Airworthiness Directives; Bombardier, Inc., Airplanes, 67577-67580 [2024-18478]

Download as PDF Federal Register / Vol. 89, No. 162 / Wednesday, August 21, 2024 / Proposed Rules List of Subjects in 14 CFR Part 39 (h) Exceptions to EASA AD 2024–0057 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. (1) Where EASA AD 2024–0057 refers to March 13, 2024, or its effective date, this AD requires using the effective date of this AD. (2) This AD does not adopt the ‘‘Remarks’’ section of EASA AD 2024–0057. 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 SAS: Docket No. FAA–2024–2025; Project Identifier MCAI–2024–00120–T. (a) Comments Due Date The FAA must receive comments on this airworthiness directive (AD) by October 7, 2024. (b) Affected ADs None. (c) Applicability This AD applies to all Airbus SAS Model A321–251NX, –252NX, –253NX, –271NX, and –272NX airplanes, certificated in any category. (d) Subject Air Transport Association (ATA) of America Code 25, Equipment/Furnishings. (e) Unsafe Condition This AD was prompted by the discovery during a quality review performed during manufacturing, that a torque strip indicator (material ‘‘Dykem’’) had been applied on the orifice fitting on certain slides’ inflation reservoirs’ venting holes. The FAA is issuing this AD to address blocked venting holes on the orifice fitting on an escape slide’s inflation reservoir. The unsafe condition, if not addressed, could, in combination with a slide reservoir pressure loss, result in deployment in flight of a non-inflated slide, possibly resulting in damage to, and reduced control of, the airplane. lotter on DSK11XQN23PROD with PROPOSALS1 (f) Compliance Comply with this AD within the compliance times specified, unless already done. Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency (EASA) AD 2024–0057, dated February 28, 2024 (EASA AD 2024–0057). 17:00 Aug 20, 2024 Jkt 262001 The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, International Validation 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 responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the International Validation Branch, mail it to the address identified in paragraph (j) of this AD. Information may be emailed to: 9-AVS-AIR-730-AMOC@faa.gov. Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards 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, International Validation Branch, FAA; or EASA; or Airbus SAS’s EASA Design Organization Approval (DOA). If approved by the DOA, the approval must include the DOA-authorized signature. (3) Required for Compliance (RC): Except as required by paragraph (i)(2) of this AD, if any service information referenced in EASA AD 2024–0057 contains paragraphs that are labeled as RC, the instructions in RC paragraphs, including subparagraphs under an RC paragraph, must be done to comply with this AD; any paragraphs, including subparagraphs under those paragraphs, that are not identified as RC are recommended. The instructions in paragraphs, including subparagraphs under those paragraphs, not identified as RC may be deviated from using accepted methods in accordance with the operator’s maintenance or inspection program without obtaining approval of an AMOC, provided the instructions identified as RC can be done and the airplane can be put back in an airworthy condition. Any substitutions or changes to instructions identified as RC require approval of an AMOC. (j) Additional Information For more information about this AD, contact Timothy Dowling, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 206– 231–3667; email timothy.p.dowling@faa.gov. (k) Material Incorporated by Reference (g) Requirements VerDate Sep<11>2014 (i) Additional AD Provisions (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this material as applicable to do the actions required by this AD, unless this AD specifies otherwise. PO 00000 Frm 00015 Fmt 4702 Sfmt 4702 67577 (i) European Union Aviation Safety Agency (EASA) AD 2024–0057, dated February 28, 2024. (ii) [Reserved] (3) For EASA AD 2024–0057, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; email ADs@easa.europa.eu; website easa.europa.eu. You may find this EASA AD on the EASA website at ad.easa.europa.eu. (4) 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. (5) You may view this material at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ ibr-locationsoremailfr.inspection@nara.gov. Issued on August 12, 2024. Peter A. White, Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2024–18483 Filed 8–20–24; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2024–2023; Project Identifier MCAI–2023–01246–T] RIN 2120–AA64 Airworthiness Directives; 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 Bombardier, Inc., Model BD– 100–1A10 airplanes. This proposed AD was prompted by uncommanded horizontal stabilizer motion during several in-service events caused by a problem with the trim switch wiring. This proposed AD would require installing the pitch/roll trim switch relays. 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 October 7, 2024. 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 regulations.gov. Follow the instructions for submitting comments. SUMMARY: E:\FR\FM\21AUP1.SGM 21AUP1 67578 Federal Register / Vol. 89, No. 162 / Wednesday, August 21, 2024 / Proposed Rules • 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. AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA–2024–2023; 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. Material Incorporated by Reference: • For Bombardier material identified in this proposed AD, contact Bombardier Business Aircraft Customer Response Center, 400 Côte-Vertu Road West, Dorval, Québec H4S 1Y9, Canada; phone 514–855–2999; email ac.yul@ aero.bombardier.com; website bombardier.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. FOR FURTHER INFORMATION CONTACT: Steven Dzierzynski, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516–228–7300; email 9-avsnyaco-cos@faa.gov. SUPPLEMENTARY INFORMATION: lotter on DSK11XQN23PROD with PROPOSALS1 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–2024–2023; Project Identifier MCAI–2023–01246–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 regulations.gov, including any personal information you provide. The agency VerDate Sep<11>2014 17:00 Aug 20, 2024 Jkt 262001 will also post a report summarizing each substantive verbal contact received about this NPRM. 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 Steven Dzierzynski, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516–228–7300; email 9-avs-nyaco-cos@faa.gov. Any commentary that the FAA receives that is not specifically designated as CBI will be placed in the public docket for this rulemaking. Background Transport Canada, which is the aviation authority for Canada, has issued Transport Canada AD CF–2023– 77, dated December 7, 2023 (Transport Canada AD CF–2023–77) (also referred to after this as the MCAI), to correct an unsafe condition on certain Bombardier, Inc., Model BD–100–1A10 airplanes. The MCAI states that during several inservice events, following a STAB TRIM FAULT advisory message and an autopilot disconnect, both pilot and co-pilot commands to trim the horizontal stabilizer nose-up resulted in a nosedown movement of the horizontal stabilizer. In some events, the horizontal stabilizer reached the full travel nosedown position before the crew recognized the nature of the problem, and quickly recovered control of the airplane for safe landing. Transport Canada issued AD CF–2022–03, dated February 1, 2022 (Transport Canada AD CF–2022–03) (which corresponds to FAA AD 2022–12–02 (87 FR 34125, June 6, 2022)), as a mitigating action to require the use of an Expanded Pitch Trim Pre-Flight Check, the use of Trim Malfunction procedures, the revision of the AP STAB TRIM FAIL caution and STAB TRIM FAULT advisory procedures to address this unsafe condition. During the ongoing PO 00000 Frm 00016 Fmt 4702 Sfmt 4702 investigation by Bombardier and the supplier of the horizontal stabilizer pitch/roll trim switch (trim switch), Bombardier determined that one of the springs within the trim switch had failed. The supplier of the spring was changed in 2019. The majority of observed trim switch failures occurred in trim switches that were manufactured after 2019. Consequently, Transport Canada issued AD CF–2022–24, dated May 2, 2022 (Transport Canada AD CF– 2022–24) (which corresponds to FAA AD 2023–02–01 (88 FR 7856, February 7, 2023)), to remove and replace the defective springs in the affected fleet. At that time, Bombardier also found an existing issue with the trim switch wiring installation. The problem with the trim switch wiring was identified as the main cause of the in-service unintended horizontal stabilizer motion events. On this airplane model, manual trim is accomplished by enabling the trim function by both pressing down on the trim switch and simultaneously moving the switch up, down, left, or right, as required to command trim in pitch or roll. The current wiring of the system is such that an enable signal originating from either the pilot-side or the copilot-side trim switch will enable both sides. By design, the pilot-side trim commands have priority over the copilot-side trim commands. Thus, if trim is enabled via the copilot-side trim switch, and the pilot-side trim switch malfunctions, it is possible for trim to move uncommanded or opposite to the intended direction. Transport Canada AD CF–2023–77 requires changes to the trim switch wiring installation to ensure the pilot and co-pilot trim Enable/Arm switch signals remain segregated in both roll and pitch axes. The FAA is proposing this AD to address the problem with the trim switch wiring, which is the main cause of the uncommanded horizontal stabilizer motion. The unsafe condition, if not addressed, could result in increased crew workload and reduced safety margins, and if the flightcrew is unable to regain control of the horizontal stabilizer, would result in loss of control of the airplane and high control forces. You may examine the MCAI in the AD docket at regulations.gov under Docket No. FAA–2024–2023. Material Incorporated by Reference Under 1 CFR Part 51 The FAA reviewed Bombardier Service Bulletin 100–27–22 and Bombardier Service Bulletin 350–27– 012, both dated December 29, 2022. The material specifies procedures to install the pitch/roll trim switch relays. The E:\FR\FM\21AUP1.SGM 21AUP1 Federal Register / Vol. 89, No. 162 / Wednesday, August 21, 2024 / Proposed Rules installation includes reworking the plate assembly; installing relay bracket assemblies, relays, ground return stacks on the relay bracket assemblies, wires for the relays, and line replaceable units and trays on the left-side and right-side avionic racks; and performing operational testing. These documents are distinct since they apply to different airplane serial numbers. 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 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 this State of Design Authority, it has notified the FAA of the unsafe condition described in the MCAI and material referenced above. The FAA is issuing this NPRM after determining that the unsafe condition described previously is likely to exist or develop on other products of the same type design. 67579 Proposed AD Requirements in This NPRM This proposed AD would require accomplishing the actions specified in the material already described. Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 359 airplanes of U.S. registry. The FAA estimates the following costs to comply with this proposed AD: ESTIMATED COSTS FOR REQUIRED ACTIONS Labor cost Up to 45 work-hours × $85 per hour = Up to $3,825 .............. lotter on DSK11XQN23PROD with PROPOSALS1 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 VerDate Sep<11>2014 17:00 Aug 20, 2024 Jkt 262001 Cost per product Parts cost $3,582 Up to $7,407 ........................... 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 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: ■ Bombardier, Inc.: Docket No. FAA–2024– 2023; Project Identifier MCAI–2023– 01246–T. (a) Comments Due Date The FAA must receive comments on this airworthiness directive (AD) by October 7, 2024. (b) Affected ADs None. (c) Applicability This AD applies to Bombardier, Inc., Model BD–100–1A10 airplanes, certificated in any category, serial numbers 20003 through 20500 inclusive and 20501 through 20936 inclusive. (d) Subject Air Transport Association (ATA) of America Code 27, Flight controls. PO 00000 Frm 00017 Fmt 4702 Cost on U.S. operators Sfmt 4702 Up to $2,659,113. (e) Unsafe Condition This AD was prompted by uncommanded horizontal stabilizer motion during several in-service events caused by a problem with the trim switch wiring. The FAA is issuing this AD to address the problem with the trim switch wiring. The unsafe condition, if not addressed, could result in increased crew workload and reduced safety margins, and if the flightcrew is unable to regain control of the horizontal stabilizer, would result in loss of control of the airplane and high control forces. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Installation of Pitch/Roll Trim Switch Relays and Tests Within 3,000 flight hours or 5 years, whichever occurs first, from the effective date of this AD, install the pitch/roll trim switch relays, in accordance with sections 2.B. and 2.C. of the Accomplishment Instructions of the applicable material specified in paragraph (g)(1) or (2) of this AD. (1) Bombardier Service Bulletin 100–27– 22, dated December 29, 2022 (for airplane serial numbers 20003 through 20500 inclusive). (2) Bombardier Service Bulletin 350–27– 012, dated December 29, 2022 (for airplane serial numbers 20501 through 20936 inclusive). (h) Additional AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, International Validation 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 responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the International Validation E:\FR\FM\21AUP1.SGM 21AUP1 67580 Federal Register / Vol. 89, No. 162 / Wednesday, August 21, 2024 / Proposed Rules Branch, mail it to the address identified in paragraph (i) of this AD. Information may be emailed to: 9-AVS-NYACO-COS@faa.gov. Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards 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, International Validation Branch, FAA; or Transport Canada; or Bombardier, Inc.’s Transport Canada Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature. DEPARTMENT OF THE TREASURY (i) Additional Information SUMMARY: For more information about this AD, contact Steven Dzierzynski, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516– 228–7300; email 9-avs-nyaco-cos@faa.gov. (j) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference of the material listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this material as applicable to do the actions required by this AD, unless this AD specifies otherwise. (i) Bombardier Service Bulletin 100–27–22, dated December 29, 2022. (ii) Bombardier Service Bulletin 350–27– 012, dated December 29, 2022. (3) For Bombardier material identified in this AD, contact Bombardier Business Aircraft Customer Response Center, 400 CôteVertu Road West, Dorval, Québec H4S 1Y9, Canada; phone 514–855–2999; email ac.yul@ aero.bombardier.com; website bombardier.com. (4) 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. (5) You may view this material at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ ibr-locations or email fr.inspection@nara.gov. Issued on August 12, 2024. Victor Wicklund, Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. lotter on DSK11XQN23PROD with PROPOSALS1 [FR Doc. 2024–18478 Filed 8–20–24; 8:45 am] BILLING CODE 4910–13–P VerDate Sep<11>2014 17:00 Aug 20, 2024 Jkt 262001 Internal Revenue Service 26 CFR Part 20 [REG–119683–22] RIN 1545–BQ88 Revising Qualified Domestic Trust Regulations Under Section 2056A To Update Outdated References and Procedures Internal Revenue Service (IRS), Treasury. ACTION: Notice of proposed rulemaking. AGENCY: This document contains proposed amendments to the Federal estate tax regulations applicable to estates of decedents passing property to or for the benefit of a noncitizen spouse in a domestic trust for which the executor of the decedent’s estate has made an election to be a qualified domestic trust and the trust satisfies all of the requirements for such treatment under applicable Federal tax law and regulations. The proposed regulations would modify those regulations to update outdated references, information, and procedures. The proposed regulations primarily would affect the estates of decedents passing property to or for the benefit of a noncitizen spouse in such a trust pursuant to applicable Federal tax law. DATES: Written or electronic comments as well as requests for a public hearing must be received by October 21, 2024. ADDRESSES: Commenters are strongly encouraged to submit public comments electronically via the Federal eRulemaking Portal at https:// www.regulations.gov (indicate IRS and REG–119683–22) by following the online instructions for submitting comments. Requests for a public hearing must be submitted as prescribed in the ‘‘Comments and Requests for a Public Hearing’’ section. Once submitted to the Federal eRulemaking Portal, comments cannot be edited or withdrawn. The Department of the Treasury (Treasury Department) and the IRS will publish for public availability any comment submitted to the IRS’s public docket. Send paper submissions to: CC:PA:01:PR (REG–119683–22), Room 5203, Internal Revenue Service, P.O. Box 7604, Ben Franklin Station, Washington, DC 20044. FOR FURTHER INFORMATION CONTACT: Concerning the proposed regulations, Donna Douglas, (202) 317–6859 (not a toll-free number); concerning the submission of comments and/or requests for a public hearing, Vivian PO 00000 Frm 00018 Fmt 4702 Sfmt 4702 Hayes by email at publichearings@ irs.gov or by phone at (202) 317–6901 (not a toll-free number). SUPPLEMENTARY INFORMATION: Background This document contains proposed amendments to the Estate Tax Regulations (26 CFR part 20) under section 2056A of the Internal Revenue Code (Code). I. Statutory Overview Although section 2056(d)(1) of the Code generally disallows a marital deduction for the value of property passing to a noncitizen spouse of a decedent or donor, section 2056(d)(2)(A) allows a marital deduction for such property passing to the decedent’s surviving spouse in a qualified domestic trust (QDOT), as defined in section 2056A. Section 2056A of the Code was added by the Technical and Miscellaneous Revenue Act of 1988 (Pub. L. 100–647) and further amended by the Revenue Reconciliation Act of 1989 (Pub. L. 101–239), the Revenue Reconciliation Act of 1990 (Pub. L. 101– 508), the Taxpayer Relief Act of 1997 (Pub. L. 105–34), and the Economic Growth and Tax Relief Reconciliation Act of 2001 (Pub. L. 107–16). Generally, for purposes of sections 2056 and 2056A, section 2056A(a) defines the term ‘‘qualified domestic trust,’’ with respect to any decedent, as any trust if (1) its trust instrument meets certain requirements regarding the identity and powers of the trustee, (2) such trust meets such requirements as the Secretary of the Treasury or her delegate (Secretary) may by regulations prescribe to ensure the collection of any tax imposed by section 2056A(b), and (3) an election under section 2056A by the executor of the decedent’s estate applies to such trust. Section 2056A(b) generally prescribes rules relating to a deferred estate tax on distributions of corpus from the QDOT during the spouse’s lifetime and on the balance of the corpus held in the QDOT on the date of the spouse’s death (section 2056A estate tax). Section 2056A(c) provides definitions of certain relevant terms, and section 2056A(d) provides rules regarding the section 2056A election. Finally, section 2056A(e) directs the Secretary to prescribe regulations as may be necessary or appropriate to carry out the purposes of section 2056A. II. Regulatory Overview Regulations addressing the application of sections 2056(d) and 2056A were published in the Federal Register (58 FR 305) as proposed E:\FR\FM\21AUP1.SGM 21AUP1

Agencies

[Federal Register Volume 89, Number 162 (Wednesday, August 21, 2024)]
[Proposed Rules]
[Pages 67577-67580]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2024-18478]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2024-2023; Project Identifier MCAI-2023-01246-T]
RIN 2120-AA64


Airworthiness Directives; 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 Bombardier, Inc., Model BD-100-1A10 airplanes. This 
proposed AD was prompted by uncommanded horizontal stabilizer motion 
during several in-service events caused by a problem with the trim 
switch wiring. This proposed AD would require installing the pitch/roll 
trim switch relays. 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 October 7, 
2024.

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 regulations.gov. Follow 
the instructions for submitting comments.

[[Page 67578]]

     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.
    AD Docket: You may examine the AD docket at regulations.gov under 
Docket No. FAA-2024-2023; 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.
    Material Incorporated by Reference:
     For Bombardier material identified in this proposed AD, 
contact Bombardier Business Aircraft Customer Response Center, 400 
C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec H4S 1Y9, Canada; 
phone 514-855-2999; email bombardier.com">ac.yul@aero.bombardier.com; website 
bombardier.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.

FOR FURTHER INFORMATION CONTACT: Steven Dzierzynski, Aviation Safety 
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; 
telephone 516-228-7300; 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-2024-2023; Project Identifier 
MCAI-2023-01246-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 
regulations.gov, including any personal information you provide. The 
agency will also post a report summarizing each substantive verbal 
contact received about this NPRM.

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 
Steven Dzierzynski, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, 
Suite 410, Westbury, NY 11590; telephone 516-228-7300; email [email protected]. Any commentary that the FAA receives that is not 
specifically designated as CBI will be placed in the public docket for 
this rulemaking.

Background

    Transport Canada, which is the aviation authority for Canada, has 
issued Transport Canada AD CF-2023-77, dated December 7, 2023 
(Transport Canada AD CF-2023-77) (also referred to after this as the 
MCAI), to correct an unsafe condition on certain Bombardier, Inc., 
Model BD-100-1A10 airplanes. The MCAI states that during several in-
service events, following a STAB TRIM FAULT advisory message and an 
auto-pilot disconnect, both pilot and co-pilot commands to trim the 
horizontal stabilizer nose-up resulted in a nose-down movement of the 
horizontal stabilizer. In some events, the horizontal stabilizer 
reached the full travel nose-down position before the crew recognized 
the nature of the problem, and quickly recovered control of the 
airplane for safe landing. Transport Canada issued AD CF-2022-03, dated 
February 1, 2022 (Transport Canada AD CF-2022-03) (which corresponds to 
FAA AD 2022-12-02 (87 FR 34125, June 6, 2022)), as a mitigating action 
to require the use of an Expanded Pitch Trim Pre-Flight Check, the use 
of Trim Malfunction procedures, the revision of the AP STAB TRIM FAIL 
caution and STAB TRIM FAULT advisory procedures to address this unsafe 
condition. During the ongoing investigation by Bombardier and the 
supplier of the horizontal stabilizer pitch/roll trim switch (trim 
switch), Bombardier determined that one of the springs within the trim 
switch had failed. The supplier of the spring was changed in 2019. The 
majority of observed trim switch failures occurred in trim switches 
that were manufactured after 2019. Consequently, Transport Canada 
issued AD CF-2022-24, dated May 2, 2022 (Transport Canada AD CF-2022-
24) (which corresponds to FAA AD 2023-02-01 (88 FR 7856, February 7, 
2023)), to remove and replace the defective springs in the affected 
fleet. At that time, Bombardier also found an existing issue with the 
trim switch wiring installation. The problem with the trim switch 
wiring was identified as the main cause of the in-service unintended 
horizontal stabilizer motion events. On this airplane model, manual 
trim is accomplished by enabling the trim function by both pressing 
down on the trim switch and simultaneously moving the switch up, down, 
left, or right, as required to command trim in pitch or roll. The 
current wiring of the system is such that an enable signal originating 
from either the pilot-side or the copilot-side trim switch will enable 
both sides. By design, the pilot-side trim commands have priority over 
the copilot-side trim commands. Thus, if trim is enabled via the 
copilot-side trim switch, and the pilot-side trim switch malfunctions, 
it is possible for trim to move uncommanded or opposite to the intended 
direction. Transport Canada AD CF-2023-77 requires changes to the trim 
switch wiring installation to ensure the pilot and co-pilot trim 
Enable/Arm switch signals remain segregated in both roll and pitch 
axes.
    The FAA is proposing this AD to address the problem with the trim 
switch wiring, which is the main cause of the uncommanded horizontal 
stabilizer motion. The unsafe condition, if not addressed, could result 
in increased crew workload and reduced safety margins, and if the 
flightcrew is unable to regain control of the horizontal stabilizer, 
would result in loss of control of the airplane and high control 
forces.
    You may examine the MCAI in the AD docket at regulations.gov under 
Docket No. FAA-2024-2023.

Material Incorporated by Reference Under 1 CFR Part 51

    The FAA reviewed Bombardier Service Bulletin 100-27-22 and 
Bombardier Service Bulletin 350-27-012, both dated December 29, 2022. 
The material specifies procedures to install the pitch/roll trim switch 
relays. The

[[Page 67579]]

installation includes reworking the plate assembly; installing relay 
bracket assemblies, relays, ground return stacks on the relay bracket 
assemblies, wires for the relays, and line replaceable units and trays 
on the left-side and right-side avionic racks; and performing 
operational testing. These documents are distinct since they apply to 
different airplane serial numbers.
    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

    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 this State of Design Authority, it 
has notified the FAA of the unsafe condition described in the MCAI and 
material referenced above. The FAA is issuing this NPRM after 
determining that the unsafe condition described previously is likely to 
exist or develop on other products of the same type design.

Proposed AD Requirements in This NPRM

    This proposed AD would require accomplishing the actions specified 
in the material already described.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would 
affect 359 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
----------------------------------------------------------------------------------------------------------------
Up to 45 work-hours x $85 per hour = Up           $3,582  Up to $7,407..............  Up to $2,659,113.
 to $3,825.
----------------------------------------------------------------------------------------------------------------

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.

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:

Bombardier, Inc.: Docket No. FAA-2024-2023; Project Identifier MCAI-
2023-01246-T.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by October 7, 2024.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Bombardier, Inc., Model BD-100-1A10 
airplanes, certificated in any category, serial numbers 20003 
through 20500 inclusive and 20501 through 20936 inclusive.

(d) Subject

    Air Transport Association (ATA) of America Code 27, Flight 
controls.

(e) Unsafe Condition

    This AD was prompted by uncommanded horizontal stabilizer motion 
during several in-service events caused by a problem with the trim 
switch wiring. The FAA is issuing this AD to address the problem 
with the trim switch wiring. The unsafe condition, if not addressed, 
could result in increased crew workload and reduced safety margins, 
and if the flightcrew is unable to regain control of the horizontal 
stabilizer, would result in loss of control of the airplane and high 
control forces.

(f) Compliance

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

(g) Installation of Pitch/Roll Trim Switch Relays and Tests

    Within 3,000 flight hours or 5 years, whichever occurs first, 
from the effective date of this AD, install the pitch/roll trim 
switch relays, in accordance with sections 2.B. and 2.C. of the 
Accomplishment Instructions of the applicable material specified in 
paragraph (g)(1) or (2) of this AD.
    (1) Bombardier Service Bulletin 100-27-22, dated December 29, 
2022 (for airplane serial numbers 20003 through 20500 inclusive).
    (2) Bombardier Service Bulletin 350-27-012, dated December 29, 
2022 (for airplane serial numbers 20501 through 20936 inclusive).

(h) Additional AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, 
International Validation 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 responsible Flight Standards Office, as 
appropriate. If sending information directly to the manager of the 
International Validation

[[Page 67580]]

Branch, mail it to the address identified in paragraph (i) of this 
AD. Information may be emailed to: [email protected]. Before 
using any approved AMOC, notify your appropriate principal 
inspector, or lacking a principal inspector, the manager of the 
responsible Flight Standards 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, International 
Validation Branch, FAA; or Transport Canada; or Bombardier, Inc.'s 
Transport Canada Design Approval Organization (DAO). If approved by 
the DAO, the approval must include the DAO-authorized signature.

(i) Additional Information

    For more information about this AD, contact Steven Dzierzynski, 
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7300; email [email protected].

(j) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference of the material listed in this paragraph 
under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this material as applicable to do the actions 
required by this AD, unless this AD specifies otherwise.
    (i) Bombardier Service Bulletin 100-27-22, dated December 29, 
2022.
    (ii) Bombardier Service Bulletin 350-27-012, dated December 29, 
2022.
    (3) For Bombardier material identified in this AD, contact 
Bombardier Business Aircraft Customer Response Center, 400 
C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec H4S 1Y9, Canada; 
phone 514-855-2999; email bombardier.com">ac.yul@aero.bombardier.com; website 
bombardier.com.
    (4) 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.
    (5) You may view this material at the National Archives and 
Records Administration (NARA). For information on the availability 
of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations or email [email protected].

    Issued on August 12, 2024.
Victor Wicklund,
Deputy Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2024-18478 Filed 8-20-24; 8:45 am]
BILLING CODE 4910-13-P

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