[Federal Register Volume 86, Number 65 (Wednesday, April 7, 2021)]
[Rules and Regulations]
[Pages 17905-17907]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-07013]


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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.

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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, 
Qu[eacute]bec 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:

[[Page 17906]]

     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 *
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           Labor cost                    Parts cost              Cost per product       Cost on U.S.  operators
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Up to 16 work-hours x $85 per    Up to $7,534.............  Up to $8,894.............  Up to $186,774.
 hour = Up to $1,360.
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* 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

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:

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 
paragraphs (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,

[[Page 17907]]

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 
Protection.

(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 already 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: Submit 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, Qu[eacute]bec 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 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.
    (5) You may view this service information that is incorporated 
by reference 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 & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2021-07013 Filed 4-6-21; 8:45 am]
BILLING CODE 4910-13-P


