Background \n\n\n\tThe European Union Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Community, has issued EASA AD 2020-0151-E, dated July 9, 2020, for Safran Helicopter Engines Arriel 1B, Arriel 1C, Arriel 1C2, and Arriel 1D1 model turboshaft engines, and AD 2020-0161-E, dated July 17, 2020, for Safran Helicopter Engines Astazou XIV B and Astazou XIV H model turboshaft engines to address an unsafe condition for the specified products. EASA AD 2020-0151-E states: \n\n\n\tPositive segregation (freckles) was detected on Stage 2 HP turbine discs manufactured from a certain block of material. Other parts manufactured from that same block of material may also be affected by this non-conformity. \n\tThis condition, if not corrected, could lead to HP turbine disc failure and result in high-energy debris release, with consequent damage to, and reduced control of, the helicopter. \n\tTo address this unsafe condition,SAFRAN issued the MSB, as defined in this (EASA) AD, to identify affected HP turbine discs and provide instructions for replacement. \n\tFor the reason described above, this (EASA) AD requires replacement of affected parts with serviceable parts, and prohibits re-installation of affected parts. \n\n\n\tEASA AD 2020-0161-E states: \n\n\n\tPositive segregation (freckles) was detected on Stage 3 turbine wheels manufactured from a certain block of material. Other parts manufactured from that same block of material may also be affected by this non-conformity. \n\tThis condition, if not corrected, could lead to turbine wheel failure and result in high-energy debris release, with consequent damage to, and reduced control of, the helicopter. \n\tTo address this unsafe condition, SAFRAN issued the MSB, as defined in this (EASA) AD, to identify affected turbine wheels and provide instructions for replacement. \n\tFor the reason described above, this (EASA) AD requires replacement of affected parts with serviceable parts, and prohibits re-installation of affected parts. \n\n\n\tYou may obtain further information by examining the MCAIs in the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA-2021-0132. \n\nFAA's Determination \n\n\n\tThis product has been approved by EASA and is approved for operation in the United States. Pursuant to our bilateral agreement with the European Community, EASA has notified us of the unsafe condition described in the MCAI. The FAA is issuing this AD because the agency evaluated all the relevant information provided by EASA and has determined that the unsafe condition described previously is likely to exist or develop in other products of the same type design. \n\nRelated Service Information \n\n\n\tThe FAA reviewed Safran Mandatory Service Bulletin (MSB) 292 72 0860, Version A, dated July 9, 2020 (MSB 292 72 0860). MSB 292 72 0860 identifies affected Stage 2 HPT disks and describes procedures for removing and replacing affected Stage 2 HPT disks on Safran Helicopter Engines Arriel 1B, Arriel 1C, Arriel 1C2, and Arriel 1D1 model turbofan engines. The FAA also reviewed Safran MSB 283 72 0814, Version A, dated July 16, 2020 (MSB 283 72 0814). MSB 283 72 0814 describes procedures for replacing the Stage 3 turbine wheel on Safran Helicopter Engines Astazou XIV B and Astazou XIV H model turbofan engines. \n\nAD Requirements \n\n\n\tThis AD requires the removal from service and replacement of affected Stage 2 HPT disks for Safran Helicopter Engines Arriel 1B, Arriel 1C, Arriel 1C2, and Arriel 1D1 model turbofan engines. \n\n((Page 12808)) \n\nThis AD also requires the removal from service and replacement of each affected Stage 3 turbine wheel for Safran Helicopter Engines Astazou XIV B and Astazou XIV H model turbofan engines. \n\nDifferences Between This AD and the MCAI or Service Information \n\n\n\tEASA AD 2020-0161-E requires operators to use Safran Helicopter Engines service information to perform the removal and replacement of affected Stage 2 HPT disks while this AD does not. \n\nJustification for Immediate Adoption and Determination of the Effective Date \n\n\n\tSection 553(b)(3)(B) of the Administrative Procedure Act (APA) (5 U.S.C. 551 et seq.) authorizes agencies to dispense with notice and comment procedures for rules when the agency, for ''good cause,'' finds that those procedures are ''impracticable, unnecessary, or contrary to the public interest.'' Under this section, an agency, upon finding good cause, may issue a final rule without providing notice and seeking comment prior to issuance. Further, section 553(d) of the APA authorizes agencies to make rules effective in less than thirty days, upon a finding of good cause. \n\tThe FAA has found the risk to the flying public justifies waiving notice and comment prior to adoption of this rule because no domestic operators use this product. It is unlikely that the FAA will receive any adverse comments or useful information about this AD from any U.S. operator. Accordingly, notice and opportunity for prior public comment are unnecessary, pursuant to 5 U.S.C. 553(b)(3)(B). In addition, for the foregoing reason(s), the FAA finds that good cause exists pursuant to 5 U.S.C. 553(d) for making this amendment effective in less than 30 days. \n\nComments Invited \n\n\n\tThe FAA invites you to send any written data, views, or arguments about this final rule. Send your comments to an address listed under ADDRESSES. Include Docket No. FAA-2021-0132 and Project Identifier MCAI-2020-00947-E at the beginning of your comments. The most helpful comments reference a specific portion of the final rule, explain the reason for any recommended change, and include supporting data. The FAA will consider all comments received by the closing date and may amend this final rule because of those comments. \n\tExcept for Confidential Business Information (CBI) as described in the following paragraph, and other information as described in 14 CFR 11.35, the FAA will post all comments received, without change, to https://www.regulations.gov, including any personal information you provide. The agency will also post a report summarizing each substantive verbal contact received about this final rule. \n\nConfidential Business Information \n\n\n\tCBI is commercial or financial information that is both customarily and actually treated as private by its owner. Under the Freedom of Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public disclosure. If your comments responsive to this AD contain commercial or financial information that is customarily treated as private, that you actually treat as private, and that is relevant or responsive to this AD, it is important that you clearly designate the submitted comments as CBI. Please mark each page of your submission containing CBI as ''PROPIN.'' The FAA will treat such marked submissions as confidential under the FOIA, and they will not be placed in the public docket of this AD.Submissions containing CBI should be sent to Wego Wang, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803. Any commentary that the FAA receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking. \n\nRegulatory Flexibility Act \n\n\n\tThe requirements of the Regulatory Flexibility Act (RFA) do not apply when an agency finds good cause pursuant to 5 U.S.C. 553 to adopt a rule without prior notice and comment. Because FAA has determined that it has good cause to adopt this rule without prior notice and comment, RFA analysis is not required. \n\nCosts of Compliance \n\n\n\tThe FAA estimates that this AD affects 0 engines installed on helicopters of U.S. registry. \n\tThe FAA estimates the following costs to comply with this AD: \n\n\n\tEstimated Costs ---------------------------------------------------------------------------------------------------------------- \n\tCost per Cost on U.S. \n\tActionLabor cost Parts cost product operators ---------------------------------------------------------------------------------------------------------------- Replace Stage 2 HPT disk.............. 50 work-hours x $85 per $30,000 $34,250 $0 \n\thour = $4,250. Replace Stage 3 turbine wheel......... 50 work-hours x $85 per 237,000 241,250 0 \n\thour = $4,250. ---------------------------------------------------------------------------------------------------------------- \n\n\n\tThe FAA has included all known costs in its cost estimate. According to the manufacturer, however, some of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected operators. \n\nAuthority for This Rulemaking \n\n\n\tTitle 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. ''Subtitle VII: Aviation Programs'' describes in more detail the scope of the Agency's authority. \n\tThe FAA is issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701: General requirements. Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. \n\nRegulatory Findings \n\n\n\tThis AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect 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. \n\tFor the reasons discussed above, I certify that this AD: \n\t(1) Is not a ''significant regulatory action'' under Executive Order 12866, and \n\t(2) Will not affect intrastate aviation in Alaska. \n\nList of Subjects in 14 CFR Part 39 \n\n\n\tAir transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. \n\n((Page 12809))