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###### Department of Transportation

###### Federal Aviation Administration

          - 14 CFR Part 39
          - [Docket No. FAA-2023-1495; Project Identifier MCAI-2023-00492-T; Amendment 39-22564; AD 2023-20-05]
          - RIN 2120-AA64

# AGENCY:

Federal Aviation Administration (FAA), DOT.

# ACTION:

Final rule.

# SUMMARY:

The FAA is superseding Airworthiness Directive (AD) 2020-03-24, which applied to certain Dassault Aviation Model MYSTERE-FALCON 20-C5, 20-D5, 20-E5, and 20-F5 airplanes. AD 2020-03-24 required revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. This AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. This AD continues to require the actions in AD 2020-03-24 and requires revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations 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 November 8, 2023.

The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of November 8, 2023.

The Director of the Federal Register approved the incorporation by reference of a certain other publication listed in this AD as of April 2, 2020 (85 FR 11289, February 27, 2020).

# ADDRESSES:

*AD Docket:*                         You may examine the AD docket at                         *regulations.gov*                         under Docket No. FAA-2023-1495; 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 address for Docket Operations is U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.                    

*Material Incorporated by Reference:*
      - For EASA material incorporated by reference in this AD, 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 material on the EASA website at                          ad.easa.europa.eu. 
      - For Dassault Aviation service information incorporated by reference in this AD, contact Dassault Falcon Jet Corporation, Teterboro Airport, P.O. Box 2000, South Hackensack, NJ 07606; telephone 201-440-6700; website: dassaultfalcon.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. It is also available in the AD docket at regulations.gov                          under Docket No. FAA-2023-1495.                    

# FOR FURTHER INFORMATION CONTACT:

                        Tom Rodriguez, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 206-231-3226; email:                         *tom.rodriguez@faa.gov.*

# SUPPLEMENTARY INFORMATION:

## Background

The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to supersede AD 2020-03-24, Amendment 39-19848 (85 FR 11289, February 27, 2020) (AD 2020-03-24). AD 2020-03-24 applied to certain Dassault Aviation Model MYSTERE-FALCON 20-C5, 20-D5, 20-E5, and 20-F5 airplanes. AD 2020-03-24 required revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. The FAA issued AD 2020-03-24 to address fatigue cracking, damage, and corrosion in principal structural elements, which could result in reduced structural integrity of the airplane. AD 2020-03-24 specifies that accomplishing the revision required by that AD terminates the requirements of paragraph (g)(1) of AD 2010-26-05, Amendment 39-16544 (75 FR 79952, December 21, 2010), for Model MYSTERE-FALCON 20-C5, 20-D5, 20-E5, and 20-F5 airplanes on which the SSIP [Supplemental Structural Inspection Program (Dassault Service Bulletin 730)] has been embodied into the airplane's existing maintenance or inspection program only. This AD therefore continues to allow that terminating action.

                    The NPRM published in the                     **Federal Register**                     on July 19, 2023 (88 FR 46115). The NPRM was prompted by AD 2023-0062, dated March 20, 2023, issued by EASA, (EASA AD 2023-0062) (also referred to as the MCAI), which is the Technical Agent for the Member States of the European Union. The MCAI states that new or more restrictive airworthiness limitations have been developed.                

In the NPRM, the FAA proposed to continue to require the actions in AD 2020-03-24 and proposed to require revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations, as specified in EASA AD 2023-0062. The FAA is issuing this AD to address fatigue cracking, damage, and corrosion in principal structural elements, which could result in reduced structural integrity of the airplane.

                    You may examine the MCAI in the AD docket at                     *regulations.gov*                     under Docket No. FAA-2023-1495.                

## Discussion of Final Airworthiness Directive

## Comments

The FAA received no comments on the NPRM or on the determination of the cost to the public.

## Conclusion

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 referenced above. The FAA reviewed the relevant data and determined that air safety requires adopting this AD as proposed. Accordingly, the FAA is issuing this AD to address the unsafe condition on this product. Except for minor editorial changes, this AD is adopted as proposed in the NPRM. None of the changes will increase the economic burden on any operator.

## Related Service Information Under 1 CFR Part 51

EASA AD 2023-0062 specifies new or more restrictive airworthiness limitations for airplane structures and safe life limits.

This AD also requires Chapter 5-40-01, Airworthiness Limitations, of the Dassault Falcon 20 Retrofit 731 Maintenance Manual, Revision 10, dated January 1, 2019, which the Director of the Federal Register approved for incorporation by reference as of April 2, 2020 (85 FR 11289, February 27, 2020).

                    This material is reasonably available because the interested parties have access to it through their normal course                           ( print page 68455)                        of business or by the means identified in the                     **ADDRESSES**                     section.                

## Costs of Compliance

The FAA estimates that this AD affects 57 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD:

The FAA estimates the total cost per operator for the retained actions from AD 2020-03-24 to be $7,650 (90 work-hours × $85 per work-hour).

The FAA has determined that revising the existing maintenance or inspection program takes an average of 90 work-hours per operator, although the agency recognizes that this number may vary from operator to operator. Since operators incorporate maintenance or inspection program changes for their affected fleet(s), the FAA has determined that a per-operator estimate is more accurate than a per-airplane estimate.

The FAA estimates the total cost per operator for the new actions to be $7,650 (90 work-hours × $85 per work-hour).

## 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,

(2) Will not affect intrastate aviation in Alaska, and

(3) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.

# List of Subjects in 14 CFR Part 39

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

## The 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: 

a. Removing Airworthiness Directive (AD) 2020-03-24, Amendment 39-19848 ( 85 FR 11289, February 27, 2020); and

b. Adding the following new AD: 

**2023-20-05 Dassault Aviation:**                             Amendment 39-22564; Docket No. FAA-2023-1495; Project Identifier MCAI-2023-00492-T.                        

## (a) Effective Date

This airworthiness directive (AD) is effective November 8, 2023.

## (b) Affected ADs

(1) This AD replaces AD 2020-03-24, Amendment 39-19848 (85 FR 11289, February 27, 2020) (AD 2020-03-24).

(2) This AD affects AD 2010-26-05, Amendment 39-16544 (75 FR 79952, December 21, 2010) (AD 2010-26-05).

## (c) Applicability

This AD applies to Dassault Aviation Model MYSTERE-FALCON 20-C5, 20-D5, 20-E5, and 20-F5 airplanes, certificated in any category, on which the Supplemental Structural Inspection Program (SSIP) (Dassault Service Bulletin 730) has been embodied into the airplane's existing maintenance or inspection program.

## (d) Subject

Air Transport Association (ATA) of America Code: 05, Time Limits/Maintenance Checks.

## (e) Unsafe Condition

This AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. The FAA is issuing this AD to address fatigue cracking, damage, and corrosion in principal structural elements, which could result in reduced structural integrity of the airplane.

## (f) Compliance

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

## (g) Retained Revision of the Existing Maintenance or Inspection Program, With No Changes

This paragraph restates the requirements of paragraph (g) of AD 2020-03-24, with no changes. Within 90 days after April 2, 2020 (the effective date of AD 2020-03-24), revise the existing maintenance or inspection program, as applicable, to incorporate the information specified in Chapter 5-40-01, Airworthiness Limitations, of the Dassault Falcon 20 Retrofit 731 Maintenance Manual, Revision 10, dated January 1, 2019. The initial compliance time for doing the tasks is at the applicable time specified in Chapter 5-40-01, Airworthiness Limitations, of the Dassault Falcon 20 Retrofit 731 Maintenance Manual, Revision 10, dated January 1, 2019; or within 90 days after April 2, 2020; whichever occurs later. Accomplishing the revision of the existing maintenance or inspection program required by paragraph (i) of this AD terminates the requirements of this paragraph.

## (h) Retained No Alternative Actions or Intervals, With a New Exception

                            This paragraph restates the requirements of paragraph (h) of AD 2020-03-24, with a new exception. Except as required by paragraph (i) of this AD, after the existing maintenance or inspection program has been revised as required by paragraph (g) of this AD, no alternative actions (                            *e.g.,*                             inspections) or intervals may be used unless the actions or intervals are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (m)(1) of this AD.                        

## (i) New Revision of the Existing Maintenance or Inspection Program

Except as specified in paragraph (j) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency (EASA) AD 2023-0062, dated March 20, 2023 (EASA AD 2023-0062). Accomplishing the revision of the existing maintenance or inspection program required by this paragraph terminates the requirements of paragraph (g) of this AD.

## (j) Exceptions to EASA AD 2023-0062

(1) This AD does not adopt the requirements specified in paragraphs (1) and (2) of EASA AD 2023-0062.

(2) Paragraph (3) of EASA AD 2023-0062 specifies revising “the approved AMP” within 12 months after its effective date, but this AD requires revising the existing maintenance or inspection program, as applicable, within 90 days after the effective date of this AD.

                            (3) The initial compliance time for doing the tasks specified in paragraph (3) of EASA AD 2023-0062 is at the applicable “limitations” and “associated thresholds” as incorporated by the requirements of paragraph (3) of EASA AD 2023-0062 or within 90 days after the effective date of this AD, whichever occurs later.                                  ( print page 68456)    

(4) This AD does not adopt the provisions specified in paragraphs (4) and (5) of EASA AD 2023-0062.

(5) This AD does not adopt the “Remarks” section of EASA AD 2023-0062.

## (k) New Provisions for Alternative Actions and Intervals

                            After the existing maintenance or inspection program has been revised as required by paragraph (i) of this AD, no alternative actions (                            *e.g.,*                             inspections) and intervals are allowed unless they are approved as specified in the provisions of the “Ref. Publications” section of EASA AD 2023-0062.                        

## (l) Terminating Action for AD 2010-26-05

Accomplishing the actions required by paragraph (g) or (i) of this AD terminates the requirements of paragraph (g)(1) of AD 2010-26-05, for Model MYSTERE-FALCON 20-C5, 20-D5, 20-E5, and 20-F5 airplanes on which the SSIP has been embodied into the airplane's existing maintenance or inspection program only.

## (m) 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 International Validation Branch, send it to the attention of the person identified in paragraph (n) 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 Dassault Aviation's EASA Design Organization Approval (DOA). If approved by the DOA, the approval must include the DOA-authorized signature.                        

## (n) Additional Information

                            For more information about this AD, contact Tom Rodriguez, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 206-231-3226; email:                             *tom.rodriguez@faa.gov.*

## (o) Material Incorporated by Reference

(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 service information as applicable to do the actions required by this AD, unless this AD specifies otherwise.

(3) The following service information was approved for IBR on November 8, 2023.

(i) European Union Aviation Safety Agency (EASA) AD 2023-0062, dated March 20, 2023.

(ii) [Reserved]

(4) The following service information was approved for IBR on April 2, 2020 (85 FR 11289, February 27, 2020).

(i) Chapter 5-40-01, Airworthiness Limitations, of the Dassault Falcon 20 Retrofit 731 Maintenance Manual, Revision 10, dated January 1, 2019.

(ii) [Reserved]

                            (5) For EASA AD 2023-0062, 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:                             *ad.easa.europa.eu.*

                            (6) For Dassault Aviation service information identified in this AD, contact Dassault Falcon Jet Corporation, Teterboro Airport, P.O. Box 2000, South Hackensack, NJ 07606; telephone 201-440-6700; website                             *dassaultfalcon.com.*

(7) You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th Street, Des Moines, WA. For information on the availability of this material at the FAA, call 206-231-3195.

                            (8) You may view this service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, email                             *fr.inspection@nara.gov,*                             or go to:                             *www.archives.gov/​federal-register/​cfr/​ibr-locations.html.*

Issued on September 28, 2023.

Victor Wicklund,

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

[FR Doc. 2023-22068 Filed 10-3-23; 8:45 am]

BILLING CODE 4910-13-P