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Federal Register / Vol. 86, No. 178 / Friday, September 17, 2021 / Rules and Regulations The FAA has received no definitive data on which to base the cost estimates for the on-condition repairs specified in this AD.
Authority for This Rulemaking Title 49 of the United States Code specifies the FAAs 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 Agencys 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 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.

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39.13

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

20211809 The Boeing Company:
Amendment 3921710; Docket No.
FAA20210263; Project Identifier AD
202001702T.
a Effective Date This airworthiness directive AD is effective October 22, 2021.
b Affected ADs None.
c Applicability This AD applies to all The Boeing Company Model 777200, 200LR, 300, 300ER, and 777F airplanes, certificated in any category.
d Subject Air Transport Association ATA of America Code 53, Fuselage.
e Unsafe Condition This AD was prompted by a report that an operator found solid rivets with missing heads at the left buttock line 25 on the sloping pressure deck web. The FAA is issuing this AD to address damaged or missing solid rivet heads on the sloping pressure deck web, which could result in loss of sloping pressure deck panels, causing decompression and pressure loss, and loss of the hydraulic systems in the area for wheel brakes both normal and alternate and steering, and potentially leading to runway departure and adversely affecting the structural integrity of the airplane.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions Except as specified by paragraph h of this AD: At the applicable times specified in the Compliance paragraph of Boeing Alert Requirements Bulletin 77753A0093 RB, dated November 24, 2020, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 77753A0093
RB, dated November 24, 2020.
Note 1 to paragraph g: Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 77753A0093, dated November 24, 2020, which is referred to in Boeing Alert Requirements Bulletin 77753A0093 RB, dated November 24, 2020.
h Exceptions to Service Information Specifications 1 Where Boeing Alert Requirements Bulletin 77753A0093 RB, dated November 24, 2020, uses the phrase the original issue date of 77753A0093 RB or the original issue date of Requirements Bulletin 777
53A0093 RB, this AD requires using the effective date of this AD, except where Alert Requirements Bulletin 77753A0093 RB,
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dated November 24, 2020, uses the phrase the original issue date of Requirements Bulletin 77753A0093 RB in a note or flag note.
2 Where Boeing Alert Requirements Bulletin 77753A0093 RB, dated November 24, 2020, specifies contacting Boeing for repair instructions: This AD requires doing the repair using a method approved in accordance with the procedures specified in paragraph i of this AD.
i Alternative Methods of Compliance AMOCs 1 The Manager, Seattle ACO 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 certification office, send it to the attention of the person identified in Related Information.
Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov.
2 Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office.
3 An AMOC that provides an acceptable level of safety may be used for any repair, modification, or alteration required by this AD if it is approved by The Boeing Company Organization Designation Authorization ODA that has been authorized by the Manager, Seattle ACO Branch, FAA, to make those findings. To be approved, the repair method, modification deviation, or alteration deviation must meet the certification basis of the airplane, and the approval must specifically refer to this AD.
j Related Information 1 For more information about this AD, contact Luis Cortez, Aerospace Engineer, Airframe Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des Moines, WA
98198; phone and fax: 206 2313958; email:
Luis.A.Cortez-Muniz@faa.gov.
2 Service information identified in this AD that is not incorporated by reference is available at the addresses specified in paragraphs k3 and 4 of this AD.
k 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. 552a and 1 CFR
part 51.
2 You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise.
i Boeing Alert Requirements Bulletin 77753A0093 RB, dated November 24, 2020.
ii Reserved 3 For service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Contractual & Data Services C&DS, 2600 Westminster Blvd., MC 110SK57, Seal Beach, CA 907405600;
telephone 5627971717; internet https
www.myboeingfleet.com.
4 You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th
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