Rules and Regulations Federal Register Vol

129

Rules and Regulations Federal Register Vol. 84, No. 13

Friday, January 18, 2019

This section of the FEDERAL REGISTER • Federal eRulemaking Portal: Go to We determined that the resultant contains regulatory documents having general http://www.regulations.gov. Follow the blade vibration can result in cumulative applicability and legal effect, most of which instructions for submitting comments. fatigue damage that can cause blade are keyed to and codified in the Code of • Fax: 202–493–2251. failure and consequent engine in-flight Federal Regulations, which is published under • shutdown. In the event of a single 50 titles pursuant to 44 U.S.C. 1510. Mail: U.S. Department of Transportation, Docket Operations, M– engine in-flight shutdown during the The Code of Federal Regulations is sold by 30, West Building Ground Floor, Room cruise phase of flight, thrust on the the Superintendent of Documents. W12–140, 1200 New Jersey Avenue SE, remaining engine is normally increased Washington, DC 20590. to maximum continuous thrust (MCT). • Hand Delivery: Deliver to Mail During a diversion following a single DEPARTMENT OF TRANSPORTATION address above between 9 a.m. and 5 engine shutdown under an ETOPS flight, the remaining engine may operate Federal Aviation Administration p.m., Monday through Friday, except Federal holidays. at MCT for a prolonged period, during which the IPC stage 2 blades would be 14 CFR Part 39 Examining the AD Docket exposed to the resonant frequency [Docket No. FAA–2018–1066; Product You may examine the AD docket on condition. Therefore, an ETOPS Identifier 2018–NM–176–AD; Amendment the internet at http:// diversion will put the remaining engine 39–19540; AD 2019–01–01] www.regulations.gov by searching for at an operating condition that would RIN 2120–AA64 and locating Docket No. FAA–2018– significantly increase the likelihood of 1066; or in person at Docket Operations failure of the remaining engine. In Airworthiness Directives; The Boeing between 9 a.m. and 5 p.m., Monday addition, if the remaining engine Company Airplanes through Friday, except Federal holidays. already had cracked IPC stage 2 blades, The AD docket contains this final rule, the likelihood of the remaining engine AGENCY: Federal Aviation failing before a diversion can be safely Administration (FAA), DOT. the regulatory evaluation, any comments received, and other completed will further increase. ACTION: Final rule; request for information. The street address for The issue associated with IPC blade comments. Docket Operations (phone: 800–647– vibration due to a resonant frequency as 5527) is in the ADDRESSES section. described above was determined to exist SUMMARY: We are adopting a new on Boeing Model 787–8 airplanes airworthiness directive (AD) for The Comments will be available in the AD docket shortly after receipt. powered by RR Trent 1000 Package B Boeing Company Model 787–8 airplanes engines. The Package B engines are RR FOR FURTHER INFORMATION CONTACT: powered by Rolls-Royce plc (RR) Trent Trent 1000–A (including –A/01 and –A/ Rebel Nichols, Aerospace Engineer, 1000–A (including –A/01 and –A/01A), 01A), Trent 1000–AE (including –AE/ Propulsion Section, FAA, Seattle ACO Trent 1000–AE (including –AE/01A), 01A), Trent 1000–C (including –C/01 Branch, 2200 South 216th St., Des Trent 1000–C (including –C/01 and –C/ and –C/01A), Trent 1000–CE (including Moines, WA 98198; phone and fax: 206– 01A), Trent 1000–CE (including –CE/ –CE/01A), Trent 1000–D (including –D/ 231–3556; email: Rebel.Nichols@ 01A), Trent 1000–D (including –D/01 01 and –D/01A), Trent 1000–E faa.gov. and –D/01A), Trent 1000–E (including (including –E/01 and –E/01A), Trent –E/01 and –E/01A), Trent 1000–G SUPPLEMENTARY INFORMATION: 1000–G (including –G/01 and –G/01A), (including –G/01 and –G/01A), and and Trent 1000–H (including –H/01 and Discussion Trent 1000–H (including –H/01 and H/ H/01A) turbofan engines. The engine 01A) turbofan engines. This AD requires We issued AD 2018–09–05, manufacturer assessed available data revising the airplane flight manual Amendment 39–19261 (83 FR 18208, and determined that the IPC blade (AFM) to limit extended operations April 26, 2018) (‘‘AD 2018–09–05’’), to vibration due to a resonant frequency (ETOPS). This AD was prompted by a address an unsafe condition identified for the Package B engines is less severe report from the engine manufacturer on Boeing Model 787–8 and 787–9 than that for the Package C engines, but indicating that after an engine failure, airplanes powered by RR Trent 1000 it is still an unsafe condition that must prolonged operation at high thrust Package C engines. The Package C be addressed by AD action on Boeing settings on the remaining engine during engines are RR Trent 1000–A2, Trent Model 787–8 airplanes powered by the an ETOPS diversion may result in 1000–AE2, Trent 1000–C2, Trent 1000– RR Trent 1000 Package B engines during failure of the remaining engine before CE2, Trent 1000–D2, Trent 1000–E2, an ETOPS diversion. the diversion can be safely completed. Trent 1000–G2, Trent 1000–H2, Trent The Package B engines have been We are issuing this AD to address the 1000–J2, Trent 1000–K2, and Trent certified for installation on Boeing unsafe condition on these products. 1000–L2 turbofan engines. AD 2018–09– Model 787–8 airplanes. Furthermore, DATES: This AD is effective February 4, 05 was prompted by a report from the Boeing Model 787–8 airplanes have 2019. engine manufacturer that intermediate been certified for intermixed engine We must receive comments on this pressure compressor (IPC) stage 2 blades installation, where a Package B engine AD by March 4, 2019. have a resonant frequency that is is installed with a Package C or a Trent ADDRESSES: You may send comments, excited by the airflow conditions 1000–TEN engine, for certain thrust using the procedures found in 14 CFR existing in the engine during operation ratings. The RR Trent 1000–TEN 11.43 and 11.45, by any of the following at high thrust settings under certain engines have a numeral ‘‘3’’ at the end methods: temperature and altitude conditions. of the model number (e.g., Trent 1000–

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AE3). When a 787–8 airplane has an FAA’s Justification and Determination opportunity for public comment. intermix engine configuration where a of the Effective Date However, we invite you to send any Package B engine is installed with a An unsafe condition exists that written data, views, or arguments about non-Package B engine, ETOPS requires the immediate adoption of this this final rule. Send your comments to limitations associated with the non- AD without providing an opportunity an address listed under the ADDRESSES Package B engine also apply. In this for public comments prior to adoption. section. Include the docket number case, the airplane must be operated in The FAA has found that the risk to the FAA–2018–1066 and Product Identifier a manner that satisfies all applicable flying public justifies waiving notice 2018–NM–176–AD at the beginning of ETOPS limitations. and comment prior to adoption of this your comments. We specifically invite comments on the overall regulatory, FAA’s Determination rule because after an engine failure, prolonged operation at high thrust economic, environmental, and energy We are issuing this AD because we settings on the remaining engine during aspects of this final rule. We will evaluated all the relevant information an ETOPS diversion may result in consider all comments received by the and determined the unsafe condition failure of the remaining engine before closing date and may amend this final described previously is likely to exist or the diversion can be safely completed; rule because of those comments. develop in other products of the same unrecoverable thrust loss on both We will post all comments we type design. engines could lead to a forced landing. receive, without change, to http:// Additionally, there are currently no AD Requirements www.regulations.gov, including any domestic operators of this product. We personal information you provide. We find good cause that notice and This AD requires revising the AFM to will also post a report summarizing each opportunity for prior public comment limit ETOPS. substantive verbal contact we receive are impracticable and unnecessary. In about this final rule. Interim Action addition, for the reasons stated above, we find that good cause exists for Costs of Compliance This AD is interim action. The making this amendment effective in less manufacturer is currently developing a than 30 days. Currently, there are no affected U.S.- modification that will address the registered airplanes. If an affected unsafe condition identified in this AD. Comments Invited airplane is imported and placed on the Once this modification is developed, This AD is a final rule that involves U.S. Register in the future, we provide approved, and available, we might requirements affecting flight safety and the following cost estimates to comply consider additional rulemaking. was not preceded by notice and an with this AD:

ESTIMATED COSTS

Cost per Action Labor cost Parts cost product

AFM revisions ...... 1 work-hour × $85 per hour = $85 ...... $0 $85

Authority for This Rulemaking In accordance with that order, issuance (3) Will not affect intrastate aviation of ADs is normally a function of the in Alaska, and Title 49 of the United States Code Compliance and Airworthiness specifies the FAA’s authority to issue (4) Will not have a significant Division, but during this transition rules on aviation safety. Subtitle I, economic impact, positive or negative, period, the Executive Director has section 106, describes the authority of on a substantial number of small entities delegated the authority to issue ADs the FAA Administrator. ‘‘Subtitle VII: under the criteria of the Regulatory applicable to transport category Aviation Programs’’ describes in more Flexibility Act. airplanes and associated appliances to detail the scope of the Agency’s the Director of the System Oversight authority. List of Subjects in 14 CFR Part 39 Division. We are issuing this rulemaking under Air transportation, Aircraft, Aviation the authority described in Subtitle VII, Regulatory Findings safety, Incorporation by reference, Part A, Subpart III, Section 44701: This AD will not have federalism Safety. ‘‘General requirements.’’ Under that implications under Executive Order section, Congress charges the FAA with Adoption of the Amendment 13132. This AD will not have a promoting safe flight of civil aircraft in substantial direct effect on the States, on Accordingly, under the authority air commerce by prescribing regulations the relationship between the national for practices, methods, and procedures delegated to me by the Administrator, government and the States, or on the the Administrator finds necessary for the FAA amends 14 CFR part 39 as distribution of power and safety in air commerce. This regulation follows: responsibilities among the various is within the scope of that authority levels of government. PART 39—AIRWORTHINESS because it addresses an unsafe condition DIRECTIVES that is likely to exist or develop on For the reasons discussed above, I products identified in this rulemaking certify that this AD: action. (1) Is not a ‘‘significant regulatory ■ 1. The authority citation for part 39 This AD is issued in accordance with action’’ under Executive Order 12866, continues to read as follows: authority delegated by the Executive (2) Is not a ‘‘significant rule’’ under Authority: 49 U.S.C. 106(g), 40113, 44701. Director, Aircraft Certification Service, DOT Regulatory Policies and Procedures as authorized by FAA Order 8000.51C. (44 FR 11034, February 26, 1979),

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§ 39.13 [Amended] G (including –G/01 and –G/01A), and Trent (g) Revision of Limitations Chapter in ■ 2. The FAA amends § 39.13 by adding 1000–H (including –H/01 and H/01A) Airplane Flight Manual (AFM) the following new airworthiness turbofan engines. Within 7 days after the effective date of directive (AD): (d) Subject this AD, revise the Certificate Limitations chapter of the applicable Boeing AFM Engine 2019–01–01 The Boeing Company: Air Transport Association (ATA) of Appendix by incorporating the information Amendment 39–19540; Docket No. America Code 71, Power plant. in figure 1 to paragraph (g) of this AD. This FAA–2018–1066; Product Identifier may be accomplished by inserting a copy of 2018–NM–176–AD. (e) Unsafe Condition this AD into the AFM. When information This AD was prompted by a report from (a) Effective Date identical to that in figure 1 to paragraph (g) the engine manufacturer indicating that after of this AD has been included in the This AD is effective February 4, 2019. an engine failure, prolonged operation at Certificate Limitations chapter of the general high thrust settings on the remaining engine (b) Affected ADs revisions of the AFM, the general revisions during an extended-operation (ETOPS) None. may be inserted into the AFM, and the copy diversion may result in failure of the of this AD may be removed from the AFM. (c) Applicability remaining engine before the diversion can be safely completed. We are issuing this AD to Note 1 to paragraph (g) of this AD: The This AD applies to The Boeing Company Boeing AFM for the aircraft affected by this Model 787–8 airplanes, certificated in any address unrecoverable thrust loss on both engines, which could lead to a forced AD is required to be furnished with the category, powered by Rolls-Royce plc (RR) aircraft, per 14 CFR 25.1581. Further, Trent 1000–A (including –A/01 and –A/01A), landing. operators of the aircraft affected by this AD Trent 1000–AE (including –AE/01A), Trent (f) Compliance must operate in accordance with the 1000–C (including –C/01 and –C/01A), Trent 1000–CE (including –CE/01A), Trent 1000–D Comply with this AD within the limitations specified in the AFM, per 14 CFR (including –D/01 and –D/01A), Trent 1000– compliance times specified, unless already 91.9. E (including –E/01 and –E/01A), Trent 1000– done. BILLING CODE 4910–13–P

BILLING CODE 4910–13–C 14 CFR 39.19, send your request to your (2) Before using any approved AMOC, (h) Alternative Methods of Compliance principal inspector or local Flight Standards notify your appropriate principal inspector, (AMOCs) District Office, as appropriate. If sending or lacking a principal inspector, the manager information directly to the manager of the of the local flight standards district office/ (1) The Manager, Seattle ACO Branch, certification office, send it to the attention of certificate holding district office. FAA, has the authority to approve AMOCs the person identified in paragraph (i) of this (3) An AMOC that provides an acceptable for this AD, if requested using the procedures AD. Information may be emailed to: 9-ANM- level of safety may be used for any repair, found in 14 CFR 39.19. In accordance with [email protected]. modification, or alteration required by this

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AD if it is approved by the Boeing (i) Related Information Issued in Des Moines, Washington, on Commercial Airplanes Organization For more information about this AD, January 11, 2019. Designation Authorization (ODA) that has contact Rebel Nichols, Aerospace Engineer, Jeffrey E. Duven, been authorized by the Manager, Seattle ACO Propulsion Section, FAA, Seattle ACO Director, System Oversight Division, Aircraft Branch, to make those findings. To be Branch, 2200 South 216th St., Des Moines, Certification Service. approved, the repair method, modification WA 98198; phone and fax: 206–231–3556; [FR Doc. 2019–00078 Filed 1–17–19; 8:45 am] deviation, or alteration deviation must meet email: [email protected]. BILLING CODE 4910–13–P the certification basis of the airplane, and the (j) Material Incorporated by Reference approval must specifically refer to this AD. None.

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