: related service information and, in is within the scope of that authority single failures, single failures in general, agree with their substance. But because it addresses an unsafe condition combination with a latent condition(s), we might have found it necessary to use that is likely to exist or develop on and in-service failure experience. For all different words from those in the MCAI products identified in this rulemaking four criteria, the evaluations included to ensure the AD is clear for U.S. action. consideration of previous actions taken operators and is enforceable. In making that may mitigate the need for further Regulatory Findings these changes, we do not intend to differ action. substantively from the information We determined that this AD will not The Joint Aviation Authorities (JAA) provided in the MCAI and related have federalism implications under Executive Order 13132. This AD will has issued a regulation that is similar to service information. SFAR 88. (The JAA is an associated We might also have required different not have a substantial direct effect on body of the European Civil Aviation actions in this AD from those in the the States, on the relationship between Conference (ECAC) representing the MCAI in order to follow FAA policies. the national government and the States, civil aviation regulatory authorities of a Any such differences are highlighted in or on the distribution of power and number of European States who have a NOTE within the AD. responsibilities among the various agreed to co-operate in developing and levels of government. implementing common safety regulatory FAA’s Determination of the Effective For the reasons discussed above, I standards and procedures.) Under this Date certify this AD: 1. Is not a ‘‘significant regulatory regulation, the JAA stated that all Since there are currently no domestic action’’ under Executive Order 12866; members of the ECAC that hold type operators of this product, notice and certificates for transport category 2. Is not a ‘‘significant rule’’ under the opportunity for public comment before DOT Regulatory Policies and Procedures airplanes are required to conduct a issuing this AD are unnecessary. design review against explosion risks. (44 FR 11034, February 26, 1979); and 3. Will not have a significant We have determined that the actions Comments Invited economic impact, positive or negative, identified in this AD are necessary to This AD is a final rule that involves on a substantial number of small entities reduce the potential of ignition sources requirements affecting flight safety, and under the criteria of the Regulatory inside fuel tanks, which, in combination we did not precede it by notice and Flexibility Act. with flammable fuel vapors, could result opportunity for public comment. We We prepared a regulatory evaluation in fuel tank explosions and consequent invite you to send any written relevant of the estimated costs to comply with loss of the airplane. data, views, or arguments about this AD. this AD and placed it in the AD docket. Send your comments to an address Relevant Service Information listed under the ADDRESSES section. List of Subjects in 14 CFR Part 39 Fokker Services B.V. has issued Include ‘‘Docket No. FAA–2011–0262; Air transportation, Aircraft, Aviation Service Bulletin SBF50–28–028, Directorate Identifier 2010–NM–215– safety, Incorporation by reference, Revision 1, dated September 15, 2010; AD’’ at the beginning of your comments. Safety. and Service Bulletin SBF50–28–031, We specifically invite comments on the Revision 1, dated September 15, 2010. overall regulatory, economic, Adoption of the Amendment The actions described in this service environmental, and energy aspects of Accordingly, under the authority information are intended to correct the this AD. We will consider all comments delegated to me by the Administrator,

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the FAA amends 14 CFR part 39 as Compliance alternative actions (e.g., inspection, interval) follows: (f) You are responsible for having the and/or CDCCLs may be used unless the actions required by this AD performed within actions, intervals, and/or CDCCLs are PART 39—AIRWORTHINESS the compliance times specified, unless the approved as an AMOC in accordance with DIRECTIVES actions have already been done. the procedures specified in paragraph (n) of this AD. Inspection ■ Credit for Actions Accomplished in 1. The authority citation for part 39 (g) Within 6 months after the effective date continues to read as follows: Accordance With Previous Service of this AD: Inspect the part numbers of each Information Authority: 49 U.S.C. 106(g), 40113, 44701. fuel pipe (two in each nacelle), in accordance with Part 1 of the Accomplishment (m) Actions accomplished prior to the § 39.13 [Amended] Instructions of Fokker Service Bulletin effective date of this AD, in accordance with SBF50–28–028, Revision 1, dated September Fokker Service Bulletin SBF50–28–028, ■ 2. The FAA amends § 39.13 by adding 15, 2010. dated May 20, 2010; or Service Bulletin the following new AD: (h) If, as a result of the inspection required SBF50–28–031, dated May 20, 2010; as by paragraph (g) of this AD, fuel pipe part applicable; are acceptable to comply with the 2011–07–12 Fokker Services B.V.: corresponding requirements of this AD. Amendment 39–16649. Docket No. numbers other than those specified in Part 1 of the Accomplishment Instructions of FAA–2011–0262; Directorate Identifier FAA AD Differences Fokker Service Bulletin SBF50–28–028, 2010–NM–215–AD. Revision 1, dated September 15, 2010, are Note 2: This AD differs from the MCAI Effective Date found to be installed: Before further flight, do and/or service information as follows: a general visual inspection to determine the Although EASA Airworthiness Directive (a) This airworthiness directive (AD) 2010–0197, dated October 1, 2010, specifies becomes effective April 28, 2011. clearance between the fuel pipes and the parts of the main landing gear, and for both revising the maintenance program to Affected ADs chafing marks, in accordance with Part 2 of include airworthiness limitations, and doing certain repetitive actions (e.g., inspections) (b) None. the Accomplishment Instructions of Fokker Service Bulletin SBF50–28–028, Revision 1, and/or maintaining CDCCLs, this AD only Applicability dated September 15, 2010. requires the revision. Requiring a revision of the maintenance program, rather than (c) This AD applies to Fokker Services B.V. Fuel Pipe Replacement requiring individual repetitive actions and/or Model F.27 Mark 050 airplanes; certificated maintaining CDCCLs, requires operators to in any category; serial numbers 20133 (i) If, during the inspection required by paragraph (h) of this AD, the measured record AD compliance only at the time the through 20335 inclusive; except those with revision is made. Repetitive actions and/or inboard fuel tanks installed. clearance is less than or equal to 3.0 mm and greater than 1.5 mm for one or more fuel maintaining CDCCLs specified in the Note 1: This AD requires revisions to pipes, and no chafing marks are found: airworthiness limitations must be complied certain operator maintenance documents to Within 24 months after the effective date of with in accordance with 14 CFR 91.403(c). include new actions (e.g., inspections) and/ this AD, install new fuel pipes in both engine Other FAA AD Provisions or critical design configuration control nacelles, in accordance with the limitations (CDCCLs). Compliance with these Accomplishment Instructions of Fokker (n) The following provisions also apply to actions and/or CDCCLs is required by 14 CFR Service Bulletin SBF50–28–031, Revision 1, this AD: 91.403(c). For airplanes that have been dated September 15, 2010. (1) Alternative Methods of Compliance previously modified, altered, or repaired in (j) If, during the inspection required by (AMOCs): The Manager, International the areas addressed by this AD, the operator paragraph (h) of this AD, the measured Branch, ANM–116, Transport Airplane may not be able to accomplish the actions clearance is less than or equal to 1.5 mm for Directorate, FAA, has the authority to described in the revisions. In this situation, one or more fuel pipes, or chafing marks are approve AMOCs for this AD, if requested to comply with 14 CFR 91.403(c), the found on one or more fuel pipes: Before using the procedures found in 14 CFR 39.19. operator must request approval of an further flight, install new fuel pipes in both Send information to ATTN: Tom Rodriguez, alternative method of compliance (AMOC) engine nacelles, in accordance with the Aerospace Engineer, International Branch, according to paragraph (n) of this AD. The Accomplishment Instructions of Fokker’s ANM–116, Transport Airplane Directorate, request should include a description of Service Bulletin SBF50–28–031, Revision 1, FAA 1601 Lind Avenue, SW., Renton, changes to the required actions that will dated September 15, 2010. Washington 98057–3356; phone: 425–227– ensure the continued operational safety of 1137; fax: 425–227–1149. Information may be the airplane. Maintenance Program Revision To Add Fuel e-mailed to: 9-ANM-116-AMOC- Airworthiness Limitation [email protected]. Before using any Subject (k) Within 6 months after the effective date approved AMOC, notify your appropriate (d) Air Transport Association (ATA) of of this AD, revise the airplane maintenance principal inspector, or lacking a principal America Code 28: Fuel. program by incorporating the limitations inspector, the manager of the local flight Reason specified in paragraphs (k)(1) and (k)(2) of standards district office/certificate holding this AD. district office. (e) The mandatory continued airworthiness (1) The CDCCL specified in paragraph (2) Airworthy Product: For any information (MCAI) states: 1.L.(1)(c) of Fokker Service Bulletin SBF50– requirement in this AD to obtain corrective * * * [T]he Federal Aviation 28–031, Revision 1, dated September 15, actions from a manufacturer or other source, Administration (FAA) has published Special 2010. use these actions if they are FAA-approved. Federal Aviation Regulation (SFAR) 88, and (2) The fuel airworthiness limitation Corrective actions are considered FAA- the Joint Aviation Authorities (JAA) has specified in paragraph 1.L.(1)(c) of Fokker approved if they are approved by the State published Interim Policy INT/POL/25/12. Service Bulletin SBF50–28–028, Revision 1, of Design Authority (or their delegated The review conducted by Fokker Services on dated September 15, 2010. The initial agent). You are required to assure the product the Fokker 50 and Fokker 60 type design, in compliance time for doing the inspection is is airworthy before it is returned to service. response to these regulations, revealed that within 4,800 flight hours after doing the Related Information the clearance between parts of the main inspection required by paragraph (h) of this landing gear (MLG) and the fuel pipes may AD. (o) Refer to MCAI European Aviation be insufficient. Safety Agency (EASA) Airworthiness This condition, if not detected and No Alternative Actions, Intervals, and/or Directive 2010–0197, dated October 01, 2010; corrected, could lead to chafing, possibly CDCCLs Fokker Service Bulletin SBF50–28–028, resulting in fuel leakage and, in combination (l) After accomplishing the revision Revision 1, dated September 15, 2010; and with other factors, a fuel fire. required by paragraph (k) of this AD, no Fokker Service Bulletin SBF50–28–031,

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Revision 1, dated September 15, 2010; for another country to identify and correct Discussion related information. an unsafe condition on an aviation The European Aviation Safety Agency Material Incorporated by Reference product. The MCAI describes the unsafe condition as: (EASA), which is the Technical Agent (p) You must use Fokker Service Bulletin for the Member States of the European SBF50–28–028, Revision 1, dated September An operator has reported cracks on the aft Community, has issued EASA 15, 2010; and Fokker Service Bulletin hinge FWD [forward] fittings of the NLG Airworthiness Directive 2010–0028, SBF50–28–031, Revision 1, dated September [nose landing gear] aft doors (Right Hand dated February 23, 2010 (referred to 15, 2010; as applicable; to do the actions (RH) side or Left Hand (LH) side). The cracks required by this AD, unless the AD specifies extended by approximately 15 millimetres after this as ‘‘the MCAI’’), to correct an otherwise. from the upper hole to the edge of the unsafe condition for the specified (1) The Director of the Federal Register fittings. products. The MCAI states: approved the incorporation by reference of * * * Cracks on the NLG aft door fittings, An operator has reported cracks on the aft this service information under 5 U.S.C. if not corrected, could lead to the loss in hinge FWD [forward] fittings of the NLG 552(a) and 1 CFR part 51. flight of the door, possibly resulting in injury [nose landing gear] aft doors (Right Hand (2) For service information identified in to persons on the ground or aeroplane (RH) side or Left Hand (LH) side). The crack this AD, contact Fokker Services B.V., damages. extended by approximately 15 millimetres Technical Services Dept., P.O. Box 231, 2150 * * * * * from the upper hole to the edge of the AE Nieuw-Vennep, the ; phone: This AD requires actions that are fittings. +31 (0)252–627–350; fax: +31 (0)252–627– intended to address the unsafe Investigation has revealed that these cracks 211; e-mail: condition described in the MCAI. have initiated due to fatigue loads and [email protected]; propagated under bending load. Cracks on DATES: Internet: http://www.myfokkerfleet.com. This AD becomes effective April the NLG aft door fittings, if not corrected, (3) You may review copies of the service 28, 2011. could lead to the loss in flight of the door, information at the FAA, Transport Airplane The Director of the Federal Register possibly resulting in injury to persons on the Directorate, 1601 Lind Avenue, SW., Renton, approved the incorporation by reference ground or aeroplane damages. Washington. For information on the of a certain publication listed in the AD Consequently, in order to maintain the availability of this material at the FAA, call as of April 28, 2011. structural integrity of the NLG aft door aft 425–227–1221. We must receive comments on this hinge attachment fittings, this AD requires (4) You may also review copies of the AD by May 31, 2011. repetitive [detailed] inspections [for cracking] service information that is incorporated by ADDRESSES: You may send comments by of the area and fittings replacement in case reference at the National Archives and of finding [including repetitive high Records Administration (NARA). For any of the following methods: • Federal eRulemaking Portal: Go to frequency eddy current inspections or information on the availability of this fluorescent penetrant inspections for material at NARA, call 202–741–6030, or go http://www.regulations.gov. Follow the cracking of the area for certain findings until _ to: http://www.archives.gov/federal register/ instructions for submitting comments. the replacement is done]. code_of_federal_regulations/ • Fax: (202) 493–2251. ibr_locations.html. • Mail: U.S. Department of Required actions also include, for Issued in Renton, Washington, on March Transportation, Docket Operations, M– airplanes on which the forward fitting of 22, 2011. 30, West Building Ground Floor, Room the NLG aft door aft hinge is replaced, Kalene C. Yanamura, W12–140, 1200 New Jersey Avenue, SE., repetitive detailed inspections for Washington, DC 20590. cracking of the replaced fitting; and if Acting Manager, Transport Airplane • Directorate, Aircraft Certification Service. Hand Delivery: U.S. Department of any cracking is found, replacement of both forward and aft fittings by new [FR Doc. 2011–7743 Filed 4–12–11; 8:45 am] Transportation, Docket Operations, M– 30, West Building Ground Floor, Room fittings on the aft hinge of the affected BILLING CODE 4910–13–P W12–40, 1200 New Jersey Avenue, SE., NLG aft door. You may obtain further Washington, DC, between 9 a.m. and 5 information by examining the MCAI in DEPARTMENT OF TRANSPORTATION p.m., Monday through Friday, except the AD docket. Federal holidays. Relevant Service Information Federal Aviation Administration Examining the AD Docket Airbus has issued Mandatory Service 14 CFR Part 39 You may examine the AD docket on Bulletin A340–52–5016, including the Internet at http:// Appendices 01 and 02, Revision 02, [Docket No. FAA–2011–0263; Directorate www.regulations.gov; or in person at the dated August 25, 2010. The actions Identifier 2010–NM–105–AD; Amendment Docket Operations office between 9 a.m. 39–16653; AD 2011–08–03] described in this service information are and 5 p.m., Monday through Friday, intended to correct the unsafe condition RIN 2120–AA64 except Federal holidays. The AD docket identified in the MCAI. contains this AD, the regulatory Airworthiness Directives; Airbus Model evaluation, any comments received, and FAA’s Determination and Requirements A340–541 and –642 Airplanes other information. The street address for of This AD AGENCY: Federal Aviation the Docket Operations office (phone: This product has been approved by Administration (FAA), Department of 800–647–5527) is in the ADDRESSES the aviation authority of another Transportation (DOT). section. Comments will be available in country, and is approved for operation the AD docket shortly after receipt. ACTION: Final rule; request for in the United States. Pursuant to our FOR FURTHER INFORMATION CONTACT: comments. bilateral agreement with the State of Vladimir Ulyanov, Aerospace Engineer, Design Authority, we have been notified SUMMARY: We are adopting a new International Branch, ANM–116, of the unsafe condition described in the airworthiness directive (AD) for the Transport Airplane Directorate, FAA, MCAI and service information products listed above. This AD results 1601 Lind Avenue, SW., Renton, referenced above. We are issuing this from mandatory continuing Washington 98057–3356; telephone: AD because we evaluated all pertinent airworthiness information (MCAI) 425–227–1138; fax: 425–227–1149. information and determined the unsafe originated by an aviation authority of SUPPLEMENTARY INFORMATION: condition exists and is likely to exist or

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