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

Airworthiness Directives; Dassault Aviation Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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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
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 x $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 x $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.

Sec. 39.13 [Amended]

2. The FAA amends Sec. 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: