Document ID: FAA-2020-0854-0001
Agency: faa
Document Type: Proposed Rule
Title: Airworthiness Directives: Airbus SAS Airplanes
Posted Date: 2020-10-01T04:00Z

[Federal Register Volume 85, Number 191 (Thursday, October 1, 2020)]
[Proposed Rules]
[Pages 61889-61892]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-21543]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2020-0854; Project Identifier MCAI-2020-01067-T]
RIN 2120-AA64

Airworthiness Directives; Airbus SAS Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD) 
2020-01-10, which applies to certain Airbus SAS Model A350-941 
airplanes. AD 2020-01-10 requires installing flight control and 
guidance system (FCGS) software (SW) X11 Standard (STD). Since the FAA 
issued AD 2020-01-10, Airbus has developed a modification that forces 
the air generation system (AGS) ram air outlet doors to be flush in 
cases of total engine flameout or loss of the main electrical supply. 
Because of this additional modification, certain airplanes that were 
excluded from the applicability of AD 2020-01-10 are included in the 
applicability of this proposed AD. This proposed AD would retain the 
requirements of AD 2020-01-10, require modifying the electrical power 
supply of the AGS ram air outlet door actuators, and expand the 
applicability by adding airplanes, as specified in a European Union 
Aviation Safety Agency (EASA) AD, which will be incorporated 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 November 
16, 2020.

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: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.
     Hand Delivery: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590, between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays.
    For the material identified in this proposed AD that will be 
incorporated by reference (IBR), 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 material at the FAA, call 206-
231-3195. It is also available in the AD docket on the internet at 
https://www.regulations.gov by searching for and locating Docket No. 
FAA-2020-0854.

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. FAA-2020-
0854; 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. Comments will be 
available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Kathleen Arrigotti, Aerospace 
Engineer, Large Aircraft Section, International Validation Branch, FAA, 
2200 South 216th St., Des Moines, WA 98198; telephone and fax 206-231-
3218; email Kathleen.Arrigotti@faa.gov.

SUPPLEMENTARY INFORMATION:

Comments Invited

    The FAA invites you to participate in this rulemaking by submitting 
written comments, data, or views about this proposal. The most helpful 
comments reference a specific portion of the proposal, explain the 
reason for any recommended change, and include supporting data. To 
ensure the docket does not contain duplicate comments, commenters 
should send only one copy of written comments, or if comments are filed 
electronically, commenters should submit only one time. Send your 
comments to an address listed under the ADDRESSES section. Include 
``Docket No. FAA-2020-0854; Project Identifier

[[Page 61890]]

MCAI-2020-01067-T'' at the beginning of your 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, as well 
as a report summarizing each substantive public contact with FAA 
personnel concerning this proposed rulemaking. Before acting on this 
proposal, the FAA will consider all comments received by the closing 
date for comments. The FAA will consider comments filed after the 
comment period has closed if it is possible to do so without incurring 
expense or delay. The FAA may change this NPRM because of those 
comments.

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 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 the 
person identified in the FOR FURTHER INFORMATION CONTACT section. Any 
commentary that the FAA receives which is not specifically designated 
as CBI will be placed in the public docket for this rulemaking.

Discussion

    The FAA issued AD 2020-01-10, Amendment 39-19816 (85 FR 6747, 
February 6, 2020) (``AD 2020-01-10''), which applies to certain Airbus 
SAS Model A350-941 airplanes. AD 2020-01-10 requires installing FCGS SW 
X11 STD. The FAA issued AD 2020-01-10 to address ram air turbine (RAT) 
performance that may be below the expected (certificated) level when 
the landing gear is extended. This condition, if not corrected, could 
lead to partial or total loss of RAT electrical power generation when 
the RAT is deployed in an emergency situation, possibly resulting in 
reduced control of the airplane.

Actions Since AD 2020-01-10 Was Issued

    Since the FAA issued AD 2020-01-10, Airbus has developed a 
modification that forces the AGS ram air outlet doors to be flush in 
cases of total engine flameout or loss of the main electrical supply. 
Because of this additional modification, certain airplanes that were 
excluded from the applicability of AD 2020-01-10 are included in the 
applicability of this proposed AD.
    The EASA, which is the Technical Agent for the Member States of the 
European Union, has issued EASA AD 2020-0167, dated July 27, 2020 
(``EASA AD 2020-0167'') (also referred to as the Mandatory Continuing 
Airworthiness Information, or ``the MCAI''), to correct an unsafe 
condition for certain Airbus A350-941 airplanes. EASA AD 2020-0167 
supersedes EASA AD 2019-0203 (which corresponds to FAA AD 2020-01-10).
    This proposed AD was prompted by a determination through testing 
that RAT performance may be below the expected (certificated) level 
when the landing gear is extended, and by the development of a 
modification that forces the AGS ram air outlet doors to be flush in 
cases of total engine flameout or loss of the main electrical supply. 
The FAA is proposing this AD to address RAT performance that may be 
below the expected (certificated) level when the landing gear is 
extended, which could lead to partial or total loss of RAT electrical 
power generation when the RAT is deployed in an emergency situation, 
possibly resulting in reduced control of the airplane. See the MCAI for 
additional background information.

Explanation of Retained Requirements

    Although this proposed AD does not explicitly restate the 
requirements of AD 2020-01-10, this proposed AD would retain all of the 
requirements of AD 2020-01-10. Those requirements are referenced in 
EASA AD 2020-0167, which, in turn, is referenced in paragraph (g) of 
this proposed AD.

Related IBR Material Under 1 CFR Part 51

    EASA AD 2020-0167 describes procedures for installing FCGS SW X11 
STD and for modifying the electrical power supply of the AGS ram air 
outlet door actuators. 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.

FAA's 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 FAA's 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 2020-0167 described previously, as incorporated by 
reference, except for any differences identified as exceptions in the 
regulatory text of this AD.

Explanation of Required Compliance Information

    In the FAA's ongoing efforts to improve the efficiency of the AD 
process, the FAA initially worked with Airbus and EASA to develop a 
process to use certain EASA ADs as the primary source of information 
for compliance with requirements for corresponding FAA ADs. The FAA has 
since coordinated with other manufacturers and civil aviation 
authorities (CAAs) to use this process. As a result, EASA AD 2020-0167 
will be incorporated by reference in the FAA final rule. This proposed 
AD would, therefore, require compliance with EASA AD 2020-0167 in its 
entirety, through that incorporation, except for any differences 
identified as exceptions in the regulatory text of this proposed AD. 
Using common terms that are the same as the heading of a particular 
section in the EASA AD does not mean that operators need comply only 
with that section. For example, where the AD requirement refers to 
``all required actions and compliance times,'' compliance with this AD 
requirement is not limited to the section titled ``Required Action(s) 
and Compliance Time(s)'' in the EASA AD. Service information specified 
in EASA AD 2020-0167 that is required for compliance with EASA AD 2020-
0167 will be available on the internet at https://www.regulations.gov 
by searching for and locating Docket No. FAA-2020-0854 after the FAA 
final rule is published.

[[Page 61891]]

Costs of Compliance

    The FAA estimates that this proposed AD affects 13 airplanes of 
U.S. registry. The FAA estimates the following costs to comply with 
this proposed AD:

                                      Estimated Costs for Required Actions
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                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
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Retained actions from AD 2020-01-10...  8 work-hours x $85 per            $4,650          $5,330         $69,290
                                         hour = $680.
New proposed actions..................  8 work-hours x $85 per             1,950           2,630          34,190
                                         hour = $680.
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    According to the manufacturer, some or all of the costs of this 
proposed AD may be covered under warranty, thereby reducing the cost 
impact on affected individuals. The FAA does not control warranty 
coverage for affected individuals. As a result, the FAA has included 
all known costs in the cost estimate.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's 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 Agency's 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

    The FAA determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would 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 this proposed 
regulation:
    (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 Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

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

Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by removing Airworthiness Directive (AD) 
2020-01-10, Amendment 39-19816 (85 FR 6747, February 6, 2020), and 
adding the following new AD:

Airbus SAS: Docket No. FAA-2020-0854; Project Identifier MCAI-2020-
01067-T.

(a) Comments Due Date

    The FAA must receive comments by November 16, 2020.

(b) Affected ADs

    This AD replaces AD 2020-01-10, Amendment 39-19816 (85 FR 6747, 
February 6, 2020) (``AD 2020-01-10'').

(c) Applicability

    This AD applies to Airbus SAS Model A350-941 airplanes, 
certificated in any category, as identified in European Union 
Aviation Safety Agency (EASA) AD 2020-0167, dated July 27, 2020 
(``EASA AD 2020-0167'').

(d) Subject

    Air Transport Association (ATA) of America Code 21, Air 
Conditioning; and 42, Flight Control and Guidance System.

(e) Reason

    This AD was prompted by a determination through testing that ram 
air turbine (RAT) performance may be below the expected 
(certificated) level when the landing gear is extended, and by the 
development of a modification that forces the air generation system 
(AGS) ram air outlet doors to be flush in cases of total engine 
flameout or loss of the main electrical supply. The FAA is issuing 
this AD to address RAT performance that may be below the expected 
(certificated) level when the landing gear is extended, which could 
lead to partial or total loss of RAT electrical power generation 
when the RAT is deployed in an emergency situation, possibly 
resulting in reduced control of the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Requirements

    Except as specified in paragraph (h) of this AD: Comply with all 
required actions and compliance times specified in, and in 
accordance with, EASA AD 2020-0167.

(h) Exceptions to EASA AD 2020-0167

    (1) Where EASA AD 2020-0167 refers to its effective date, this 
AD requires using the effective date of this AD.
    (2) Where EASA AD 2020-0167 refers to September 3, 2019 (the 
effective date of EASA AD 2019-0203), this AD requires using March 
12, 2020 (the effective date of AD 2020-01-10).
    (3) The ``Remarks'' section of EASA AD 2020-0167 does not apply 
to this AD.

(i) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, 
Large Aircraft Section, International Validation 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 Large Aircraft Section, International Validation 
Branch, send it to the attention of the person identified in 
paragraph (j)(2) of this AD. Information may be emailed to: 9-AVS-AIR-730-AMOC@faa.gov. 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.
    (2) Contacting the Manufacturer: For any requirement in this AD 
to obtain instructions from a manufacturer, the instructions must be 
accomplished using a method approved by the Manager, Large Aircraft 
Section,

[[Page 61892]]

International Validation Branch, FAA; or EASA; or Airbus SAS's EASA 
Design Organization Approval (DOA). If approved by the DOA, the 
approval must include the DOA-authorized signature.
    (3) Required for Compliance (RC): For any service information 
referenced in EASA AD 2020-0167 that contains RC procedures and 
tests: Except as required by paragraph (i)(2) of this AD, RC 
procedures and tests must be done to comply with this AD; any 
procedures or tests that are not identified as RC are recommended. 
Those procedures and tests that are not identified as RC may be 
deviated from using accepted methods in accordance with the 
operator's maintenance or inspection program without obtaining 
approval of an AMOC, provided the procedures and tests identified as 
RC can be done and the airplane can be put back in an airworthy 
condition. Any substitutions or changes to procedures or tests 
identified as RC require approval of an AMOC.

(j) Related Information

    (1) For information about EASA AD 2020-0167, 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 EASA AD on the EASA website at https://ad.easa.europa.eu. You may view this material at the FAA, 
Airworthiness Products Section, Operational Safety Branch, 2200 
South 216th St., Des Moines, WA. For information on the availability 
of this material at the FAA, call 206-231-3195. This material may be 
found in the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-
2020-0854.
    (2) For more information about this AD, contact Kathleen 
Arrigotti, Aerospace Engineer, Large Aircraft Section, International 
Validation Branch, FAA, 2200 South 216th St., Des Moines, WA 98198; 
telephone and fax 206 231 3218; email Kathleen.Arrigotti@faa.gov.

    Issued on September 23, 2020.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2020-21543 Filed 9-30-20; 8:45 am]
BILLING CODE 4910-13-P