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2021-07-10 MHI RJ AVIATION ULC (TYPE CERTIFICATE PREVIOUSLY HELD BY BOMBARDIER, INC.): Amendment 39-21487; Docket No. FAA-2020-1137; Project Identifier MCAI-2020-00816-T.
(a) EFFECTIVE DATE

    This airworthiness directive (AD) is effective May 12, 2021.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD applies to MHI RJ Aviation ULC airplanes  identified  in para-
    graphs (c)(1) and (2) of this AD, certificated in any category.

(1) Model CL-600-2C10  (Regional Jet Series 700, 701 & 702)  airplanes and
    Model CL-600-2C11 (Regional Jet Series 550)  airplanes  having  serial
    numbers (S/Ns) 10082, 10135, 10141, 10155, 10166, 10173, 10178, 10186,
    10249, 10296, and 10327.

(2) Model  CL-600-2D24  (Regional Jet Series 900)  airplanes  having  S/Ns
    15099, 15102, 15144, 15159, 15201, 15212, 15279, 15396, 15409  through
    15413 inclusive, 15415,  15419 through 15427 inclusive,  15430, 15449,
    and 15453.

(d) SUBJECT

    Air Transport Association (ATA) of America Code 30,  Ice and Rain Pro-
    tection.

(e) REASON

    This AD was prompted by a report that some piccolo ducts for the  wing
    anti-ice system have bleed holes  that do not conform to  requirements
    (such as being undersized, un-burred,  or in the wrong location).  The
    FAA is issuing  this AD to  address non-conforming piccolo  duct bleed
    holes, which could lead to degradation of the wing anti-ice protection
    of the leading edge of certain slats, and possibly result in  airplane
    handling issues during critical phases of flight.

(f) COMPLIANCE

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

(g) INSPECTION AND CORRECTIVE ACTION

    Within 8,800 flight hours after the effective date of this AD, inspect
    for the presence of  affected piccolo duct assemblies,  as applicable,
    and replace  each affected  piccolo duct  with a  new piccolo duct, as
    applicable,  in  accordance with  the  Accomplishment Instructions  of
    Bombardier Service Bulletin 670BA-30-025, dated December 17, 2019.

(h) REPORTING

    At the applicable  time specified in  paragraph (h)(1) or  (2) of this
    AD: Report the piccolo duct  part and serial numbers before  and after
    the modification required by paragraph (g) of this AD to Bombardier in
    accordance with the instructions  of Bombardier Service Bulletin 670BA
    -30-025, dated December 17, 2019.

(1) If the inspection was done on  or after the effective date of this AD:
    Submit the report within 30 days after the inspection.

(2) If the inspection was done  before the effective date of this AD: Sub-
    mit the report within 30 days after the effective date of this AD.

(i) 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;  fax 516-794-5531.  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.

(j) RELATED INFORMATION

(1) Refer to Mandatory Continuing Airworthiness Information (MCAI) TCCA AD
    CF-2020-23 dated June 24, 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-2020-1137.

(2) For more information about this AD, contact Siddeeq Bacchus, Aerospace
    Engineer, Mechanical Systems and Administrative Services Section, FAA,
    New York  ACO Branch,  1600 Stewart Avenue,  Suite  410,  Westbury, NY
    11590; telephone 516-228-7362; 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 670BA-30-025, dated December 17, 2019.

(ii) [Reserved]

(3) For service information identified in this AD, contact MHI RJ Aviation
    ULC, 12655 Henri-Fabre Blvd., Mirabel, Quebec J7N 1E1 Canada; Widebody
    Customer Response Center North America toll-free telephone +1-844-272-
    2720 or  direct-dial  telephone +1-514-855-8500;  fax +1-514-855-8501;
    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 fedreg
    .legal@nara.gov,  or go to: https://www.archives.gov/federal-register/
    cfr/ibr-locations.html.

Issued on March 23, 2021. Lance T. Gant, Director, Compliance & Airworthi-
ness Division, Aircraft Certification Service.

FOR FURTHER INFORMATION CONTACT:  Siddeeq  Bacchus,   Aerospace  Engineer,
Mechanical Systems and Administrative Services Section,  FAA, New York ACO
Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-
228-7362; email 9-avs-nyaco-cos@faa.gov.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration


14 CFR Part 39

[Docket No. FAA-2020-1137; Project Identifier MCAI-2020-00816-T;
Amendment 39-21487; AD 2021-07-10]
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), and CL-600-2D24
(Regional Jet Series 900) airplanes. This AD was prompted by a report
that some piccolo ducts for the wing anti-ice system have bleed holes
that do not conform to requirements. This AD requires, depending on
airplane configuration, inspection for the presence of affected wing
anti-ice system piccolo ducts and corrective actions, or replacement of
affected piccolo ducts with new piccolo ducts. The FAA is issuing this
AD to address the unsafe condition on these products.

DATES: This AD is effective May 12, 2021.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of May 12,
2021.

ADDRESSES: For service information identified in this final rule,
contact MHI RJ Aviation ULC, 12655 Henri-Fabre Blvd., Mirabel,
Quebec J7N 1E1 Canada; Widebody Customer Response Center North
America toll-free telephone +1-844-272-2720 or direct-dial telephone
+1-514-855-8500; fax +1-514-855-8501; 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 https://www.regulations.gov by searching for and locating
Docket No. FAA-2020-1137.

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-
1137; 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: Siddeeq Bacchus, Aerospace Engineer,
Mechanical Systems and Administrative Services Section, FAA, New York
ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7362; 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-2020-23, dated June 24,
2020 (TCCA AD CF-2020-23) (also referred to 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), and CL-600-2D24
(Regional Jet Series 900) 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-2020-1137.
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), and CL-600-2D24 (Regional Jet Series 900)
airplanes. The NPRM published in the Federal Register on December 21,
2020 (85 FR 82975). The NPRM was prompted by a report that some piccolo
ducts for the wing anti-ice system have bleed holes that do not conform
to requirements (such as being undersized, un-burred, or in the wrong
location). The NPRM proposed to require, depending on airplane
configuration, inspection for the presence of affected wing anti-ice
system piccolo ducts and corrective actions, or replacement of affected
piccolo ducts with new piccolo ducts. The FAA is issuing this AD to
address non-conforming piccolo duct bleed holes, which could lead to
degradation of the wing anti-ice protection of the leading edge of
certain slats, and possibly result in airplane handling issues during
critical phases of flight. See the MCAI for additional background
information.

Comments

The FAA gave the public the opportunity to participate in
developing this final rule. The FAA received no comments on the NPRM or
on the determination of the cost to the public.

Clarification of Reporting Requirement

Bombardier Service Bulletin 670BA-30-025, dated December 17, 2019,
includes a requirement to report the pre- and post-modification part
and serial number of each replaced piccolo duct to Bombardier. The FAA
has added paragraph (h) of this AD to clarify the appropriate
compliance time for this reporting and redesignated subsequent
paragraphs accordingly. The FAA has also revised the Cost of Compliance
portion of this AD to include the estimated costs for this reporting
requirement.

Conclusion

The FAA reviewed the relevant data and determined that air safety
and the public interest require adopting this final rule with the
changes described previously and minor editorial changes. The FAA has
determined that these minor changes:

Are consistent with the intent that was proposed in the
NPRM for addressing the unsafe condition; and
Do not add any additional burden upon the public than was
already proposed in the NPRM.

The FAA also determined that these changes will not increase the
economic burden on any operator or increase the scope of this final
rule.

Related Service Information Under 1 CFR Part 51

Bombardier has issued Service Bulletin 670BA-30-025, dated December
17, 2019. This service information describes, for certain airplanes,
procedures for replacement of affected piccolo ducts with new piccolo
ducts. This service information also describes, for certain other
airplanes, procedures for inspection for the presence of affected wing
anti-icing system piccolo ducts, and depending on inspection results,
replacement of affected piccolo ducts with new piccolo ducts or
contacting the manufacturer for further instruction. 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 21 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
Up to 16 work-hours x $85 per hour = Up to $1,360 Up to $7,534 Up to $8,894 Up to $186,774

* Table does not include estimated costs for reporting.

The FAA estimates that it would take about 1 work-hour per product
to comply with the reporting requirement in this AD. The average labor
rate is $85 per hour. Based on these figures, the FAA estimates the
cost of reporting on U.S. operators to be $1,785, or $85 per product.

Paperwork Reduction Act

A federal agency may not conduct or sponsor, and a person is not
required to respond to, nor shall a person be subject to penalty for
failure to comply with a collection of information subject to the
requirements of the Paperwork Reduction Act unless that collection of
information displays a currently valid OMB Control Number. The OMB
Control Number for this information collection is 2120-0056. Public
reporting for this collection of information is estimated to take
approximately 1 hour per response, including the time for reviewing
instructions, searching existing data sources, gathering and
maintaining the data needed, and completing and reviewing the
collection of information. All responses to this collection of
information are mandatory. Send comments regarding this burden estimate
or any other aspect of this collection of information, including
suggestions for reducing this burden, to Information Collection
Clearance Officer, Federal Aviation Administration, 10101 Hillwood
Parkway, Fort Worth, TX 76177-1524.

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.

Adoption of 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: