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PROPOSED AD BOMBARDIER, INC.: Docket No. FAA-2022-1654; Project Identifier MCAI-2022-01165-T.
(a) COMMENTS DUE DATE

    The FAA must receive comments on this airworthiness directive (AD)  by
    February 10, 2023.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD applies  to Bombardier, Inc.,  airplanes, certificated in  any
    category, with serial numbers as identified in the service information
    specified in paragraphs (c)(1) through (4) of this AD.

(1) Model  CL-600-1A11 (600)  airplanes:  Bombardier Service Bulletin 600-
    0777, dated December 13, 2021.

(2) Model  CL-600-2A12 (601)  airplanes:  Bombardier Service Bulletin 601-
    1109, Revision 01, dated May 6, 2022.

(3) Model CL-600-2B16 (601-3A, 601-3R) airplanes: Bombardier Service Bull-
    etin 601-1109, Revision 01, dated May 6, 2022.

(4) Model CL-600-2B16 (604) airplanes: Bombardier Service Bulletin 604-35-
    007, Revision 01, dated May 6, 2022.

(d) SUBJECT

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

(e) UNSAFE CONDITION

    This AD was  prompted by reports  of passenger oxygen  mask dispensing
    units installed in the affected  airplanes with lanyards that are  too
    long to meet the proper length specifications of the airplane. The FAA
    is issuing this AD to address the inability to initiate flow of oxygen
    to the mask. The unsafe  condition, if not addressed, could  result in
    no indication to the passenger  that they are not receiving  oxygen in
    an emergency situation.

(f) COMPLIANCE

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

(g) INSPECTION AND REPLACEMENT

    Within 5 years after the effective date of this AD, determine the part
    number of the drop-down oxygen box, in accordance with Section 2.B. of
    the Accomplishment Instructions of the applicable service  information
    identified in paragraphs (c)(1) through (4) of this AD.

(1) If any drop-down oxygen box part number  (P/N)  installed  on the air-
    plane  matches  any P/N  listed  in Table  1  of Section  2.B.  of the
    applicable service  information: Before  further flight,  perform drop
    -down oxygen mask reach testing in accordance with Section 2.B.(2)  of
    the Accomplishment Instructions of the applicable service  information
    identified in paragraphs (c)(1) through (4) of this AD.

(i) If the test result is PASS:  Before further flight,  replace the drop-
    down oxygen box assembly in accordance with Section 2.C., and test the
    passenger oxygen supply system in accordance with Section 2.D.(2),  of
    the  applicable service  information identified  in paragraphs  (c)(1)
    through (4) of this AD.

(ii) If the test result is FAIL  for any individual seat:  Before  further
     flight,  mark  the  failed seat  as  inoperative  in accordance  with
     Section 2.B.(3)  of the  applicable service  information specified in
     paragraphs (c)(1) through (4) of this AD.

(2) If the part number  of any drop-down oxygen box assembly  installed on
    the airplane is not found in Table 1 of Section 2.B. of the applicable
    service information  identified in  paragraphs (c)(1)  through (4)  of
    this  AD: Before  further flight,  do  actions  to correct  the unsafe
    condition using a  method approved in  accordance with the  procedures
    specified in paragraph (i)(1) of this AD.

(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 Bombardier Service Bulletin 601-1109, dated  December
    13, 2021;  or Bombardier  Service Bulletin  604-35-007, dated December
    13, 2021; as applicable.

(i) ADDITIONAL 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
    responsible  Flight  Standards  Office,  as  appropriate.  If  sending
    information directly to the manager  of the New York ACO  Branch, mail
    it to  ATTN: Program  Manager, Continuing  Operational Safety,  at the
    address identified in paragraph (j)(2)  of this AD or email  to: 9-avs
    -nyaco-cos@faa.gov. If mailing information, also submit information by
    email.  Before  using  any  approved  AMOC,  notify  your  appropriate
    principal inspector, or lacking a principal inspector, the manager  of
    the responsible Flight Standards 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,  New York  ACO
    Branch,  FAA; or  Transport Canada;  or  Bombardier,  Inc.'s Transport
    Canada Design Approval Organization (DAO). If approved by the DAO, the
    approval must include the DAO-authorized signature.

(j) ADDITIONAL INFORMATION

(1) Refer to Transport Canada AD CF-2022-50,  dated  August 25, 2022,  for
    related information. This Transport Canada  AD may be found in  the AD
    docket at regulations.gov under Docket No. FAA-2022-1654.

(2) For more information about this AD, contact Elizabeth M Dowling, Aero-
    space Engineer, Mechanical Systems and Administrative Services Section
    FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY
    11590; telephone 516-361-8046; email 9-avs-nyaco-cos@faa.gov.

(k) MATERIAL INCORPORATED BY REFERENCE

(1) The Director of the Federal Register  approved  the  incorporation  by
    reference (IBR) of  the service information  listed in this  paragraph
    under 5 U.S.C. 552(a) and 1 CFR part 51.

(2) You must use this service information as applicable  to do the actions
    required by this AD, unless this AD specifies otherwise.

(i) Bombardier Service Bulletin 600-0777, dated December 13, 2022.

(ii) Bombardier Service Bulletin 601-1109, Revision 01, dated May 6, 2022.

(iii) Bombardier Service Bulletin 604-35-007,  Revision 01,  dated  May 6,
      2022.

(3) For service information identified in this AD, contact Bombardier Bus-
    iness Aircraft  Customer  Response  Center,  400 Cote-Vertu Road West,
    Dorval, Quebec H4S 1Y9, Canada;  telephone 514-855-2999; email ac.yul@
    aero.bombardier.com; website bombardier.com.

(4) You may view this service information at the FAA,  Airworthiness Prod-
    ucts 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.

(5) You may view this service information  that is incorporated  by refer-
    ence at the National Archives and Records Administration  (NARA).  For
    information on the availability  of this material  at NARA,  email fr.
    inspection@nara.gov,  or go to: www.archives.gov/federal-register/cfr/
    ibr-locations.html.

Issued on December 20, 2022. Christina Underwood, Acting Director, Compli-
ance & Airworthiness Division, Aircraft Certification Service.

DATES: The FAA must receive comments  on this proposed AD  by February 10,
2023.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2022-1654; Project Identifier MCAI-2022-01165-T]
RIN 2120-AA64

Airworthiness Directives; 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 Bombardier, Inc., Model CL-600-1A11 (600), CL-600-2A12
(601), and CL-600-2B16 (601-3A, 601-3R, and 604 Variants) airplanes.
This proposed AD was prompted by reports of some passenger oxygen mask
dispensing units (MDUs) with lanyards that are too long to meet the
proper length specifications of the airplane. This proposed AD would
require replacing the affected MDUs with units that meet the proper
length specifications, replacing the placards, and re-identifying the
assemblies. 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 February
10, 2023.

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 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.
AD Docket: You may examine the AD docket at regulations.gov under
Docket No. FAA-2022-1654; 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, the mandatory continuing airworthiness
information (MCAI), any comments received, and other information. The
street address for Docket Operations is listed above.
Material Incorporated by Reference:
For service information identified in this NPRM, contact
Bombardier Business Aircraft Customer Response Center, 400 Cote-
Vertu Road West, Dorval, Quebec H4S 1Y9, Canada; telephone 514-
855-2999; email ac.yul@aero.bombardier.com; website bombardier.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.

FOR FURTHER INFORMATION CONTACT: Elizabeth M. Dowling, Aerospace
Engineer, Mechanical Systems and Administrative Services Section, FAA,
New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY
11590; telephone 516-361-8046; 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 ADDRESSES. Include ``Docket No. FAA-2022-1654; Project Identifier
MCAI-2022-01165-T'' 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
regulations.gov, including any personal information you provide. The
agency will also post a report summarizing each substantive verbal
contact received about this NPRM.

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
Elizabeth M. Dowling, Aerospace Engineer, Mechanical Systems and
Administrative Services Section, FAA, New York ACO Branch, 1600 Stewart
Avenue, Suite 410, Westbury, NY 11590; telephone 516-361-8046;
email 9-avs-nyaco-cos@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

Transport Canada, which is the aviation authority for Canada, has
issued Transport Canada AD CF-2022-50, dated August 25, 2022 (also
referred to after this as the MCAI), to correct an unsafe condition on
certain Bombardier, Inc., Model CL-600-1A11 (600), CL-600-2A12 (601),
and CL-600-2B16 (601-3A, 601-3R, and 604 Variants) airplanes. The MCAI
states that lanyards of passenger mask dispensing units installed in
the affected airplanes are too long to meet the proper length
specifications of the aircraft. This condition, if not corrected, could
result in the inability to initiate the flow of oxygen to the mask when
required in an emergency situation, with no indication to the passenger
that they are not receiving oxygen.
You may examine the MCAI in the AD docket at regulations.gov under
Docket No. FAA-2022-1654.

Related Service Information Under 1 CFR Part 51

Bombardier has issued the following service information, which
describes procedures for identifying part numbers of the drop-down
oxygen boxes, performing drop-down oxygen mask
reach testing, marking failed seats as inoperative with placards, and
replacing affected oxygen masks:
Service Bulletin 600-0777, dated December 13, 2021.
Service Bulletin 601-1109, Revision 01, dated May 6, 2022.
Service Bulletin 604-35-007, Revision 01, dated May 6,
2022.
These documents are distinct since they apply to different airplane
models. 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

These products are 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 this State of Design Authority,
it has notified the FAA of the unsafe condition described in the MCAI
and service information described above. The FAA is issuing this NPRM
after determining that the unsafe condition described previously is
likely to exist or develop on other products of the same type design.

Proposed AD Requirements in This NPRM

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

Costs of Compliance

The FAA estimates that this AD, if adopted as proposed, would
affect 301 airplanes of U.S. registry. The FAA estimates the following
costs to comply with this proposed AD:

Estimated Costs for Required Actions

Labor cost
Parts cost
Cost per product
Cost on U.S. operators
1 work-hour x $85 per hour = $85
$0
$85
$25,585

The FAA estimates the following costs to do any necessary on-
condition actions that would be required based on the results of any
required actions. The FAA has no way of determining the number of
aircraft that might need these on-condition actions:

Estimated Costs of On-Condition Actions

Labor cost
Parts cost
Cost per product
2 work-hours x $85 per hour = $170
$100
$270

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) Would not affect intrastate aviation in Alaska, and
(3) Would 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: