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Federal Register / Vol. 86, No. 33 / Monday, February 22, 2021 / Proposed Rules DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20201184; Project Identifier MCAI202001425T
RIN 2120AA64

Airworthiness Directives; ATRGIE
Avions de Transport Regional Airplanes Federal Aviation Administration FAA, DOT.
ACTION: Notice of proposed rulemaking NPRM.
AGENCY:

The FAA proposes to adopt a new airworthiness directive AD for certain ATRGIE Avions de Transport Regional Model ATR72212A airplanes.
This proposed AD was prompted by a report of an engine electrical control 1
fault during flight caused by chafing damage on an electrical harness bundle.
This proposed AD would require modifying the electrical harness routes and de-icing pipe coupling installations, as specified in a European Union Aviation Safety Agency EASA AD, which is proposed for incorporation by reference. The FAA is proposing this AD to address the unsafe condition on these products.
DATES: The FAA must receive comments on this proposed AD by April 8, 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, M
30, 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 that will be incorporated by reference IBR in this AD, contact the EASA, Konrad-Adenauer-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
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SUMMARY:

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material at the FAA, call 2062313195.
It is also available in the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA2020
1184.
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. FAA2020
1184; 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 NPRM, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT:
Shahram Daneshmandi, Aerospace Engineer, Large Aircraft Section, International Validation Branch, FAA, 2200 South 216th St., Des Moines, WA
98198; phone and fax: 2062313220;
email: shahram.daneshmandi@faa.gov.
SUPPLEMENTARY INFORMATION:
Comments Invited The FAA invites you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under ADDRESSES. Include Docket No.
FAA20201184; Project Identifier MCAI202001425T at the beginning 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.
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 NPRM
contain commercial or financial information that is customarily treated as private, that you actually treat as private, and that is relevant or
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responsive to this NPRM, 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 NPRM. Submissions containing CBI
should be sent to Shahram Daneshmandi, Aerospace Engineer, Large Aircraft Section, International Validation Branch, FAA, 2200 South 216th St., Des Moines, WA 98198;
phone and fax: 2062313220; email:
shahram.daneshmandi@faa.gov. Any commentary that the FAA receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking.
Background The EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD
20200227, dated October 19, 2020
EASA AD 20200227 also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition for certain ATRGIE Avions de Transport Regional Model ATR72212A
airplanes.
This proposed AD was prompted by a report of an engine electrical control 1 fault during flight caused by damage on an electrical harness bundle. It was determined that this event was due to the bundle chafing with an air duct clamp located behind the overhead bins in fuselage zone 253. Investigation revealed that the chafing damage was due to insufficient length between the air duct clamp and the harness bundle, leading to tension in the wire sheath.
The FAA is proposing this AD to address such damage, which could result in wire failure and a short circuit, an uncontrolled fire, and consequent loss of multiple systems, possibly resulting in reduced controllability of the airplane. See the MCAI for additional background information.
Related Service Information Under 1
CFR Part 51
EASA AD 20200227 describes procedures for modifying the installation of the electrical harness routes 1M and 1S1V, and rotating the de-icing pipe coupling installation. 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.

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