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PROPOSED AD BOMBARDIER, INC. (TYPE CERTIFICATE PREVIOUSLY HELD BY CANADAIR LIMITED): Docket No. FAA-2017-0333; Directorate Identifier 2017-NM-005-AD.
(a) COMMENTS DUE DATE

    We must receive comments by June 23, 2017.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD applies to Bombardier, Inc. (Type Certificate previously  held
    by  Canadair Limited)  Model CL-215-6B11  (CL-415 Variant)  airplanes,
    certificated in any category,  having serial numbers 2001,  2002, 2005
    through 2007 inclusive, 2010, 2012 through 2017 inclusive, 2019,  2022
    through 2024 inclusive, 2026, 2057, 2063, 2065, 2076, 2077, and 2081.

(d) SUBJECT

    Air Transport Association (ATA) of America Code 25, Equipment/Furnish-
    ings.

(e) REASON

    This AD was prompted by a report indicating that an oxygen bottle  was
    found loose while the clamp strap  was in the locked position. We  are
    issuing this AD to prevent an oxygen bottle from being released, which
    would result  in a  loose mass  object in  the cockpit  and could also
    result in  an oxygen-rich  environment that  could lead  to a possible
    fire hazard.

(f) COMPLIANCE

    Comply with this AD within the compliance times specified,  unless al-
    ready done.

(g) INSTALLATION AND MODIFICATION

    Within  12  months  after  the  effective  date  of  this  AD, install
    additional shims  and modify  the clamp  strap, as  applicable, to the
    flight crew's oxygen bottle  retaining structures, in accordance  with
    the  Accomplishment Instructions  of  Bombardier Service Bulletin  215
    -4457, Revision 3, dated May 8, 2013.

(h) CREDIT FOR PREVIOUS ACTIONS

    This paragraph provides credit  for actions required by  paragraph (g)
    of this AD, if those actions were performed before the effective  date
    of  this  AD  using  any  of  the  service  information  identified in
    paragraphs (h)(1), (h)(2), or (h)(3) of this AD.

(1) Bombardier Service Bulletin 215-4457,  Revision 2,  dated  October 24,
    2012.

(2) Bombardier Service Bulletin 215-4457, Revision 1, dated June 12, 2012.

(3) Bombardier Service Bulletin 215-4457, dated April 4, 2012.

(i) OTHER FAA AD PROVISIONS

    The following provisions also apply to this AD:

(1) Alternative Methods of Compliance (AMOCs):  The Manager, New York Air-
    craft Certification Office (ACO),  ANE-170, 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
    ACO, send it to ATTN: Program Manager, Continuing Operational  Safety,
    FAA, New York ACO, 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
    corrective  actions   from  a   manufacturer,  the   action  must   be
    accomplished using  a method  approved by  the Manager,  New York ACO,
    ANE-170, FAA; or Transport Canada Civil Aviation (TCCA); or Viking Air
    Limited's TCCA Design Approval Organization (DAO). If approved by  the
    DAO, the approval must include the DAO-authorized signature.

(j) RELATED INFORMATION

(1) Refer   to   Mandatory  Continuing  Airworthiness  Information  (MCAI)
    Canadian AD CF-2016-33,  dated October 12, 2016,  for related informa-
    tion. This MCAI may be found in the AD docket on the Internet at http:
    //www.regulations.gov by searching for  and  locating  Docket No. FAA-
    2017-0333.

(2) For more information  about this AD,  contact  Cesar Gomez,  Aerospace
    Engineer, Airframe  and Mechanical  Systems Branch,  ANE-171, FAA, New
    York Aircraft Certification Office  (ACO), 1600 Stewart Avenue,  Suite
    410, Westbury, NY 11590; telephone: 516-228-7318; fax: 516-794-5531.

(3) For  service information identified  in this AD,  contact  Bombardier,
    Inc.,  400 Cote-Vertu Road West, Dorval, Quebec H4S 1Y9, Canada; tele-
    phone: 514-855-5000; fax: 514-855-7401; email: thd.crj@aero.bombardier
    .com;  Internet: http://www.bombardier.com.  You may view this service
    information at the FAA, Transport Airplane Directorate, 1601 Lind Ave.
    SW., Renton, WA.  For information on the availability of this material
    at the FAA, call 425-227-1221.

Issued  in  Renton, Washington,  on May 2, 2017.  Michael Kaszycki, Acting
Manager, Transport Airplane Directorate, Aircraft Certification Service.

DATES: We must receive comments on this proposed AD by June 23, 2017.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2017-0333; Directorate Identifier 2017-NM-005-AD]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc. (Type Certificate
Previously Held by Canadair Limited) Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to adopt a new airworthiness directive (AD) for
certain Bombardier, Inc., Model CL-215-6B11 (CL-415 Variant) airplanes.
This proposed AD was prompted by a report indicating that an oxygen
bottle was found loose while the clamp strap was in the locked
position. This proposed AD would require modification of the clamp
strap and installation of additional shims, as applicable, to the
flight crew's oxygen bottle retaining structures. We are proposing this
AD to address the unsafe condition on these products.

DATES: We must receive comments on this proposed AD by June 23, 2017.

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 http://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
Bombardier, Inc., 400 Cote-Vertu Road West, Dorval, Quebec
H4S 1Y9, Canada; telephone: 514-855-5000; fax: 514-855-7401; email:
thd.crj@aero.bombardier.com; Internet: http://www.bombardier.com. You
may view this referenced service information at the FAA, Transport
Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information
on the availability of this material at the FAA, call 425-227-1221.

Examining the AD Docket

You may examine the AD docket on the Internet at http://www.regulations.
gov by searching for and locating Docket No. FAA-2017-0333;
or in person at the Docket Management Facility between 9 a.m. and
5 p.m., Monday through Friday, except Federal holidays. The AD docket
contains this proposed AD, the regulatory evaluation, any comments
received, and other information. The street address for the Docket
Operations office (telephone: 800-647-5527) is in the ADDRESSES
section. Comments will be available in the AD docket shortly after
receipt.

FOR FURTHER INFORMATION CONTACT: Cesar Gomez, Aerospace Engineer,
Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft
Certification Office (ACO), 1600 Stewart Avenue, Suite 410, Westbury,
NY 11590; telephone: 516-228-7318; fax: 516-794-5531.

SUPPLEMENTARY INFORMATION:

Comments Invited

We invite 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-2017-0333;
Directorate Identifier 2017-NM-005-AD" at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of this proposed AD. We
will consider all comments received by the closing date and may amend
this proposed AD based on those comments.

We will post all comments we receive, without change, to http://www.
regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive about this proposed AD.

Discussion

Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian AD CF-2016-33, dated October
12, 2016 (referred to after this as the Mandatory Continuing
Airworthiness Information, or "the MCAI"), to correct an unsafe
condition for certain Bombardier, Inc., Model CL-215-6B11 (CL-415
Variant) airplanes. The MCAI states:

During the implementation of Service Bulletin (SB) 215-4051, the
oxygen bottle was found loose while the clamp strap was in the
locked position. This was determined to be caused by the quick
release latch assembly not achieving the proper clamping pressure.

The release of the oxygen bottle due to improper clamping
pressure may result in a loose mass cockpit hazard or an oxygen rich
environment leading to a possible fire hazard.

In order to mitigate the unsafe condition, SB 215-4457 was
issued to modify the clamp strap and install additional shims to add
strength to the attaching structure for all affected aeroplanes.

You may examine the MCAI in the AD docket on the Internet at http://www.
regulations.gov by searching for and locating Docket No. FAA-2017-0333.

Related Service Information Under 1 CFR Part 51

We reviewed Bombardier Service Bulletin 215-4457, Revision 3, dated
May 8, 2013. The service information describes procedures for
installing shims, and, for certain airplanes, modifying the straps of
the latch assembly, on the flight crew's oxygen bottles' retaining
structure. 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.

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 our bilateral agreement with the State of Design Authority, we have
been notified of the unsafe condition described in the MCAI and service
information referenced above. We are proposing this AD because we
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.

Costs of Compliance

We estimate that this proposed AD affects 26 airplanes of U.S. registry.

We estimate the following costs to comply with this proposed AD:

Estimated Costs

Action
Labor cost
Parts cost
Cost per product
Cost on U.S. operators
Modification and installation 16 work-hours x $85 per hour = $1,360
$2,250
$3,610
$93,860

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.

We are 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 rule-
making action.

Regulatory Findings

We 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. Is not a "significant rule" under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979);

3. Will not affect intrastate aviation in Alaska; and

4. 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

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]

2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive (AD):