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###### Department of Transportation

###### Federal Aviation Administration

          - 14 CFR Part 39
          - [Docket No. FAA-2024-2669; Project Identifier MCAI-2024-00660-R; Amendment 39-22915; AD 2024-26-01]
          - RIN 2120-AA64

# AGENCY:

Federal Aviation Administration (FAA), DOT.

# ACTION:

Final rule; request for comments.

# SUMMARY:

The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Model H160-B helicopters. This AD was prompted by a report of excessive axial play of the rotating scissors spherical bearings. This AD requires measuring the axial play of the rotating scissors spherical bearings and, depending on the results, accomplishing corrective action and reporting inspection results, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

# DATES:

This AD is effective January 17, 2025.

The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of January 17, 2025.

The FAA must receive comments on this AD by February 18, 2025.

# 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.                    
      -  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                                ( print page 21)                              p.m., Monday through Friday, except Federal holidays.                    

*AD Docket:*                         You may examine the AD docket at                         *regulations.gov*                         under Docket No. FAA-2024-2669; 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 final rule, 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 EASA material identified in this AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; phone: +49 221 8999 000; email: ADs@easa.europa.eu;                          website:                          easa.europa.eu.                          You may find the EASA material on the EASA website at                          ad.easa.europa.eu. 
      - You may view this material at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Parkway, Room 6N-321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call (817) 222-5110. It is also available at regulations.gov                          under Docket No. FAA-2024-2669.                    

# FOR FURTHER INFORMATION CONTACT:

                        Michael Mueller, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: (847) 294-7543; email:                         *Michael.J.Mueller@faa.gov*.                    

# SUPPLEMENTARY INFORMATION:

## Comments Invited

                    The FAA invites you to send any written data, views, or arguments about this final rule. Send your comments to an address listed under the                     **ADDRESSES**                     section. Include “Docket No. FAA-2024-2669; Project Identifier MCAI-2024-00660-R” at the beginning of your comments. The most helpful comments reference a specific portion of the final rule, explain the reason for any recommended change, and include supporting data. The FAA will consider all comments received by the closing date and may amend this final rule because of those comments.                

                    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 final rule.                

## 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 AD contain commercial or financial information that is customarily treated as private, that you actually treat as private, and that is relevant or responsive to this AD, it is important that you clearly designate the submitted comments as CBI. Please mark each page of your submission containing CBI as “PROPIN.” The FAA will treat such marked submissions as confidential under the FOIA, and they will not be placed in the public docket of this AD. Submissions containing CBI should be sent to Michael Mueller, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: (847) 294-7543; email:                     *Michael.J.Mueller@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

EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA Emergency AD 2024-0206-E, dated October 22, 2024 (EASA AD 2024-0206-E) (also referred to as the MCAI), to correct an unsafe condition on Airbus Helicopters Model H160-B helicopters. The MCAI states that a report was received of excessive axial play in the rotating scissors spherical bearings. The FAA is issuing this AD to address excessive axial play of the rotating scissors spherical bearings. The unsafe condition, if not addressed, could result in reduced control of the helicopter.

                    You may examine the MCAI in the AD docket at                     *regulations.gov*                     under Docket No. FAA-2024-2669.                

## Material Incorporated by Reference Under 1 CFR Part 51

The FAA reviewed EASA AD 2024-0206-E. This material requires measuring the axial play of rotating scissors spherical bearing part number U623A40T1007, except those having serial numbers identified within. Depending on the results, EASA AD 2024-0206-E requires replacing the rotating scissors spherical bearings, or after a certain amount of flight time remeasuring the axial play again and replacing the rotating scissors spherical bearings. EASA AD 2024-0206-E also requires reporting inspection results to Airbus Helicopters.

                    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

These products have been approved by the aviation authority of another country and are 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 referenced above. The FAA is issuing this AD after determining that the unsafe condition described previously is likely to exist or develop on other products of the same type design.

## AD Requirements

This AD requires accomplishing the actions specified in the MCAI, described previously, except for any differences identified as exceptions in the regulatory text of this AD.

## Explanation of Required Compliance Information

                    In the FAA's ongoing efforts to improve the efficiency of the AD process, the FAA developed a process to use some civil aviation authority (CAA) ADs as the primary source of information for compliance with requirements for corresponding FAA ADs. The FAA has been coordinating this process with manufacturers and CAAs. As a result, EASA AD 2024-0206-E is incorporated by reference in this AD. This AD requires compliance with EASA AD 2024-0206-E in its entirety through that incorporation, except for any differences identified as exceptions in the regulatory text of this AD. Using common terms that are the same as the heading of a particular section in EASA AD 2024-0206-E does not mean that operators need comply only with that section. For example, where the AD requirement refers to “all required actions and compliance times,” compliance with this AD requirement is not limited to the section titled “Required Action(s) and Compliance Time(s)” in EASA AD 2024-0206-E. Material required by EASA AD 2024-0206-E for compliance will be available at                     *regulations.gov*                     under Docket No. FAA-2024-2669 after this AD is published.                

## Interim Action

                    The FAA considers that this AD is an interim action. If final action is later identified, the FAA might consider further rulemaking then.                          ( print page 22)    

## Justification for Immediate Adoption and Determination of the Effective Date

                    Section 553(b) of the Administrative Procedure Act (APA) (5 U.S.C. 551*et seq.*) authorizes agencies to dispense with notice and comment procedures for rules when the agency, for “good cause,” finds that those procedures are “impracticable, unnecessary, or contrary to the public interest.” Under this section, an agency, upon finding good cause, may issue a final rule without providing notice and seeking comment prior to issuance. Further, section 553(d) of the APA authorizes agencies to make rules effective in less than thirty days, upon a finding of good cause.                

An unsafe condition exists that requires the immediate adoption of this AD without providing an opportunity for public comments prior to adoption. The FAA has found that the risk to the flying public justifies forgoing notice and comment prior to adoption of this rule because the affected components are part of an assembly that is critical to the control of a helicopter. The FAA has no information pertaining to the extent of excessive axial play of the rotating scissors spherical bearings that may currently exist in helicopters or how quickly degradation may occur. Additionally, this is a newer model helicopter, and this excessive axial play of the rotating scissors spherical bearings is considered early for the parts. Accordingly, the initial actions required by this AD must be accomplished within 15 hours time-in-service or 30 days, whichever occurs first, and depending on the results, taking corrective action and reporting results for up to two inspections for anticipated further analysis. Accordingly, notice and opportunity for prior public comment are impracticable and contrary to the public interest pursuant to 5 U.S.C. 553(b).

In addition, the FAA finds that good cause exists pursuant to 5 U.S.C. 553(d) for making this amendment effective in less than 30 days, for the same reasons the FAA found good cause to forgo notice and comment.

## Regulatory Flexibility Act

The requirements of the Regulatory Flexibility Act (RFA) do not apply when an agency finds good cause pursuant to 5 U.S.C. 553 to adopt a rule without prior notice and comment. Because the FAA has determined that it has good cause to adopt this rule without prior notice and comment, RFA analysis is not required.

## Costs of Compliance

The FAA estimates that this AD affects 11 helicopters of U.S. registry. Labor rates are estimated at $85 per work-hour. Based on these numbers, the FAA estimates the following costs to comply with this AD.

Measuring the axial play of the two rotating scissors spherical bearings takes 2 work-hours for a cost of $170 per helicopter and $1,870 for the U.S fleet. Reporting the results takes 1 work-hour for $85 per helicopter and up to $935 for the U.S. fleet, per reporting instance.

If required, replacing a rotating scissors spherical bearing takes 2 work-hours for a cost of $170 and parts cost $1,270, for an estimated cost of $1,440 per bearing.

## Paperwork Reduction Act

A federal agency may not conduct or sponsor, and a person is not required to respond to, nor shall a person be subject to a penalty for failure to comply with a collection of information subject to the requirements of the Paperwork Reduction Act unless that collection of information displays a currently valid OMB Control Number. The OMB Control Number for this information collection is 2120-0056. Public reporting for this collection of information is estimated to take approximately 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. All responses to this collection of information are mandatory. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to: Information Collection Clearance Officer, Federal Aviation Administration, 10101 Hillwood Parkway, Fort Worth, TX 76177-1524.

## 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

This AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government.

For the reasons discussed above, I certify that this AD:

(1) Is not a “significant regulatory action” under Executive Order 12866, and

(2) Will not affect intrastate aviation in Alaska.

# List of Subjects in 14 CFR Part 39

      - Air transportation
      - Aircraft
      - Aviation safety
      - Incorporation by reference
      - Safety

## The Amendment

Accordingly, under the authority delegated to me by the Administrator, the FAA amends 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

2. The FAA amends § 39.13 by adding the following new airworthiness directive: 

**2024-26-01 Airbus Helicopters:**                             Amendment 39-22915; Docket No. FAA-2024-2669; Project Identifier MCAI-2024-00660-R.                        

## (a) Effective Date

This airworthiness directive (AD) is effective January 17, 2025.

## (b) Affected ADs

None.

## (c) Applicability

This AD applies to Airbus Helicopters Model H160-B helicopters, certificated in any category.

## (d) Subject

Joint Aircraft System Component (JASC) Code 6230, Main Rotor Mast/Swashplate.

## (e) Unsafe Condition

                            This AD was prompted by a report of excessive axial play of the rotating scissors spherical bearings. The FAA is issuing this AD to address excessive axial play of the rotating scissors spherical bearings. The unsafe condition, if not addressed, could result in reduced control of the helicopter.                                  ( print page 23)    

## (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 European Union Aviation Safety Agency Emergency AD 2024-0206-E, dated October 22, 2024 (EASA AD 2024-0206-E).

## (h) Exceptions to EASA AD 2024-0206-E

(1) Where EASA AD 2024-0206-E requires compliance in terms of flight hours, this AD requires using hours time-in-service.

(2) Where EASA AD 2024-0206-E refers to its effective date, this AD requires using the effective date of this AD.

(3) Paragraph (5) EASA AD 2024-0206-E specifies to report inspection results to AH [Airbus Helicopters] within certain compliance times. For this AD, report inspection results at the applicable times specified in paragraph (h)(3)(i) or (ii) of this AD.

(i) For an inspection done on or after the effective date of this AD: Submit the report within 7 days after the inspection.

(ii) For an inspection done before the effective date of this AD: Submit the report within 7 days after the effective date of this AD.

(4) This AD does not adopt the “Remarks” section of EASA AD 2024-0206-E.

## (i) Special Flight Permits

Special flight permits are prohibited.

## (j) Alternative Methods of Compliance (AMOCs)

                            (1) 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 local Flight Standards District Office, as appropriate. If sending information directly to the manager of the International Validation Branch, send it to the attention of the person identified in paragraph (k) of this AD and email to:                             *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.

## (k) Additional Information

                            For more information about this AD, contact Michael Mueller, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: (847) 294-7543; email:                             *Michael.J.Mueller@faa.gov.*

## (l) 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 the AD specifies otherwise.

(i) European Union Aviation Safety Agency (EASA) Emergency AD 2024-0206-E, dated October 22, 2024.

(ii) [Reserved]

                            (3) For EASA material identified in this AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; phone: +49 221 8999 000; email:                             *ADs@easa.europa.eu;*                             website:                             *easa.europa.eu.*                             You may find the EASA material on the EASA website at                             *ad.easa.europa.eu.*

(4) You may view this material at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Parkway, Room 6N-321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call (817) 222-5110.

                            (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 December 17, 2024.

Victor Wicklund,

Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service.

[FR Doc. 2024-31510 Filed 12-30-24; 11:15 am]

BILLING CODE 4910-13-P