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Federal Register / Vol. 86, No. 42 / Friday, March 5, 2021 / Rules and Regulations 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 Courtney Kronenberger, Aerospace Engineer, Cabin Safety and Environmental Systems Section, FAA, Seattle ACO
Branch, 2200 South 216th St., Des Moines, WA 98198; phone and fax: 206
2313986; email:
Courtney.A.Kronenberger@faa.gov. Any commentary that the FAA receives that is not specifically designated as CBI will be placed in the public docket for this rulemaking.

12811

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 notice and comment, RFA analysis is not required.
Costs of Compliance The FAA estimates that this AD
affects 58 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD:

ESTIMATED COSTS
Action
Labor cost
Deactivation of potable water system

2 work-hours $85 per hour = $170

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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, and 2 Will not affect intrastate aviation in Alaska.

VerDate Sep<11>2014

15:52 Mar 04, 2021

Jkt 253001

List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
Adoption of 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.

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

20210603 The Boeing Company:
Amendment 3921469; Docket No.
FAA20210133; Project Identifier AD
202100234T.
a Effective Date This airworthiness directive AD is effective March 5, 2021.
b Affected ADs None.
c Applicability This AD applies to all The Boeing Company Model 777F series airplanes, certificated in any category.
d Subject Air Transport Association ATA of America Code 38, Water/waste.

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$170

$9,860

e Unsafe Condition This AD was prompted by a report of a water supply line that detached above an electronic equipment EE cooling filter, leading to water intrusion into the forward EE bay. The FAA is issuing this AD to address water entering the EE cooling system via the cooling filter, which can affect multiple EE bay racks and line replaceable units LRUs, resulting in loss of functionality or inaccurate output of critical electrical systems and possible loss of control of the airplane.
Comply with this AD within the compliance times specified, unless already done.
g Deactivation of Potable Water System
Amended

PO 00000

$0

Cost on U.S.
operators
f Compliance

39.13

Cost per product
Parts cost
Sfmt 4700

For the airplanes identified in paragraphs g1 and 2 of this AD: Within 5 days after the effective date of this AD, deactivate the potable water system, in accordance with Boeing Multi Operator Message MOM
MOM21008901B, dated February 26, 2021 MOMMOM21008901B.
1 Line numbers L/Ns 959 and earlier on which the actions specified in Boeing Service Bulletin 777380042 have been accomplished.
2 L/Ns 960 and subsequent.
Note 1 to paragraph g: Guidance on deactivating the potable water system can be found in Boeing 777 Aircraft Maintenance Manual AMM Task 381000040801.
h Installation Prohibition For airplanes not identified in paragraph g of this AD: As of the effective date of this AD, accomplishment of the actions specified in Boeing Service Bulletin 777380042 is prohibited.

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