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Federal Register / Vol. 86, No. 97 / Friday, May 21, 2021 / Proposed Rules
jbell on DSKJLSW7X2PROD with PROPOSALS

of your comments. The most helpful comments reference a specific portion of the proposal, explain the reason for any recommended change, and include supporting data. The FAA will consider all comments received by the closing date and may amend the proposal because of those comments.
Except for Confidential Business Information CBI as described in the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to https
www.regulations.gov, including any personal information you provide. The agency will also post a report summarizing each substantive verbal contact received about this proposed AD.

2105 to address fuel pump erosion caused by cavitation. If this condition is not addressed, a pump running dry could result in a fuel tank explosion and consequent loss of the airplane.

Actions Since AD 20202105 Was Issued Since the FAA issued AD 202021
05, it has been determined, through an assessment of inspection results, that the flight cycles accumulated by an affected part, when installed at a certain location, must also be considered, and certain compliance times need to be revised accordingly. In addition, Model A330841 airplanes have been found to be subject to the unsafe condition.
EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 20200283, Confidential Business Information dated December 17, 2020; corrected December 24, 2020 EASA AD 2020
CBI is commercial or financial information that is both customarily and 0283 also referred to as the Mandatory Continuing Airworthiness Information, actually treated as private by its owner.
or the MCAI, to correct an unsafe Under the Freedom of Information Act condition for all Airbus A330201, FOIA 5 U.S.C. 552, CBI is exempt A330202, A330203, A330223, A330
from public disclosure. If your 223F, A330243, A330243F, A330
comments responsive to this NPRM
contain commercial or financial 301, A330302, A330303, A330321, information that is customarily treated A330322, A330323, A330341, A330
as private, that you actually treat as 342, A330343, A330743L, A330841, private, and that is relevant or A330941, A340211, A340212, A340
responsive to this NPRM, it is important 213, A340311, A340312, A340313, that you clearly designate the submitted A340541, A340542, A340642 and comments as CBI. Please mark each A340643 airplanes. EASA AD 2020
page of your submission containing CBI 0283 supersedes EASA AD 2019
as PROPIN. The FAA will treat such 0291R1 which corresponds to FAA AD
marked submissions as confidential 20202105. Model A330743L, A340
under the FOIA, and they will not be 542, and A340643 airplanes are not placed in the public docket of this certificated by the FAA and are not NPRM. Submissions containing CBI
included on the U.S. type certificate should be sent to Vladimir Ulyanov, data sheet; this AD therefore does not Aerospace Engineer, Large Aircraft include those airplanes in the Section, International Validation applicability.
This proposed AD was prompted by Branch, FAA, 2200 South 216th St., Des reports of a fuel pump showing Moines, WA 98198; telephone and fax 2062313229; email vladimir.ulyanov@ cavitation erosion that breached the fuel pump housing through the inlet webs faa.gov. Any commentary that the FAA
and exposed the fuel pump power receives which is not specifically supply wires, and a determination that designated as CBI will be placed in the certain compliance times need to be public docket for this rulemaking.
revised and that additional airplanes are Background subject to the unsafe condition. The The FAA issued AD 20202105, FAA is proposing this AD to address Amendment 3921278 85 FR 64963, fuel pump erosion caused by cavitation.
October 14, 2020 AD 20202105, If this condition is not addressed, a which applies to all Airbus SAS Model pump running dry could result in a fuel A330200 Freighter, A330200, A330
tank explosion and consequent loss of 300, A330900, A340200, A340300, the airplane. See the MCAI for A340500 and A340600 series additional background information.
airplanes. AD 20202105 requires Explanation of Retained Requirements repetitive inspections of certain fuel Although this proposed AD does not pumps for cavitation erosion, replacement if necessary, revision of the explicitly restate the requirements of AD
operators MEL, and accomplishment of 20202105, this proposed AD would retain all of the requirements of AD
certain maintenance actions related to 20202105. Those requirements are defueling and ground fuel transfer referenced in EASA AD 20200283, operations. The FAA issued AD 2020

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which, in turn, is referenced in paragraph g of this proposed AD.
Related Service Information Under 1
CFR Part 51
EASA AD 20200283 describes procedures for repetitive inspections of all affected parts, replacement if necessary, updating of the applicable Master Minimum Equipment List MMEL, and certain maintenance actions related to defueling and ground fuel transfer operations.
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 and Requirements of This Proposed AD
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 described in the MCAI referenced above. The FAA is proposing this AD
because the FAA evaluated all pertinent information and determined an unsafe condition exists and is likely to exist or develop on other products of the same type design.
Proposed AD Requirements This proposed AD would require accomplishing the actions specified in EASA AD 20200283 described previously, as incorporated by reference, except for any differences identified as exceptions in the regulatory text of this AD.
EASA AD 20200283 requires operators to inform all flight crews of revisions to the MMEL, and thereafter to operate the aeroplane accordingly.
However, this AD would not specifically require those actions as they are already required by FAA
regulations.
FAA regulations 14 CFR
121.628a2 require operators to provide pilots with access to all of the information contained in the operators MEL.
Furthermore, 14 CFR 121.628a5
requires airplanes to be operated under all applicable conditions and limitations contained in the operators MEL.
Therefore, including a requirement in this AD to operate the airplane according to the revised MEL would be redundant and unnecessary. Further, compliance with such a requirement in an AD would be impracticable to demonstrate or track on an ongoing basis; therefore, a requirement to
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