Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes, 20097-20100 [2021-07201]

Download as PDF Federal Register / Vol. 86, No. 72 / Friday, April 16, 2021 / Proposed Rules 20097 Figure 2 to Paragraph (g)(2) - Dispatch Restriction for EICAS MESSAGE ENG EEC Cl for GEnx-2B Dispatch of an airplane is prohibited if the engine indicating and crew alerting system (EICAS) displays the status message "ENG X EEC Cl" (where "X'' is engine position: "1," "2," "3," or "4") and any of the following conditions exist: i. None of the maintenance messages in the Central Maintenance Computer (CMC) correlate with "ENG X EEC Cl" status message; or ii. The following maintenance message fault codes combination exists in the CMC for either channel A or B (where "X'' is engine position: "1," "2," "3," or "4"). Fault Combination Description Corresponding Fault Codes Combination {TLA out of range fault} {78X13 (CH-A)} AND AND {7X132 OR 7X144 OR 7X130 OR 7X145} {FMV/FSV disagree fault OR FMV/FSV out of range fault (on the same channel as TLA out of range fault)} AND jbell on DSKJLSW7X2PROD with PROPOSALS (h) Definition For the purposes of this AD, an approved overhaul procedure is one of the following: (i) Replacement of the EEC MN4 microprocessor using FADEC Internationalapproved maintenance procedures; or (ii) Replacement of the EEC MN4 microprocessor using the Accomplishment Instructions, paragraph 3., as applicable, of GEnx–1B Service Bulletin (SB) 73–0097 R00, dated December 17, 2020, or R01, dated January 29, 2021; or GEnx–2B SB 73–0090 R00, dated December 17, 2020, or R01, dated January 28, 2021. (i) Installation Prohibition After the effective date of this AD, do not install onto any engine an EEC with a main channel board that was subject to more than three replacements of the EEC MN4 microprocessor. (j) 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 VerDate Sep<11>2014 16:09 Apr 15, 2021 Jkt 253001 {7X132 OR 7X144 OR 7X133 OR 7X146} 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 Related Information. Information may be emailed 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. Issued on April 7, 2021. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. (k) Related Information [Docket No. FAA–2021–0269; Project Identifier MCAI–2020–01417–T] (1) For more information about this AD, contact Mehdi Lamnyi, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238–7743; fax: (781) 238–7199; email: Mehdi.Lamnyi@faa.gov. (2) For service information identified in this AD, contact General Electric Company, 1 Neumann Way, Cincinnati, OH 45215; phone: (513) 552–3272; email: aviation.fleetsupport@ae.ge.com; website: www.ge.com. 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. PO 00000 Frm 00061 Fmt 4702 Sfmt 4702 [FR Doc. 2021–07550 Filed 4–15–21; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 RIN 2120–AA64 Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus Canada Limited Partnership Model BD–500–1A10 and SUMMARY: E:\FR\FM\16APP1.SGM 16APP1 EP16AP21.001</GPH> (3) For all affected engines, before the EEC reaches 11,000 cycles since new, replace the EEC MN4 microprocessor using an approved overhaul procedure. (i) Thereafter, replace the EEC MN4 microprocessor before accumulating 11,000 cycles since the last replacement. (ii) [Reserved] {78X14 (CH-B)} jbell on DSKJLSW7X2PROD with PROPOSALS 20098 Federal Register / Vol. 86, No. 72 / Friday, April 16, 2021 / Proposed Rules BD–500–1A11 airplanes. This proposed AD was prompted by reports of in-flight engine shutdowns (IFESs); investigation results indicated that this could be caused by high altitude climbs at higher thrust settings on engines with certain thrust ratings. This proposed AD would require amending the existing airplane flight manual (AFM) to incorporate a new limitation and revise certain normal procedures, as specified in a Transport Canada Civil Aviation (TCCA) AD, which is proposed for incorporation by reference. 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 1, 2021. 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 TCCA material that will be incorporated by reference (IBR) in this AD, contact the TCCA, Transport Canada National Aircraft Certification, 159 Cleopatra Drive, Nepean, Ontario, K1A 0N5, CANADA; telephone 888– 663–3639; email AD-CN@tc.gc.ca; internet https://tc.canada.ca/en/ aviation. For Airbus material that will be IBR in this AD, contact Airbus Canada Limited Partnership, 13100 Henri-Fabre Boulevard, Mirabel, Que´bec J7N 3C6, Canada; telephone 450–476– 7676; email a220_crc@abc.airbus; internet http://a220world.airbus.com. You may view this IBR material at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. It is also available in the AD docket on the internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2021– 0269. 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–2021– 0269; or in person at Docket Operations VerDate Sep<11>2014 16:09 Apr 15, 2021 Jkt 253001 between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this NPRM, any comments received, and other information. The street address for Docket Operations is listed above. FOR FURTHER INFORMATION CONTACT: Thomas Niczky, Aerospace Engineer, Avionics and Electrical Systems Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516– 228–7347; fax 516–794–5531; email 9avs-nyaco-cos@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 ADDRESSES. Include ‘‘Docket No. FAA–2021–0269; Project Identifier MCAI–2020–01417–T’’ at the beginning of your comments. The most helpful comments reference a specific portion of the proposal, 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 the proposal because of those comments. Except 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 proposed AD. 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 Thomas Niczky, Aerospace Engineer, Avionics and PO 00000 Frm 00062 Fmt 4702 Sfmt 4702 Electrical Systems Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516–228–7347; fax 516–794–5531; email 9-avs-nyaco-cos@ faa.gov. Any commentary that the FAA receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking. Background TCCA, which is the aviation authority for Canada, has issued TCCA AD CF– 2020–41, issued October 15, 2020 (TCCA AD CF–2020–41) (also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI), to correct an unsafe condition for certain Airbus Canada Limited Partnership Model BD–500–1A10 and BD–500–1A11 airplanes. This proposed AD was prompted by reports of IFESs; investigations are ongoing to determine the root cause. Investigation results indicated that an IFES could be caused by high altitude climbs at higher thrust settings on engines with certain thrust ratings. The FAA is proposing this AD to provide the flightcrew with information and procedures for operation above 29,000 feet to prevent uncontained failure of an engine during an IFES, which could result in structural damage and reduced structural integrity of the airplane. See the MCAI for additional background information. Related Service Information Under 1 CFR Part 51 TCCA AD CF–2020–41 specifies procedures for amending the applicable AFM to incorporate a new limitation and revise the normal procedures to limit the engine N1 setting for flights above 29,000 feet. Airbus Canada Limited Partnership has issued Supplement 21—Operation Above 29000 Feet, of Airbus A220–100 Airplane Flight Manual, Publication BD500–3AB48–22200–00, Issue 016, dated October 16, 2020. This supplement specifies limitations, information, and procedures for operation above 29,000 feet. This material 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 and Requirements of This Proposed AD This product has been approved by the aviation authority of another country, and is approved for operation in the United States. Pursuant to the FAA’s bilateral agreement with the State of Design Authority, the FAA has been E:\FR\FM\16APP1.SGM 16APP1 Federal Register / Vol. 86, No. 72 / Friday, April 16, 2021 / Proposed Rules notified of the unsafe condition described in the MCAI referenced above. The FAA is proposing this AD because the FAA evaluated all the relevant information 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 accomplishing the actions specified in TCCA AD CF–2020–41 described previously, as incorporated by reference, except as specified under ‘‘Differences Between this Proposed AD and the MCAI’’ in this NPRM, and except for any differences identified as exceptions in the regulatory text of this AD. Differences Between This Proposed AD and the MCAI The MCAI requires a borescope inspection for signs of damage of the 1st stage axial low-pressure compressor (LPC) rotor of each engine, and allows for the optional installation of health management unit reports to monitor N1 exceedances. This proposed AD does not include either provision. The MCAI also requires amending the AFM by ‘‘incorporating the Supplement 21 Operation above 29000 feet from AFM Revision 15–A dated 10 September 2020.’’ Since the MCAI was issued, Supplement 21 was revised. This proposed AD would require the incorporation of Supplement 21— Operation Above 29000 Feet, of Airbus A220–100 Airplane Flight Manual, Publication BD500–3AB48–22200–00, Issue 016, dated October 16, 2020. The MCAI requires operators to ‘‘inform all flight crews’’ of revisions to the AFM, and thereafter to ‘‘operate the aeroplane accordingly.’’ However, this proposed AD would not specifically require those actions as those actions are already required by FAA regulations. FAA regulations require operators furnish to pilots any changes to the AFM (ex: 14 CFR 121.137, and to ensure the pilots are familiar with the AFM (ex: 14 CFR 91.505). As with any other training requirement, training on the updated AFM content is tracked by the operators and recorded in each pilot’s training record, which is available for the FAA to review. FAA regulations also require pilots to follow the procedures in the existing AFM including all updates. 14 CFR 91.9 requires that no person may operate a civil aircraft without complying with the operating limitations specified in the AFM. Therefore, including a requirement in this proposed AD to operate the airplane according to the revised AFM would be redundant and unnecessary. Further, compliance with such a requirement in an AD would be impracticable to demonstrate or track on an ongoing basis; therefore, a requirement to operate the airplane in such a manner would be unenforceable. These differences have been coordinated with TCCA. 20099 Explanation of Required Compliance Information In the FAA’s ongoing efforts to improve the efficiency of the AD process, the FAA initially worked with Airbus and EASA to develop a process to use certain EASA ADs as the primary source of information for compliance with requirements for corresponding FAA ADs. The FAA has since coordinated with other manufacturers and civil aviation authorities (CAAs) to use this process. As a result, TCCA AD CF–2020–41 will be incorporated by reference in the FAA final rule. This proposed AD would, therefore, require compliance with TCCA AD CF–2020–41 in its entirety, through that incorporation, except for any differences identified as exceptions in the regulatory text of this proposed AD. Service information specified in TCCA AD CF–2020–41 that is required for compliance with TCCA AD CF–2020–41 will be available on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA–2021–0269 after the FAA final rule is published. Interim Action The FAA considers this proposed AD interim action. If final action is later identified, the FAA might consider further rulemaking then. Costs of Compliance The FAA estimates that this proposed AD affects 42 airplanes of U.S. registry. The FAA estimates the following costs to comply with this proposed AD: ESTIMATED COSTS FOR REQUIRED ACTIONS Labor cost Parts cost Cost per product Cost on U.S. operators 1 work-hour × $85 per hour = $85 .............................................................................................. $0 $85 $3,570 jbell on DSKJLSW7X2PROD with PROPOSALS 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. 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 VerDate Sep<11>2014 16:09 Apr 15, 2021 Jkt 253001 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. PO 00000 Frm 00063 Fmt 4702 Sfmt 4702 For the reasons discussed above, I certify this proposed regulation: (1) Is not a ‘‘significant regulatory action’’ under Executive Order 12866, (2) Would not affect intrastate aviation in Alaska, and (3) Would 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. E:\FR\FM\16APP1.SGM 16APP1 20100 Federal Register / Vol. 86, No. 72 / Friday, April 16, 2021 / Proposed Rules 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 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: ■ Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.): Docket No. FAA– 2021–0269; Project Identifier MCAI– 2020–01417–T. (a) Comments Due Date The FAA must receive comments by June 1, 2021. (b) Affected Airworthiness Directives (ADs) None. (c) Applicability This AD applies to Airbus Canada Limited Partnership (type certificate previously held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Model BD–500– 1A10 and BD–500–1A11 airplanes, certificated in any category, as identified in Transport Canada Civil Aviation (TCCA) AD CF–2020–41, issued October 15, 2020 (TCCA AD CF–2020–41). (d) Subject Air Transport Association (ATA) of America Code 72, Engines. (e) Reason This AD was prompted by reports of inflight engine shutdowns (IFESs); investigation results indicated that this could be caused by high altitude climbs at higher thrust settings on engines with certain thrust ratings. The FAA is issuing this AD to provide the flightcrew with information and procedures for operation above 29,000 feet to prevent uncontained failure of an engine during an IFES, which could result in structural damage and reduced structural integrity of the airplane. jbell on DSKJLSW7X2PROD with PROPOSALS (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Requirements Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, paragraph A., of TCCA AD CF–2020–41. VerDate Sep<11>2014 16:09 Apr 15, 2021 Jkt 253001 (h) Exceptions to TCCA AD CF–2020–41 (1) Where TCCA AD CF–2020–41 refers to its effective date, this AD requires using the effective date of this AD. (2) Where paragraph A. of TCCA AD CF– 2020–41 requires amending the airplane flight manual (AFM) by ‘‘incorporating the Supplement 21 Operation above 29,000 feet from AFM Revision 15–A, dated 10 September 2020,’’ this AD requires amending the existing AFM by incorporating Supplement 21—Operation Above 29,000 Feet, of Airbus A220–100 Airplane Flight Manual, Publication BD500–3AB48–22200– 00, Issue 016, dated October 16, 2020. (3) Where paragraph A. of TCCA AD CF– 2020–41 specifies to ‘‘inform all flight crews of the new supplement and thereafter operate the aeroplane accordingly,’’ this AD does not require those actions as those actions are already required by existing FAA operating regulations. (4) Where paragraphs B. and C. of TCCA AD CF–2020–41 specify procedures for a borescope inspection for signs of damage of the 1st stage axial low-pressure compressor (LPC) rotor of each engine, to be performed after the AFM N1 limitation has been exceeded, this AD does not require that action. (5) Where paragraph C. of TCCA AD CF– 2020–41 describes an optional installation of health management unit reports to monitor N1 exceedances, this AD does not include that option. (i) Other FAA AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, New York ACO 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 ATTN: Program Manager, Continuing Operational Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516–228–7300; fax 516–794–5531. 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. (2) Contacting the Manufacturer: For any requirement in this AD to obtain instructions from a manufacturer, the instructions must be accomplished using a method approved by the Manager, New York ACO Branch, FAA; or Transport Canada Civil Aviation (TCCA); or Airbus Canada’s TCCA Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature. (j) Related Information (1) For TCCA AD CF–2020–41, contact the TCCA, Transport Canada National Aircraft Certification, 159 Cleopatra Drive, Nepean, Ontario, K1A 0N5, CANADA; telephone 888– 663–3639; email AD-CN@tc.gc.ca; internet PO 00000 Frm 00064 Fmt 4702 Sfmt 4702 https://tc.canada.ca/en/aviation. For Airbus service information identified in this AD, contact Airbus Canada Limited Partnership, 13100 Henri-Fabre Boulevard, Mirabel, Que´bec J7N 3C6, Canada; telephone 450– 476–7676; email a220_crc@abc.airbus; internet http://a220world.airbus.com. You may view this material at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. This material may be found in the AD docket on the internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2021–0269. (2) For more information about this AD, contact Thomas Niczky, Aerospace Engineer, Avionics and Electrical Systems Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516–228–7347; fax 516–794–5531; email 9-avs-nyaco-cos@faa.gov. Issued on April 2, 2021. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2021–07201 Filed 4–15–21; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 71 [Docket No. FAA–2021–0159; Airspace Docket No. 21–ACE–6] RIN 2120–AA66 Proposed Amendment of Class E Airspace; Scott City, KS Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: This action proposes to amend the Class E airspace extending upward from 700 feet above the surface at Scott City Municipal Airport, Scott City, KS. The FAA is proposing this action as the result of an airspace review caused by the decommissioning of the Scott City non-directional beacon (NDB). The geographic coordinates of the airport would also be updated to coincide with the FAAs aeronautical database. DATES: Comments must be received on or before June 1, 2021. ADDRESSES: Send comments on this proposal to the U.S. Department of Transportation, Docket Operations, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590; telephone (202) 366–9826, or (800) 647–5527. You must identify FAA Docket No. FAA–2021– SUMMARY: E:\FR\FM\16APP1.SGM 16APP1

Agencies

[Federal Register Volume 86, Number 72 (Friday, April 16, 2021)]
[Proposed Rules]
[Pages 20097-20100]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-07201]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2021-0269; Project Identifier MCAI-2020-01417-T]
RIN 2120-AA64


Airworthiness Directives; Airbus Canada Limited Partnership (Type 
Certificate Previously Held by C Series Aircraft Limited Partnership 
(CSALP); Bombardier, Inc.) Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) 
for certain Airbus Canada Limited Partnership Model BD-500-1A10 and

[[Page 20098]]

BD-500-1A11 airplanes. This proposed AD was prompted by reports of in-
flight engine shutdowns (IFESs); investigation results indicated that 
this could be caused by high altitude climbs at higher thrust settings 
on engines with certain thrust ratings. This proposed AD would require 
amending the existing airplane flight manual (AFM) to incorporate a new 
limitation and revise certain normal procedures, as specified in a 
Transport Canada Civil Aviation (TCCA) AD, which is proposed for 
incorporation by reference. 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 1, 
2021.

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 TCCA material that will be incorporated by reference (IBR) in 
this AD, contact the TCCA, Transport Canada National Aircraft 
Certification, 159 Cleopatra Drive, Nepean, Ontario, K1A 0N5, CANADA; 
telephone 888-663-3639; email [email protected]; internet https://tc.canada.ca/en/aviation. For Airbus material that will be IBR in this 
AD, contact Airbus Canada Limited Partnership, 13100 Henri-Fabre 
Boulevard, Mirabel, Qu[eacute]bec J7N 3C6, Canada; telephone 450-476-
7676; email [email protected]; internet http://a220world.airbus.com. 
You may view this IBR material at the FAA, Airworthiness Products 
Section, Operational Safety Branch, 2200 South 216th St., Des Moines, 
WA. For information on the availability of this material at the FAA, 
call 206-231-3195. It is also available in the AD docket on the 
internet at https://www.regulations.gov by searching for and locating 
Docket No. FAA-2021-0269.

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-2021-
0269; 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, any comments received, and other information. The street 
address for Docket Operations is listed above.

FOR FURTHER INFORMATION CONTACT: Thomas Niczky, Aerospace Engineer, 
Avionics and Electrical Systems Section, FAA, New York ACO Branch, 1600 
Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7347; 
fax 516-794-5531; 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 ADDRESSES. Include ``Docket No. FAA-2021-0269; Project Identifier 
MCAI-2020-01417-T'' at the beginning of your comments. The most helpful 
comments reference a specific portion of the proposal, 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 
the proposal because of those comments.
    Except 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 proposed AD.

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 
Thomas Niczky, Aerospace Engineer, Avionics and Electrical Systems 
Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7347; fax 516-794-5531; email [email protected]. Any commentary that the FAA receives which is 
not specifically designated as CBI will be placed in the public docket 
for this rulemaking.

Background

    TCCA, which is the aviation authority for Canada, has issued TCCA 
AD CF-2020-41, issued October 15, 2020 (TCCA AD CF-2020-41) (also 
referred to as the Mandatory Continuing Airworthiness Information, or 
the MCAI), to correct an unsafe condition for certain Airbus Canada 
Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes.
    This proposed AD was prompted by reports of IFESs; investigations 
are ongoing to determine the root cause. Investigation results 
indicated that an IFES could be caused by high altitude climbs at 
higher thrust settings on engines with certain thrust ratings. The FAA 
is proposing this AD to provide the flightcrew with information and 
procedures for operation above 29,000 feet to prevent uncontained 
failure of an engine during an IFES, which could result in structural 
damage and reduced structural integrity of the airplane. See the MCAI 
for additional background information.

Related Service Information Under 1 CFR Part 51

    TCCA AD CF-2020-41 specifies procedures for amending the applicable 
AFM to incorporate a new limitation and revise the normal procedures to 
limit the engine N1 setting for flights above 29,000 feet.
    Airbus Canada Limited Partnership has issued Supplement 21--
Operation Above 29000 Feet, of Airbus A220-100 Airplane Flight Manual, 
Publication BD500-3AB48-22200-00, Issue 016, dated October 16, 2020. 
This supplement specifies limitations, information, and procedures for 
operation above 29,000 feet.
    This material 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 and Requirements of This Proposed AD

    This product has been approved by the aviation authority of another 
country, and is approved for operation in the United States. Pursuant 
to the FAA's bilateral agreement with the State of Design Authority, 
the FAA has been

[[Page 20099]]

notified of the unsafe condition described in the MCAI referenced 
above. The FAA is proposing this AD because the FAA evaluated all the 
relevant information 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 accomplishing the actions specified 
in TCCA AD CF-2020-41 described previously, as incorporated by 
reference, except as specified under ``Differences Between this 
Proposed AD and the MCAI'' in this NPRM, and except for any differences 
identified as exceptions in the regulatory text of this AD.

Differences Between This Proposed AD and the MCAI

    The MCAI requires a borescope inspection for signs of damage of the 
1st stage axial low-pressure compressor (LPC) rotor of each engine, and 
allows for the optional installation of health management unit reports 
to monitor N1 exceedances. This proposed AD does not include either 
provision.
    The MCAI also requires amending the AFM by ``incorporating the 
Supplement 21 Operation above 29000 feet from AFM Revision 15-A dated 
10 September 2020.'' Since the MCAI was issued, Supplement 21 was 
revised. This proposed AD would require the incorporation of Supplement 
21--Operation Above 29000 Feet, of Airbus A220-100 Airplane Flight 
Manual, Publication BD500-3AB48-22200-00, Issue 016, dated October 16, 
2020.
    The MCAI requires operators to ``inform all flight crews'' of 
revisions to the AFM, and thereafter to ``operate the aeroplane 
accordingly.'' However, this proposed AD would not specifically require 
those actions as those actions are already required by FAA regulations.
    FAA regulations require operators furnish to pilots any changes to 
the AFM (ex: 14 CFR 121.137, and to ensure the pilots are familiar with 
the AFM (ex: 14 CFR 91.505). As with any other training requirement, 
training on the updated AFM content is tracked by the operators and 
recorded in each pilot's training record, which is available for the 
FAA to review.
    FAA regulations also require pilots to follow the procedures in the 
existing AFM including all updates. 14 CFR 91.9 requires that no person 
may operate a civil aircraft without complying with the operating 
limitations specified in the AFM. Therefore, including a requirement in 
this proposed AD to operate the airplane according to the revised AFM 
would be redundant and unnecessary. Further, compliance with such a 
requirement in an AD would be impracticable to demonstrate or track on 
an ongoing basis; therefore, a requirement to operate the airplane in 
such a manner would be unenforceable.
    These differences have been coordinated with TCCA.

Explanation of Required Compliance Information

    In the FAA's ongoing efforts to improve the efficiency of the AD 
process, the FAA initially worked with Airbus and EASA to develop a 
process to use certain EASA ADs as the primary source of information 
for compliance with requirements for corresponding FAA ADs. The FAA has 
since coordinated with other manufacturers and civil aviation 
authorities (CAAs) to use this process. As a result, TCCA AD CF-2020-41 
will be incorporated by reference in the FAA final rule. This proposed 
AD would, therefore, require compliance with TCCA AD CF-2020-41 in its 
entirety, through that incorporation, except for any differences 
identified as exceptions in the regulatory text of this proposed AD. 
Service information specified in TCCA AD CF-2020-41 that is required 
for compliance with TCCA AD CF-2020-41 will be available on the 
internet at https://www.regulations.gov by searching for and locating 
Docket No. FAA-2021-0269 after the FAA final rule is published.

Interim Action

    The FAA considers this proposed AD interim action. If final action 
is later identified, the FAA might consider further rulemaking then.

Costs of Compliance

    The FAA estimates that this proposed AD affects 42 airplanes of 
U.S. registry. The FAA estimates the following costs to comply with 
this proposed AD:

                                      Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
                                                                                    Cost per       Cost on U.S.
                          Labor cost                              Parts cost        product         operators
----------------------------------------------------------------------------------------------------------------
1 work-hour x $85 per hour = $85.............................              $0              $85           $3,570
----------------------------------------------------------------------------------------------------------------

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.
    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) Would not affect intrastate aviation in Alaska, and
    (3) Would 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.

[[Page 20100]]

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:

Airbus Canada Limited Partnership (Type Certificate Previously Held 
by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.): 
Docket No. FAA-2021-0269; Project Identifier MCAI-2020-01417-T.

(a) Comments Due Date

    The FAA must receive comments by June 1, 2021.

(b) Affected Airworthiness Directives (ADs)

    None.

(c) Applicability

    This AD applies to Airbus Canada Limited Partnership (type 
certificate previously held by C Series Aircraft Limited Partnership 
(CSALP); Bombardier, Inc.) Model BD-500-1A10 and BD-500-1A11 
airplanes, certificated in any category, as identified in Transport 
Canada Civil Aviation (TCCA) AD CF-2020-41, issued October 15, 2020 
(TCCA AD CF-2020-41).

(d) Subject

    Air Transport Association (ATA) of America Code 72, Engines.

(e) Reason

    This AD was prompted by reports of in-flight engine shutdowns 
(IFESs); investigation results indicated that this could be caused 
by high altitude climbs at higher thrust settings on engines with 
certain thrust ratings. The FAA is issuing this AD to provide the 
flightcrew with information and procedures for operation above 
29,000 feet to prevent uncontained failure of an engine during an 
IFES, which could result in structural damage and reduced structural 
integrity of the airplane.

(f) Compliance

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

(g) Requirements

    Except as specified in paragraph (h) of this AD: Comply with all 
required actions and compliance times specified in, and in 
accordance with, paragraph A., of TCCA AD CF-2020-41.

(h) Exceptions to TCCA AD CF-2020-41

    (1) Where TCCA AD CF-2020-41 refers to its effective date, this 
AD requires using the effective date of this AD.
    (2) Where paragraph A. of TCCA AD CF-2020-41 requires amending 
the airplane flight manual (AFM) by ``incorporating the Supplement 
21 Operation above 29,000 feet from AFM Revision 15-A, dated 10 
September 2020,'' this AD requires amending the existing AFM by 
incorporating Supplement 21--Operation Above 29,000 Feet, of Airbus 
A220-100 Airplane Flight Manual, Publication BD500-3AB48-22200-00, 
Issue 016, dated October 16, 2020.
    (3) Where paragraph A. of TCCA AD CF-2020-41 specifies to 
``inform all flight crews of the new supplement and thereafter 
operate the aeroplane accordingly,'' this AD does not require those 
actions as those actions are already required by existing FAA 
operating regulations.
    (4) Where paragraphs B. and C. of TCCA AD CF-2020-41 specify 
procedures for a borescope inspection for signs of damage of the 1st 
stage axial low-pressure compressor (LPC) rotor of each engine, to 
be performed after the AFM N1 limitation has been exceeded, this AD 
does not require that action.
    (5) Where paragraph C. of TCCA AD CF-2020-41 describes an 
optional installation of health management unit reports to monitor 
N1 exceedances, this AD does not include that option.

(i) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York ACO 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 ATTN: Program Manager, Continuing Operational 
Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7300; fax 516-794-5531. 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.
    (2) Contacting the Manufacturer: For any requirement in this AD 
to obtain instructions from a manufacturer, the instructions must be 
accomplished using a method approved by the Manager, New York ACO 
Branch, FAA; or Transport Canada Civil Aviation (TCCA); or Airbus 
Canada's TCCA Design Approval Organization (DAO). If approved by the 
DAO, the approval must include the DAO-authorized signature.

(j) Related Information

    (1) For TCCA AD CF-2020-41, contact the TCCA, Transport Canada 
National Aircraft Certification, 159 Cleopatra Drive, Nepean, 
Ontario, K1A 0N5, CANADA; telephone 888-663-3639; email [email protected]; internet https://tc.canada.ca/en/aviation. For Airbus 
service information identified in this AD, contact Airbus Canada 
Limited Partnership, 13100 Henri-Fabre Boulevard, Mirabel, 
Qu[eacute]bec J7N 3C6, Canada; telephone 450-476-7676; email 
[email protected]; internet http://a220world.airbus.com. You may 
view this material at the FAA, Airworthiness Products Section, 
Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For 
information on the availability of this material at the FAA, call 
206-231-3195. This material may be found in the AD docket on the 
internet at https://www.regulations.gov by searching for and 
locating Docket No. FAA-2021-0269.
    (2) For more information about this AD, contact Thomas Niczky, 
Aerospace Engineer, Avionics and Electrical Systems Section, FAA, 
New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 
11590; telephone 516-228-7347; fax 516-794-5531; email [email protected].

    Issued on April 2, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2021-07201 Filed 4-15-21; 8:45 am]
BILLING CODE 4910-13-P