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2022-13-02 MHI RJ AVIATION ULC (TYPE CERTIFICATE PREVIOUSLY HELD BY BOMBARDIER, INC.): Amendment 39-22088; Docket No. FAA-2022-0388; Project Identifier MCAI-2020-01604-T.
(a) EFFECTIVE DATE

    This airworthiness directive (AD) is effective August 31, 2022.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD  applies  to  MHI RJ Aviation ULC (Type Certificate Previously
    Held by Bombardier, Inc.)  airplanes identified  in  paragraphs (c)(1)
    through (3) of this AD, certificated in any category.

(1) Model CL-600-2C10 (Regional Jet Series 700, 701 & 702) and CL-600-2C11
    (Regional Jet Series 550) airplanes serial numbers 10002 through 10325
    inclusive.

(2) Model CL-600-2D15 (Regional Jet Series 705)  and CL-600-2D24 (Regional
    Jet Series 900)  airplanes,  serial numbers 15001 through 15263 inclu-
    sive.

(3) Model CL-600-2E25  (Regional Jet Series 1000),  serial  numbers  19001
    through 19013 inclusive.

 (d) SUBJECT

    Air Transport Association (ATA) of America Code 28, Fuel system.

(e) UNSAFE CONDITION

    This AD  was prompted  by reports  of the  failure of  certain primary
    ejector fuel feed flexible hoses, which may have a thinner liner  than
    specified by design requirements,  and are therefore more  susceptible
    to cracking. The  FAA is issuing  this AD to  address a possible  fuel
    hose  leak,  which  could cause  a lateral  imbalance with  an adverse
    effect on the airplane's controllability, or result in a dual inflight
    engine shutdown (IFSD).

(f) COMPLIANCE

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

(g) REQUIRED ACTIONS

    At the applicable time  specified in figure 1 to paragraph (g) of this
    AD: Replace each hose  having part number  (P/N) CC670-62022-3 and P/N
    CC670-62022-4 and serial number 001 through 2470 inclusive, in accord-
    ance with Part B of the Accomplishment Instructions of Bombardier Serv
    -ice Bulletin 670BA-28-040, dated September 30, 2019.

               FIGURE 1 TO PARAGRAPH (G)  COMPLIANCE SCHEDULE
    ______________________________________________________________________
           AIRPLANE MODEL                          COMPLIANCE TIME
    ______________________________________________________________________
    CL-600-2C10 and CL-600-2C11               Prior to the accumulation
    airplanes, serial numbers                 of 40,000 flight hours since
    10005 through 10065 inclusive,            SB 670BA-28-008 was
    that have accumulated less than           incorporated
    31,200 flight hours since
    Bombardier Service Bulletin (SB)
    670BA-28-008 was incorporated

    CL-600-2C10 and CL-600-2C11               Within 8,800 flight hours
    airplanes, serial numbers 10005           after the effective date of
    through 10065 inclusive, that             this AD
    have accumulated 31,200 flight
    hours or more since SB 670BA-28-
    008 was incorporated

    CL-600-2C10 and CL-600-2C11 air-          Prior to the accumulation
    planes, serial numbers 10002              of 40,000 total flight hours
    through 10004 inclusive and 10066
    through 10325 inclusive, that have
    accumulated less than 31,200 total
    flight hours as of the effective
    date of this AD

    CL-600-2C10 and CL-600-2C11 air-          Within 8,800 flight hours
    planes, serial numbers 10002 through      after the effective date of
    10004 inclusive and 10066 through         this AD
    10325 inclusive, that have accumulated
    31,200 total flight hours or more as
    of the effective date of this AD

    CL-600-2D15 and CL-600-2D24 airplanes,    Prior to the accumulation
    serial numbers 15001 through 15263 in-    of 40,000 total flight hours
    clusive, that have accumulated less
    than 31,200 total flight hours as of
    the effective date of this AD

    CL-600-2D15 and CL-600-2D24 airplanes,    Within 8,800 flight hours
    serial numbers 15001 through 15263 in-    after the effective date of
    clusive, that have accumulated 31,200     this AD
    total flight hours or more as of the
    effective date of this AD

    CL-600-2E25 airplanes, serial numbers     Prior to the accumulation
    19001 through 19013 inclusive, that       of 40,000 total flight hours
    have accumulated less than 31,200 total
    flight hours as of the effective date
    of this AD

    CL-600-2E25 airplanes, serial numbers     Within 8,800 flight hours
    19001 through 19013 inclusive, that       after the effective date of
    have accumulated 31,200 total flight      this AD
    hours or more as of the effective date
    of this AD
    ______________________________________________________________________

(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
    responsible  Flight  Standards  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.  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 Civil  Aviation (TCCA);  or MHI  RJ
    Aviation ULC'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) TCCA AD
    CF-2020-03, dated March 5, 2020,  for related information.  This  MCAI
    may be found  in the AD docket  on the internet at www.regulations.gov
    by searching for and locating Docket No. FAA-2022-0388.

(2) For more information about this AD contact Joseph Catanzaro, Aerospace
    Engineer, Airframe and Propulsion Section,  FAA,  New York ACO Branch,
    1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-
    7366; email 9-avs-nyaco-cos@faa.gov.

(j) 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 670BA-28-040, dated September 30, 2019.

(ii) [Reserved]

(3) For service information identified in this AD, contact MHI RJ Aviation
    Group,  Customer  Response  Center, 3655 Ave. des Grandes - Tourelles,
    Suite 110, Boisbriand, Quebec J7H 0E2 Canada;  North America toll-free
    telephone 833-990-7272 or direct-dial telephone 450-990-7272; fax 514-
    855-8501; email thd.crj@mhirj.com; internet https://mhirj.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 June 10, 2022.  Christina Underwood, Acting Director, Compliance
& Airworthiness Division, Aircraft Certification Service.

FOR FURTHER INFORMATION CONTACT:  Joseph  Catanzaro,  Aerospace  Engineer,
Airframe and Propulsion Section,  FAA,  New York ACO Branch,  1600 Stewart
Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7366; email 9-avs
-nyaco-cos@faa.gov.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2022-0388; Project Identifier MCAI-2020-01604-T;
Amendment 39-22088; AD 2022-13-02]
RIN 2120-AA64

Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate
Previously Held by Bombardier, Inc.) Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).

ACTION: Final rule.

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

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain MHI RJ Aviation ULC Model CL-600-2C10 (Regional Jet Series 700,
701 & 702), CL-600-2C11 (Regional Jet Series 550), CL-600-2D15
(Regional Jet Series 705), CL-600-2D24 (Regional Jet Series 900), and
CL-600-2E25 (Regional Jet Series 1000) airplanes. This AD was prompted
by reports of the failure of certain primary ejector fuel feed flexible
hoses, which may have a thinner liner than specified by design
requirements, and are therefore more susceptible to cracking. This AD
requires replacing the hoses. The FAA is issuing this AD to address the
unsafe condition on these products.

DATES: This AD is effective August 31, 2022.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of August 31,
2022.

ADDRESSES: For Bombardier service information identified in this final
rule, contact MHI RJ Aviation Group, Customer Response Center, 3655
Ave. des Grandes-Tourelles, Suite 110, Boisbriand, Quebec J7H
0E2 Canada; North America toll-free telephone 833-990-7272 or direct-
dial telephone 450-990-7272; fax 514-855-8501; email thd.crj@mhirj.com;
internet https://mhirj.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. It is also
available on the internet at www.regulations.gov by searching for and
locating Docket No. FAA-2022-0388.

Examining the AD Docket

You may examine the AD docket on the internet at
www.regulations.gov by searching for and locating Docket No. FAA-2022-
0388; 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 final rule, any comments received, and other information. The
address for Docket Operations is U.S. Department of Transportation,
Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200
New Jersey Avenue SE, Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Joseph Catanzaro, Aerospace Engineer,
Airframe and Propulsion Section, FAA, New York ACO Branch, 1600 Stewart
Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7366; email 9-avs-
nyaco-cos@faa.gov.

SUPPLEMENTARY INFORMATION:

Background

Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued TCCA AD CF-2020-03, dated March 5,
2020 (TCCA AD CF-2020-03) (also referred to after this as the Mandatory
Continuing Airworthiness Information, or the MCAI), to correct an
unsafe condition for certain MHI RJ Aviation ULC Model CL-600-2C10
(Regional Jet Series 700, 701 & 702), CL-600-2C11 (Regional Jet Series
550), CL-600-2D15 (Regional Jet Series 705), CL-600-2D24 (Regional Jet
Series 900), and CL-600-2E25 (Regional Jet Series 1000) airplanes. You
may examine the MCAI in the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2022-0388.
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to certain MHI RJ Aviation
ULC Model CL-600-2C10 (Regional Jet Series 700, 701 & 702), CL-600-2C11
(Regional Jet Series 550), CL-600-2D15 (Regional Jet Series 705), CL-
600-2D24 (Regional Jet Series 900), and CL-600-2E25 (Regional Jet
Series 1000) airplanes. The NPRM published in the Federal Register on
April 1, 2022 (87 FR 19032). The NPRM was prompted by reports of the
failure of certain primary ejector fuel feed flexible hoses, which may
have a thinner liner than specified by design requirements, and are
therefore more susceptible to cracking. The NPRM proposed to require
replacing the hoses. The FAA is issuing this AD to address a possible
fuel hose leak, which could cause a lateral imbalance with an adverse
effect on the airplane's controllability, or result in a dual inflight
engine shutdown (IFSD). See the MCAI for additional background
information.

Discussion of Final Airworthiness Directive

Comments

The FAA received a comment from The Air Line Pilots Association,
International (ALPA), who supported the NPRM without change.

Conclusion

The FAA reviewed the relevant data, considered the comment
received, and determined that air safety requires adopting this AD as
proposed. Except for minor editorial changes, this AD is adopted as
proposed in the NPRM. None of the changes will increase the economic
burden on any operator. Accordingly, the FAA is issuing this AD to
address the unsafe condition on these products.

Related Service Information Under 1 CFR Part 51

Bombardier has issued Service Bulletin 670BA-28-040, dated
September 30, 2019. This service information describes procedures for,
among other actions, replacing any primary ejector fuel feed flexible
hose, (P/N) CC670-62022-3 and CC670-62022-4, having serial numbers 001
through 2470 inclusive. 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.

Costs of Compliance

The FAA estimates that this AD affects 457 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:

Estimated Costs for Required Actions

Labor cost
Parts cost
Cost per product
Cost on U.S. operators
12 work-hours x $85 per hour = $1,020
$2,872
$3,892
$1,778,644

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

This AD will not have federalism implications under Executive Order
13132. This AD will 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 that this AD:
(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 Amendment

Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 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: