Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by Rolls-Royce plc) Turbofan Engines, 23929-23931 [2020-09017]

Download as PDF Federal Register / Vol. 85, No. 84 / Thursday, April 30, 2020 / Proposed Rules (iii) Use the service information and repetitive inspection thresholds required by paragraphs (g)(1)(iii), (2)(iii), and (3)(iii) to perform the inspections, as applicable. (5) After the effective date of this AD, within 5 engine FCs following a cabin depressurization event, perform the following inspections on both engines installed on the airplane: (i) Perform initial USIs and visual inspections required by paragraphs (g)(1), (2), and (3) of this AD. (ii) Thereafter, perform the repetitive USIs and visual inspections required by paragraphs (g)(1), (2), and (3) of this AD. (iii) Use the service information and repetitive inspection thresholds required by paragraphs (g)(1)(iii), (2)(iii), and (3)(iii) to perform the inspections, as applicable. (6) If any IPC stage 1 blade root (front face), IPC stage 2 blade root (front face), IPC shaft stage 2 dovetail post (front face), or IPC stage 2 blade root (rear face) is found cracked during any inspection required by this AD, replace the part with a part eligible for installation before further flight. (h) Terminating Action (Optional) Modification of an engine by installing the redesigned IPC stage 1 and stage 2 rotor blades, using RR SB Trent 1000 72–J941, Revision 1, dated February 6, 2019, or Initial Issue, dated December 6, 2018, is the terminating action for the initial and repetitive ultrasonic or visual inspection requirements, as applicable, of paragraph (g)(1) through (5) of this AD for that engine. (i) Definition For the purpose of this AD, an ‘‘asymmetric power condition’’ is the operation of the airplane at an altitude of less than 28,000 feet, experiencing either single engine take-off, engine fault (reduced power on one engine), or single engine IFSD, which includes execution of any non-normal checklist procedure. jbell on DSKJLSW7X2PROD with PROPOSALS (j) Credit for Previous Actions You may take credit for the initial inspections required by paragraphs (g)(1) through (5) of this AD if you performed these inspections before the effective date of this AD using any of the following. (1) RR Alert NMSB Trent 1000 72–AJ819, Revision 3, dated April 13, 2018, or earlier revisions; (2) RR NMSB Trent 1000 72–AJ814, Revision 4, dated September 28, 2018, or earlier revisions; (3) RR Alert NMSB Trent 1000 72–AK313, Initial Issue, dated May 2, 2019; or (4) RR Alert NMSB Trent 1000 72–AK092, Revision 3, dated February 28, 2019 or earlier revisions. (k) Special Flight Permit Special flight permits, as described in Section 21.197 and Section 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199), are subject to the requirements of paragraph (k)(1) of this AD. (1) Operators who are prohibited from further flight due to a crack finding as a result of paragraph (g) of this AD, may perform a one-time non-revenue ferry flight to a location where the engine can be VerDate Sep<11>2014 16:25 Apr 29, 2020 Jkt 250001 23929 removed from service. This ferry flight must be performed without passengers, involve non-ETOPS operation, and consume no more than three FCs. (2) [Reserved] DEPARTMENT OF TRANSPORTATION (l) Alternative Methods of Compliance (AMOCs) [Docket No. FAA–2020–0424; Project Identifier MCAI–2019–00130–E] (1) The Manager, ECO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (m)(1) of this AD. You may email your request to: ANE-ADAMOC@faa.gov. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/ certificate holding district office. RIN 2120–AA64 (m) Related Information (1) For more information about this AD, contact Stephen Elwin, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781–238– 7236; fax: 781–238–7199; email: Stephen.L.Elwin@faa.gov. (2) Refer to European Union Aviation Safety Agency (EASA) AD 2019–0250, dated October 9, 2019, for more information. You may examine the EASA AD in the AD docket on the internet at https:// www.regulations.gov by searching for and locating it in Docket No. FAA–2020–0009. (3) For service information identified in this AD, contact Rolls-Royce Deutschland Ltd. & Co KG, Eschenweg 11, 15827 Blankenfelde-Mahlow, Germany; phone: +49 (0) 33 708 6 0; email: https://www.rollsroyce.com/contact-us.aspx. You may view this referenced service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA, 01803. For information on the availability of this material at the FAA, call 781–238–7759. Issued on April 23, 2020. Gaetano A. Sciortino, Deputy Director for Strategic Initiatives, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2020–09009 Filed 4–29–20; 8:45 am] BILLING CODE 4910–13–P PO 00000 Frm 00007 Fmt 4702 Sfmt 4702 Federal Aviation Administration 14 CFR Part 39 Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by RollsRoyce plc) Turbofan Engines Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd & Co KG Trent 1000–A, Trent 1000–A2, Trent 1000–AE, Trent 1000–AE2, Trent 1000– C, Trent 1000–C2, Trent 1000–CE, Trent 1000–CE2, Trent 1000–D, Trent 1000– D2, Trent 1000–E, Trent 1000–E2, Trent 1000–G, Trent 1000–G2, Trent 1000–H, Trent 1000–H2, Trent 1000–J2, Trent 1000–K2, and Trent 1000–L2 model turbofan engines. This proposed AD was prompted by the manufacturer identifying 38 low-pressure compressor (LPC) front cases that have non-optimal properties that could inhibit their ability to contain certain engine failures. This proposed AD would require removing the LPC front case from service and replacing it with a part eligible for installation. The FAA is proposing this AD to address the unsafe condition on these products. DATES: The FAA must receive comments on this proposed AD by June 15, 2020. ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: • Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments. • Fax: 202 493 2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12 140, 1200 New Jersey Avenue SE, Washington, DC 20590. • Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this NPRM, contact Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, 15827 Blankenfelde-Mahlow, Germany; phone: +49 (0) 33 708 6 0; email: https://www.rolls-royce.com/ contact-us.aspx. You may view this E:\FR\FM\30APP1.SGM 30APP1 23930 Federal Register / Vol. 85, No. 84 / Thursday, April 30, 2020 / Proposed Rules service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call 781–238–7759. Examining the AD Docket You may examine the AD docket on the internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2020– 0424; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this NPRM, the mandatory continuing airworthiness information (MCAI), any comments received, and other information. The street address for Docket Operations is listed above. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Stephen Elwin, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781–238–7236; fax: 781–238–7199; email: stephen.l.elwin@faa.gov. SUPPLEMENTARY INFORMATION: Comments Invited The FAA invites you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under the ADDRESSES section. Include ‘‘Docket No. FAA–2020–0424; Project Identifier MCAI–2019–00130–E’’ at the beginning of your comments. The FAA specifically invites comments on the overall regulatory, economic, environmental, and energy aspects of this NPRM. The FAA will consider all comments received by the closing date and may amend this NPRM because of those comments. Except for Confidential Business Information 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 FAA will also post a report summarizing each substantive verbal contact received about this NPRM. Confidential Business Information Confidential Business Information (CBI) 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 NPRM 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 NPRM, 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 NPRM. Submissions containing CBI should be sent to Stephen Elwin, Aerospace 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. Discussion The European Union Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Community, has issued EASA AD 2019–0286, dated November 26, 2019 (referred to after this as ‘‘the MCAI’’), to address the unsafe condition on these products. The MCAI states: Engineering analysis has identified that 38 LPC front cases have non-optimal material properties. This could inhibit the intended function of the LPC front case to contain certain engine failures. This condition, if not corrected, could, in case of fan blade failure, lead to high energy debris release, possibly resulting in damage to, and reduced control of, the aeroplane. To address this potential unsafe condition, Rolls-Royce developed an updated life management and issued the NMSB, identifying those ESN that have an affected part installed, and providing the corresponding limit (date) for in-shop front fan case replacement. For the reason described above, this [EASA] AD requires removal from service of the affected engines to replace the affected parts. This [EASA] AD also prohibits re-installation of affected parts. You may obtain further information by examining the MCAI in the AD docket on the internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2020– 0424. Related Service Information Under 1 CFR Part 51 The FAA reviewed Rolls-Royce Alert Non-Modification Service Bulletin (NMSB) Trent 1000 72–AK294, dated July 16, 2019. The NMSB contains the serial numbers of the affected LPC front cases, the engine serial number on which these LPC front cases are installed, and the date to remove each engine from service. This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section. FAA’s Determination This 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 and service information referenced above. The FAA is proposing this AD because it evaluated all the relevant information provided by EASA and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design. Proposed AD Requirements This proposed AD would require removing the LPC front case from service and replacing it with a part eligible for installation. Costs of Compliance The FAA estimates that this proposed AD affects three engines installed on airplanes of U.S. registry. The FAA estimates the following costs to comply with this proposed AD: jbell on DSKJLSW7X2PROD with PROPOSALS ESTIMATED COSTS Action Labor cost Remove and replace the LPC front case ....... 390 work-hours × $85 per hour = $33,150 .... Authority for This Rulemaking Title 49 of the United States Code specifies the FAA’s authority to issue VerDate Sep<11>2014 16:25 Apr 29, 2020 Jkt 250001 Parts cost rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. Subtitle VII: PO 00000 Frm 00008 Fmt 4702 Sfmt 4702 $1,238,654 Cost per product $1,271,804 Cost on U.S. operators $3,815,412 Aviation Programs, describes in more detail the scope of the Agency’s authority. E:\FR\FM\30APP1.SGM 30APP1 Federal Register / Vol. 85, No. 84 / Thursday, April 30, 2020 / Proposed Rules The 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. Regulatory Findings The FAA determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would 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. For the reasons discussed above, I certify this proposed regulation: (1) Is not a ‘‘significant regulatory action’’ under Executive Order 12866, (2) Will not affect intrastate aviation in Alaska, and (3) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows: (c) Applicability This AD applies to all Rolls-Royce Deutschland Ltd & Co KG (Type Certificate previously held by Rolls-Royce plc) Trent 1000–A, Trent 1000–A2, Trent 1000–AE, Trent 1000–AE2, Trent 1000–C, Trent 1000– C2, Trent 1000–CE, Trent 1000–CE2, Trent 1000–D, Trent 1000–D2, Trent 1000–E, Trent 1000–E2, Trent 1000–G, Trent 1000–G2, Trent 1000–H, Trent 1000–H2, Trent 1000– J2, Trent 1000–K2, and Trent 1000–L2 model turbofan engines. (d) Subject Joint Aircraft System Component (JASC) Code 7230, Turbine Engine Compressor Section. (e) Unsafe Condition This AD was prompted by the manufacturer identifying 38 low-pressure compressor (LPC) front cases, part number (P/N) KH26266 with individual serial numbers (S/Ns), that have non-optimal properties that could inhibit their ability to contain certain engine failures. The FAA is issuing this AD to prevent failure of the LPC front case when subjected to high-energy debris release. The unsafe condition, if not addressed, could result in uncontained release of high-energy debris, damage to the engine, and damage to the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions After the effective date of this AD, no later than the required removal date specified in Appendix 1 of Rolls-Royce Alert NonModification Service Bulletin (NMSB) Trent 1000 72–AK294, dated July 16, 2019 (‘‘RollsRoyce Alert NMSB Trent 1000 72–AK294’’): (1) Remove LPC front case, P/N KH26266 and with a S/N identified in Appendix 1 of Rolls-Royce Alert NMSB Trent 1000 72– AK294, and (2) Replace the LPC front case with a part eligible for installation. Rolls-Royce Deutschland Ltd & Co KG (Type Certificate previously held by RollsRoyce plc): Docket No. FAA–2020–0424; Project Identifier MCAI–2019–00130–E. (h) Alternative Methods of Compliance (AMOCs) (1) The Manager, ECO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the ECO Branch, send it to the attention of the person identified in paragraph (i)(1) of this AD. You may email your request to: ANE-AD-AMOC@faa.gov. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/ certificate holding district office. (a) Comments Due Date The FAA must receive comments by June 15, 2020. (i) Related Information (1) For more information about this AD, contact Stephen Elwin, Aerospace Engineer, PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: ■ Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD): ■ jbell on DSKJLSW7X2PROD with PROPOSALS (b) Affected ADs None. VerDate Sep<11>2014 16:25 Apr 29, 2020 Jkt 250001 PO 00000 Frm 00009 Fmt 4702 Sfmt 4702 23931 ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781–238– 7236; fax: 781–238–7199; email: stephen.l.elwin@faa.gov. (2) Refer to European Union Aviation Safety Agency (EASA) AD 2019–0286, dated November 26, 2019, for more information. You may examine the EASA AD in the AD docket on the internet at https:// www.regulations.gov by searching for and locating it in Docket No. FAA–2020–0424. (3) For service information identified in this AD, contact Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, 15827 BlankenfeldeMahlow, Germany; phone: +49 (0) 33 708 6 0; email: https://www.rolls-royce.com/ contact-us.aspx. You may view this referenced service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call 781–238–7759. Issued on April 23, 2020. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2020–09017 Filed 4–29–20; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 71 [Docket No. FAA–2020–0359; Airspace Docket No. 15–AAL–5] Establishment of Class E Airspace; Sleetmute AK Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: SUMMARY: This action proposes to establish Class E airspace extending upward from 700 feet above the surface at Sleetmute Airport, Sleetmute AK, to accommodate new area navigation (RNAV) procedures at the airport. This action would ensure the safety and management of instrument flight rules (IFR) operations within the National Airspace System. DATES: Comments must be received on or before June 15, 2020. ADDRESSES: Send comments on this proposal to the U.S. Department of Transportation, Docket Operations, 1200 New Jersey Avenue SE, West Building Ground Floor, Room W12–140, Washington, DC 20590; telephone: 1– 800–647–5527, or (202) 366–9826. You must identify FAA Docket No. FAA– 2020–0359; Airspace Docket No. 15– AAL–5, at the beginning of your comments. You may also submit E:\FR\FM\30APP1.SGM 30APP1

Agencies

[Federal Register Volume 85, Number 84 (Thursday, April 30, 2020)]
[Proposed Rules]
[Pages 23929-23931]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-09017]


-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2020-0424; Project Identifier MCAI-2019-00130-E]
RIN 2120-AA64


Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG 
(Type Certificate Previously Held by Rolls-Royce plc) Turbofan Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) 
for all Rolls-Royce Deutschland Ltd & Co KG Trent 1000-A, Trent 1000-
A2, Trent 1000-AE, Trent 1000-AE2, Trent 1000-C, Trent 1000-C2, Trent 
1000-CE, Trent 1000-CE2, Trent 1000-D, Trent 1000-D2, Trent 1000-E, 
Trent 1000-E2, Trent 1000-G, Trent 1000-G2, Trent 1000-H, Trent 1000-
H2, Trent 1000-J2, Trent 1000-K2, and Trent 1000-L2 model turbofan 
engines. This proposed AD was prompted by the manufacturer identifying 
38 low-pressure compressor (LPC) front cases that have non-optimal 
properties that could inhibit their ability to contain certain engine 
failures. This proposed AD would require removing the LPC front case 
from service and replacing it with a part eligible for installation. 
The FAA is proposing this AD to address the unsafe condition on these 
products.

DATES: The FAA must receive comments on this proposed AD by June 15, 
2020.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202 493 2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12 140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    For service information identified in this NPRM, contact Rolls-
Royce Deutschland Ltd & Co KG, Eschenweg 11, 15827 Blankenfelde-Mahlow, 
Germany; phone: +49 (0) 33 708 6 0; email: https://www.rolls-royce.com/contact-us.aspx. You may view this

[[Page 23930]]

service information at the FAA, Airworthiness Products Section, 
Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. 
For information on the availability of this material at the FAA, call 
781-238-7759.

Examining the AD Docket

    You may examine the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2020-
0424; or in person at Docket Operations between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays. The AD docket contains 
this NPRM, the mandatory continuing airworthiness information (MCAI), 
any comments received, and other information. The street address for 
Docket Operations is listed above. Comments will be available in the AD 
docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Stephen Elwin, Aerospace Engineer, ECO 
Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781-
238-7236; fax: 781-238-7199; email: [email protected].

SUPPLEMENTARY INFORMATION: 

Comments Invited

    The FAA invites you to send any written relevant data, views, or 
arguments about this proposal. Send your comments to an address listed 
under the ADDRESSES section. Include ``Docket No. FAA-2020-0424; 
Project Identifier MCAI-2019-00130-E'' at the beginning of your 
comments. The FAA specifically invites comments on the overall 
regulatory, economic, environmental, and energy aspects of this NPRM. 
The FAA will consider all comments received by the closing date and may 
amend this NPRM because of those comments.
    Except for Confidential Business Information 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 FAA will also post a report summarizing each substantive 
verbal contact received about this NPRM.

Confidential Business Information

    Confidential Business Information (CBI) 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 NPRM 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 NPRM, 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 NPRM. Submissions containing 
CBI should be sent to Stephen Elwin, Aerospace 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.

Discussion

    The European Union Aviation Safety Agency (EASA), which is the 
Technical Agent for the Member States of the European Community, has 
issued EASA AD 2019-0286, dated November 26, 2019 (referred to after 
this as ``the MCAI''), to address the unsafe condition on these 
products. The MCAI states:

    Engineering analysis has identified that 38 LPC front cases have 
non-optimal material properties. This could inhibit the intended 
function of the LPC front case to contain certain engine failures. 
This condition, if not corrected, could, in case of fan blade 
failure, lead to high energy debris release, possibly resulting in 
damage to, and reduced control of, the aeroplane.
    To address this potential unsafe condition, Rolls-Royce 
developed an updated life management and issued the NMSB, 
identifying those ESN that have an affected part installed, and 
providing the corresponding limit (date) for in-shop front fan case 
replacement. For the reason described above, this [EASA] AD requires 
removal from service of the affected engines to replace the affected 
parts. This [EASA] AD also prohibits re-installation of affected 
parts.

    You may obtain further information by examining the MCAI in the AD 
docket on the internet at https://www.regulations.gov by searching for 
and locating Docket No. FAA-2020-0424.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed Rolls-Royce Alert Non-Modification Service 
Bulletin (NMSB) Trent 1000 72-AK294, dated July 16, 2019. The NMSB 
contains the serial numbers of the affected LPC front cases, the engine 
serial number on which these LPC front cases are installed, and the 
date to remove each engine from service. This service information is 
reasonably available because the interested parties have access to it 
through their normal course of business or by the means identified in 
the ADDRESSES section.

FAA's Determination

    This 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 and service information referenced 
above. The FAA is proposing this AD because it evaluated all the 
relevant information provided by EASA and determined the unsafe 
condition described previously is likely to exist or develop in other 
products of the same type design.

Proposed AD Requirements

    This proposed AD would require removing the LPC front case from 
service and replacing it with a part eligible for installation.

Costs of Compliance

    The FAA estimates that this proposed AD affects three engines 
installed on airplanes of U.S. registry.
    The FAA estimates the following costs to comply with this proposed 
AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
----------------------------------------------------------------------------------------------------------------
Remove and replace the LPC front case.  390 work-hours x $85 per      $1,238,654      $1,271,804      $3,815,412
                                         hour = $33,150.
----------------------------------------------------------------------------------------------------------------

Authority for This Rulemaking

    Title 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.

[[Page 23931]]

    The 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.

Regulatory Findings

    The FAA determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would 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.
    For the reasons discussed above, I certify this proposed 
regulation:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Will not affect intrastate aviation in Alaska, and
    (3) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority:  49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13   [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive (AD):

Rolls-Royce Deutschland Ltd & Co KG (Type Certificate previously 
held by Rolls-Royce plc): Docket No. FAA-2020-0424; Project 
Identifier MCAI-2019-00130-E.

(a) Comments Due Date

    The FAA must receive comments by June 15, 2020.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to all Rolls-Royce Deutschland Ltd & Co KG (Type 
Certificate previously held by Rolls-Royce plc) Trent 1000-A, Trent 
1000-A2, Trent 1000-AE, Trent 1000-AE2, Trent 1000-C, Trent 1000-C2, 
Trent 1000-CE, Trent 1000-CE2, Trent 1000-D, Trent 1000-D2, Trent 
1000-E, Trent 1000-E2, Trent 1000-G, Trent 1000-G2, Trent 1000-H, 
Trent 1000-H2, Trent 1000-J2, Trent 1000-K2, and Trent 1000-L2 model 
turbofan engines.

(d) Subject

    Joint Aircraft System Component (JASC) Code 7230, Turbine Engine 
Compressor Section.

(e) Unsafe Condition

    This AD was prompted by the manufacturer identifying 38 low-
pressure compressor (LPC) front cases, part number (P/N) KH26266 
with individual serial numbers (S/Ns), that have non-optimal 
properties that could inhibit their ability to contain certain 
engine failures. The FAA is issuing this AD to prevent failure of 
the LPC front case when subjected to high-energy debris release. The 
unsafe condition, if not addressed, could result in uncontained 
release of high-energy debris, damage to the engine, and damage to 
the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Required Actions

    After the effective date of this AD, no later than the required 
removal date specified in Appendix 1 of Rolls-Royce Alert Non-
Modification Service Bulletin (NMSB) Trent 1000 72-AK294, dated July 
16, 2019 (``Rolls-Royce Alert NMSB Trent 1000 72-AK294''):
    (1) Remove LPC front case, P/N KH26266 and with a S/N identified 
in Appendix 1 of Rolls-Royce Alert NMSB Trent 1000 72-AK294, and
    (2) Replace the LPC front case with a part eligible for 
installation.

(h) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, ECO Branch, FAA, has the authority to approve 
AMOCs for this AD, if requested using the procedures found in 14 CFR 
39.19. In accordance with 14 CFR 39.19, send your request to your 
principal inspector or local Flight Standards District Office, as 
appropriate. If sending information directly to the manager of the 
ECO Branch, send it to the attention of the person identified in 
paragraph (i)(1) of this AD. You may email your request to: [email protected].
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the local flight standards district office/certificate holding 
district office.

(i) Related Information

    (1) For more information about this AD, contact Stephen Elwin, 
Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, 
Burlington, MA 01803; phone: 781-238-7236; fax: 781-238-7199; email: 
[email protected].
    (2) Refer to European Union Aviation Safety Agency (EASA) AD 
2019-0286, dated November 26, 2019, for more information. You may 
examine the EASA AD in the AD docket on the internet at https://www.regulations.gov by searching for and locating it in Docket No. 
FAA-2020-0424.
    (3) For service information identified in this AD, contact 
Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, 15827 
Blankenfelde-Mahlow, Germany; phone: +49 (0) 33 708 6 0; email: 
https://www.rolls-royce.com/contact-us.aspx. You may view this 
referenced service information at the FAA, Airworthiness Products 
Section, Operational Safety Branch, 1200 District Avenue, 
Burlington, MA 01803. For information on the availability of this 
material at the FAA, call 781-238-7759.

    Issued on April 23, 2020.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2020-09017 Filed 4-29-20; 8:45 am]
 BILLING CODE 4910-13-P

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