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Federal Register / Vol. 86, No. 55 / Wednesday, March 24, 2021 / Rules and Regulations 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.
Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:

1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.
Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:

20210610 The Boeing Company:
Amendment 3921477; Docket No.
FAA20200785; Product Identifier 2020NM063AD.
a Effective Date This airworthiness directive AD is effective April 28, 2021.
b Affected ADs
khammond on DSKJM1Z7X2PROD with RULES

None.
c Applicability This AD applies to all The Boeing Company airplanes, certificated in any category, identified in paragraphs c1 and 2 of this AD.

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15:49 Mar 23, 2021

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d Subject Air Transport Association ATA of America Code 28, Fuel.
e Unsafe Condition This AD was prompted by a report of an un-commanded fuel transfer between the main and center fuel tanks. The FAA is issuing this AD to address multiple refuel valves failed in the open position via Master Minimum Equipment List MMEL
dispatch allowance, which allows uncommanded fuel transfer between fuel tanks.
This condition could result in a fuel exhaustion event.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Conditions for Prohibited Operation No later than 60 days after the effective date of this AD: Operation of an airplane with any inoperative refuel valve fueling shut-off valve of the reserve tank on Model 747 series airplanes only, main tank, or center tank that has failed in the open position is prohibited.
h Minimum Equipment List MEL Items
PART 39AIRWORTHINESS
DIRECTIVES

39.13

1 Model 747100, 100B, 100B SUD, 200B, 200C, 200F, 300, 400, 400D, 400F, 747SR, 747SP, 8F, and 8 series airplanes.
2 Model 767200, 300, 300F, 400ER, and 2C series airplanes.

The MMEL items specified in paragraphs h1 through 5 of this AD are affected by this prohibition and therefore may affect the operators FAA-approved MEL.
1 For Model 747100, 200, and 300
series airplanes: The following Pressure Fueling System items.
i MMEL Item 2820 2, Main Tank 1 and 4 Refueling Valves.
ii MMEL Item 2820 3, Main Tank 2
and 3 Refueling Valves.
iii MMEL Item 2820 4, Center Tank Refueling Valves.
iv MMEL Item 2820 5, Reserve Tank 1 and 4 Refueling Valves.
v MMEL Item 2820 6, Reserve Tank 2
and 3 Refueling Valves.
2 For Model 747400LCF series airplanes:
MMEL Item 28211 1, Refuel Valves, second dispatch case with refueling valves inoperative open.
3 For Model 747400 series airplanes:
MMEL Item 28211 1, Refuel Valves, first dispatch case with refueling valves inoperative open.
4 For Model 7478 series airplanes: The following Refuel Valves items.
i MMEL Item 2821010101A, Refuel Valves.
ii MMEL Item 2821010201A, Refuel Valves.
5 For Model 767 series airplanes except Model 7672C airplanes, for which there is
PO 00000

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no published MMEL: MMEL Item 2821
0101B, Fuel Shutoff Valves.
Note 1 to paragraph h: The MMEL items specified in paragraph h of this AD can be found in the applicable FAA-approved MMEL: Boeing 747 B747100/200/300/SP
SERIES MMEL, Revision 35, dated April 25, 2014; Boeing 747 B747400 LCF MMEL, Revision 3, November 7, 2014; Boeing 747 B
747400, B747400D, B747400F MMEL, Revision 32, dated December 27, 2018;
Boeing 7478 MMEL, Revision 7, dated August 25, 2017; and Boeing 767 MMEL, Revision 39, dated October 26, 2018; which can be found on the Flight Standards Information Management System FSIMS
website, https fsims.faa.gov/PICResults.
aspx?mode=Publication&
doctype=MMELByModel.
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 local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph j of this AD. 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 local flight standards district office/
certificate holding district 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 For more information about this AD, contact Douglas Mansell, Aerospace Engineer, Propulsion Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des Moines, WA 98190; phone and fax: 206231
3875; email: douglas.e.mansell@faa.gov.
k Material Incorporated by Reference None.
Issued on March 12, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202106023 Filed 32321; 8:45 am BILLING CODE 491013P

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