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Federal Register / Vol. 86, No. 119 / Thursday, June 24, 2021 / Rules and Regulations
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resulted in bulging. This AD requires doing a detailed visual inspection to detect any bulging, loose, and missing countersunk fastener heads at the leftLH and right-hand RH outer wing lower skin of the front spar between certain wing stations, and applicable oncondition actions, as specified in a European Union Aviation Safety Agency EASA, which is incorporated by reference. The FAA is issuing this AD
to address the unsafe condition on these products.
DATES: This AD becomes effective July 9, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of July 9, 2021.
The FAA must receive comments on this AD by August 9, 2021.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
Federal eRulemaking Portal: Go to https www.regulations.gov. Follow the instructions for submitting comments.
Fax: 2024932251.
Mail: U.S. Department of Transportation, Docket Operations, M30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
Hand Delivery: Deliver to Mail address above between 9 a.m. and 5
p.m., Monday through Friday, except Federal holidays.
For material incorporated by reference IBR in this AD, contact EASA, KonradAdenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000;
email ADs@easa.europa.eu; internet www.easa.europa.eu. You may find this IBR material on the EASA website at https ad.easa.europa.eu. You may view this IBR material at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 2062313195.
It is also available in the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210448.
Examining the AD Docket You may examine the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0448; 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 AD, any comments received, and other information. The street address for Docket Operations is listed above.

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Tom Rodriguez, Aerospace Engineer, Large Aircraft Section, International Validation Branch, FAA, 2200 South 216th St., Des Moines, WA 98198;
telephone and fax 2062313226; email Tom.Rodriguez@faa.gov.
SUPPLEMENTARY INFORMATION:
FOR FURTHER INFORMATION CONTACT:

Background EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 20210014, dated January 13, 2021 EASA AD
20210014 also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition for all Fokker Services B.V. Model F28 Mark 0070 and 0100
airplanes.
This AD was prompted by a report that corrosion was found on the horizontal flange on the front spar lower boom, between the rebate strap and the lower boom, and resulted in bulging.
The FAA is issuing this AD to address corrosion on the horizontal flange, which could lead to reduced structural integrity of the wing torsion box structure. See the MCAI for additional background information.
Related Service Information Under 1
CFR Part 51
EASA AD 20210014 specifies procedures for doing a detailed visual inspection to detect any bulging, loose, and missing countersunk fastener heads at the LH and RH outer wing lower skin of the front spar between wing station WSTA 10110 and WSTA 11190; and applicable on-condition actions. Oncondition actions include repetitive detailed visual inspections of the LH
and RH outer wing lower skin, at the front spar between WSTA 10110 and WSTA 11190, if bulging between 0.5
mm and 3 mm is found; a detailed visual inspection to detect corrosion at the front spar lower boom and rebate strap if any bulging, loose, or missing countersunk fastener head, or bulging in excess of 3 mm, is found; and repair of any corrosion damage. EASA AD 2021
0014 also specifies reporting inspection findings. 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.
FAAs 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 FAAs bilateral agreement with the State of Design Authority, the FAA has been notified of the unsafe condition
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described in the MCAI referenced above. The FAA is issuing this AD
because the FAA evaluated all pertinent information and determined the unsafe condition exists and is likely to exist or develop on other products of the same type design.
Requirements of This AD
This AD requires accomplishing the actions specified in EASA AD 2021
0014 described previously, as incorporated by reference, except for any differences identified as exceptions in the regulatory text of this AD.
Explanation of Required Compliance Information In the FAAs ongoing efforts to improve the efficiency of the AD
process, the FAA developed a process to use certain 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 other manufacturers and CAAs. As a result, EASA AD 2021
0014 is incorporated by reference in this AD. This AD, therefore, requires compliance with EASA AD 20210014
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 20210014 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 Actions and Compliance Times in the EASA AD. Service information specified in EASA AD
20210014 that is required for compliance with it is available at https www.regulations.gov by searching for and locating Docket No.
FAA20210448.
FAAs Justification and Determination of the Effective Date Section 553b3B 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 553d of the APA
authorizes agencies to make rules
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