[Federal Register Volume 85, Number 155 (Tuesday, August 11, 2020)]
[Proposed Rules]
[Pages 48480-48482]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-17466]


 ========================================================================
 Proposed Rules
                                                 Federal Register
 ________________________________________________________________________
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 This section of the FEDERAL REGISTER contains notices to the public of 
 the proposed issuance of rules and regulations. The purpose of these 
 notices is to give interested persons an opportunity to participate in 
 the rule making prior to the adoption of the final rules.
 
 ========================================================================
 

  Federal Register / Vol. 85, No. 155 / Tuesday, August 11, 2020 / 
Proposed Rules  

[[Page 48480]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2020-0683; Product Identifier 2020-NM-109-AD]
RIN 2120-AA64


Airworthiness Directives; Airbus Canada Limited Partnership (Type 
Certificate Previously Held by C Series Aircraft Limited Partnership 
(CSALP); Bombardier, Inc.) Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) 
for certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-
500-1A11 airplanes. This proposed AD was prompted by a report that 
during installation on the final assembly line, a foreign object damage 
(FOD) protective end cap was not removed from an extraction duct of the 
crew oxygen system. The protective end cap must be removed to prevent a 
build-up of oxygen under the flight deck floor, which is a fire risk. 
This proposed AD would require inspecting the air extraction duct 
installation to determine if a protective end cap is installed, and 
removing any protective end cap found. 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 September 
25, 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: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    For service information identified in this NPRM, contact Airbus 
Canada Limited Partnership, 13100 Henri-Fabre Boulevard, Mirabel, 
Qu[eacute]bec, J7N 3C6, Canada; telephone 450-476-7676; email 
a220_crc@abc.airbus; internet https://a220world.airbus.com. You may 
view this service information 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.

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-
0683; 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: Siddeeq Bacchus, Aerospace Engineer, 
Mechanical Systems and Admin Services Section, FAA, New York ACO 
Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone: 
516-228-7362; fax: 516-794-5531; email: 9-avs-nyaco-cos@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 the ADDRESSES section. Include ``Docket No. FAA-2020-0683; 
Product Identifier 2020-NM-109-AD'' at the beginning of your comments. 
The FAA specifically invites comments on the overall regulatory, 
economic, environmental, and energy aspects of this NPRM. The FAA will 
consider all comments received by the closing date and may amend this 
NPRM because of those comments.
    The FAA will post all comments received, without change, to https://www.regulations.gov, including any personal information you provide. 
The FAA will also post a report summarizing each substantive verbal 
contact received about this NPRM.

Discussion

    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued Canadian AD CF-2020-19, dated May 26, 
2020 (referred to after this as the Mandatory Continuing Airworthiness 
Information, or ``the MCAI''), to correct an unsafe condition for 
certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-
1A11 airplanes. You may examine the MCAI in the AD docket on the 
internet at https://www.regulations.gov by searching for and locating 
Docket No. FAA-2020-0683.
    This proposed AD was prompted by a report that during installation 
on the final assembly line, an FOD protective end cap was not removed 
from an extraction duct of the crew oxygen system located under the 
flight deck floor. The crew oxygen lines, electrical harnesses and 
electrical equipment, which operate at a high temperature, are also 
located under the flight deck floor. The extraction duct provides 
ventilation to adjacent electrical equipment and prevents a build-up of 
oxygen should an oxygen leak occur. The protective end cap must be 
removed to prevent a build-up of oxygen under the flight deck floor, 
which is a fire risk. The FAA is proposing this AD to address this 
possible ignition source, which could result in an oxygen-fed fire. See 
the MCAI for additional background information.

Related Service Information Under 1 CFR Part 51

    Airbus Canada Limited Partnership has issued A220 Service Bulletin 
BD500-351004, Issue 001, dated April 8, 2020. This service information 
describes procedures for a general visual inspection of the extraction 
duct of the crew oxygen system to determine if a protective end cap is 
installed, and removing any protective end cap found.
    This service information 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.

[[Page 48481]]

FAA's Determination

    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 
and service information referenced above. The FAA is proposing this AD 
because the FAA evaluated all the relevant information and determined 
the unsafe condition described previously is likely to exist or develop 
on other products of the same type design.

Proposed Requirements of This NPRM

    This proposed AD would require accomplishing the actions specified 
in the service information described previously.

Costs of Compliance

    The FAA estimates that this proposed AD affects 20 airplanes of 
U.S. registry. The FAA estimates the following costs to comply with 
this proposed AD:

                                      Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
                                                                                    Cost per       Cost on U.S.
                          Labor cost                              Parts cost        product         operators
----------------------------------------------------------------------------------------------------------------
3 work-hours x $85 per hour = $255...........................              $0             $255           $5,100
----------------------------------------------------------------------------------------------------------------

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 adding the following new airworthiness 
directive (AD):

Airbus Canada Limited Partnership (Type Certificate previously held 
by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.): 
Docket No. FAA-2020-0683; Product Identifier 2020-NM-109-AD.

(a) Comments Due Date

    The FAA must receive comments by September 25, 2020.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Airbus Canada Limited Partnership (Type 
Certificate previously held by C Series Aircraft Limited Partnership 
(CSALP); Bombardier, Inc.) airplanes, certificated in any category, 
identified in paragraphs (c)(1) and (2) of this AD.
    (1) Model BD-500-1A10 airplanes, serial numbers 50010 through 
50018 inclusive, and 50020 through 50039 inclusive.
    (2) Model BD-500-1A11 airplanes, serial numbers 55003 through 
55016 inclusive, and 55018 through 55054 inclusive.

(d) Subject

    Air Transport Association (ATA) of America Code 35, Oxygen.

(e) Reason

    This AD was prompted by a report that during installation on the 
final assembly line, a foreign object damage (FOD) protective end 
cap was not removed from an extraction duct of the crew oxygen 
system. The protective end cap must be removed to prevent a build-up 
of oxygen under the flight deck floor, which is a fire risk. The FAA 
is issuing this AD to address this possible ignition source, which 
could result in an oxygen-fed fire.

(f) Compliance

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

(g) Inspection

    Within 1,650 flight hours or 8 months after the effective date 
of this AD, whichever occurs first: Do a general visual inspection 
of the air extraction duct installation to determine if a protective 
end cap is installed, and if installed, remove the protective end 
cap before further flight, in accordance with the Accomplishment 
Instructions of Airbus Canada Limited Partnership A220 Service 
Bulletin BD500-351004, Issue 001, dated April 8, 2020.

(h) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York 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 ATTN: Program Manager, Continuing Operational 
Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7300; fax 516-794-5531. 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

[[Page 48482]]

from a manufacturer, the instructions must be accomplished using a 
method approved by the Manager, New York ACO Branch, FAA; or 
Transport Canada Civil Aviation (TCCA); or Airbus Canada Limited 
Partnership's TCCA Design Approval Organization (DAO). If approved 
by the DAO, the approval must include the DAO-authorized signature.

(i) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) Canadian AD CF-2020-19, dated May 26, 2020; for related 
information. This MCAI may be found in the AD docket on the internet 
at https://www.regulations.gov by searching for and locating Docket 
No. FAA-2020-0683.
    (2) For more information about this AD, contact Siddeeq Bacchus, 
Aerospace Engineer, Mechanical Systems and Admin Services Section, 
FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, 
NY 11590; telephone: 516-228-7362; fax: 516-794-5531; email: 9-avs-nyaco-cos@faa.gov.
    (3) For service information identified in this AD, contact 
Airbus Canada Limited Partnership, 13100 Henri-Fabre Boulevard, 
Mirabel, Qu[eacute]bec, J7N 3C6, Canada; telephone 450-476-7676; 
email a220_crc@abc.airbus; internet http://a220world.airbus.com. You 
may view this service information 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.

    Issued on July 30, 2020.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2020-17466 Filed 8-10-20; 8:45 am]
BILLING CODE 4910-13-P


