Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes, 55479-55483 [2021-21830]
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Federal Register / Vol. 86, No. 191 / Wednesday, October 6, 2021 / Rules and Regulations
Administrative Procedure Act (5 U.S.C. 552,
553); 42 U.S.C. 2139a, 2155a; 44 U.S.C. 3504
note.
Section 110.1(b) also issued under 22
U.S.C. 2403; 22 U.S.C. 2778a; 50 App. U.S.C.
2401 et seq.
2. In § 110.2, revise the definition of
Deuterium to read as follows:
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§ 110.2
Definitions.
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Deuterium means deuterium and any
deuterium compound, including heavy
water, in which the ratio of deuterium
atoms to hydrogen atoms exceeds
1:5000; and deuterium for nuclear end
use means deuterium and any
deuterium compound, including heavy
water, in which the ratio of deuterium
atoms to hydrogen atoms exceeds
1:5000, that is intended for use in a
nuclear reactor. Export of deuterium
and deuterium compounds, including
heavy water, for non-nuclear end use is
regulated by the Department of
Commerce.
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3. In § 110.9, revise paragraph (d) to
read as follows:
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§ 110.9 List of Nuclear Material under NRC
export licensing authority.
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(d) Deuterium for nuclear end use.
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(a) A general license is issued to any
person to export to any country not
listed in § 110.28 or § 110.29:
(1) Deuterium and deuterium
compounds (other than heavy water) for
nuclear end use in individual shipments
of 10 kilograms or less, not to exceed
200 kilograms per calendar year to any
one country; and
(2) Heavy water for nuclear end use in
individual shipments of 50 kilograms or
less, not to exceed 1,000 kilograms per
calendar year to any one country.
(b) A general license is issued to any
person to export to any country listed in
§ 110.29:
(1) Deuterium and deuterium
compounds (other than heavy water) for
nuclear end use in individual shipments
of 1 kilogram or less, not to exceed 5
kilograms per calendar year to any one
country listed in § 110.29; and
(2) Heavy water for nuclear end use in
individual shipment of 5 kilograms or
less, not to exceed 25 kilograms per
calendar year to any one country listed
in § 110.29.
■ 5. In § 110.40, revise paragraph
(b)(5)(iii), redesignate paragraph
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DEPARTMENT OF TRANSPORTATION
§ 110.40
14 CFR Part 39
Commission review.
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(b) * * *
(5) * * *
(iii) 250 kilograms of source material;
(iv) 250 kilograms of heavy water for
nuclear end use; or
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Federal Aviation Administration
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6. In § 110.41, revise paragraph (a)(4),
redesignate paragraphs (a)(5) through
(a)(10) as paragraphs (a)(6) through
(a)(11), and add new paragraph (a)(5) to
read as follows:
■
§ 110.41
Executive Branch review.
(a) * * *
(4) More than 3.7 TBq (100 Curies) of
tritium;
(5) Deuterium for nuclear end use,
other than exports of deuterium to
Canada;
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7. In § 110.42, revise paragraph (b)
introductory text to read as follows:
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Export licensing criteria.
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§ 110.24 General license for the export of
deuterium for nuclear end use.
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(b)(5)(iv) as paragraph (b)(5)(v), and add
new paragraph (b)(5)(iv) to read as
follows:
§ 110.42
4. Revise § 110.24 to read as follows:
55479
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(b) The review of license applications
for the export of nuclear equipment,
other than a production or utilization
facility, and for deuterium for nuclear
end use and nuclear grade graphite for
nuclear end use is governed by the
following criteria:
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§ 110.54
[Amended]
8. In § 110.54(a)(1), add the phrase
‘‘for nuclear end use’’ after the word
‘‘deuterium’’ wherever it appears.
■
9. In § 110.70, revise paragraph (b)(3)
to read as follows:
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§ 110.70 Public Notice of receipt of an
application.
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(b) * * *
(3) 10,000 kilograms or more of heavy
water for nuclear end use. (Note: Does
not apply to exports of heavy water to
Canada for nuclear end use.)
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Dated: September 21, 2021.
For the Nuclear Regulatory Commission.
Margaret Doane,
Executive Director for Operations.
[FR Doc. 2021–21548 Filed 10–5–21; 8:45 am]
BILLING CODE 7590–01–P
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[Docket No. FAA–2021–0309; Project
Identifier MCAI–2020–00918–T; Amendment
39–21730; AD 2021–19–12]
RIN 2120–AA64
Airworthiness Directives; MHI RJ
Aviation ULC (Type Certificate
Previously Held by Bombardier, Inc.)
Airplanes
Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
AGENCY:
The FAA is adopting a new
airworthiness directive (AD) for 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 and a design review indicating
that there could be possible corrosion
on the main landing gear (MLG) outer
cylinder at the interface with the gland
nut on the shock strut installation and
on the forward and aft trunnion pins in
the MLG dressed shock strut assembly.
This AD requires detailed inspections
for corrosion on the MLG outer cylinder
assemblies, certain MLG dressed shock
strut assemblies, and the MLG outer
cylinder at the gland nut threads, thread
relief groove, and chamfer; a detailed
inspection for the presence of corrosioninhibiting compound (CIC) on the MLG
forward and aft trunnion pins and
grease adapter assemblies; applicable
corrective actions; application of
primer, paint, and CIC as applicable; reidentification of certain part numbers;
and marking of the MOD STATUS field
of the nameplate of certain parts. The
FAA is issuing this AD to address the
unsafe condition on these products.
DATES: This AD is effective November
10, 2021.
The Director of the Federal Register
approved the incorporation by reference
of certain publications listed in this AD
as of November 10, 2021
ADDRESSES: For service information
identified in this final rule, contact MHI
RJ Aviation ULC, 12655 Henri-Fabre
Blvd., Mirabel, Que´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–
SUMMARY:
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Federal Register / Vol. 86, No. 191 / Wednesday, October 6, 2021 / Rules and Regulations
8501; email thd.crj@mhirj.com; internet
https://eservices.aero.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. It is also available
on the internet at https://
www.regulations.gov by searching for
and locating Docket No. FAA–2021–
0309.
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–2021–
0309; 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:
Darren Gassetto, Aerospace Engineer,
Mechanical Systems and Administrative
Services Section, FAA, New York ACO
Branch, 1600 Stewart Avenue, Suite
410, Westbury, NY 11590; telephone
516–228–7323; fax 516–794–5531; email
9-avs-nyaco-cos@faa.gov.
SUPPLEMENTARY INFORMATION:
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Background
Transport Canada Civil Aviation
(TCCA), which is the aviation authority
for Canada, has issued TCCA AD CF–
2019–17R1, dated June 18, 2020 (TCCA
AD CF–2019–17R1, dated June 18, 2020)
(also referred to as the Mandatory
Continuing Airworthiness Information,
or the MCAI), to correct an unsafe
condition for MHI RJ Aviation ULC
(type certificate previously held by
Bombardier, Inc.) Model CL–600–2C10
(Regional Jet Series 700, 701 & 702)
airplanes, Model CL–600–2C11
(Regional Jet Series 550) airplanes,
Model CL–600–2D15 (Regional Jet
Series 705) airplanes, CL–600–2D24
(Regional Jet Series 900) airplanes, and
Model CL–600–2E25 (Regional Jet Series
1000) 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–2021–0309.
The FAA issued a notice of proposed
rulemaking (NPRM) to amend 14 CFR
part 39 by adding an AD that would
apply to MHI RJ Aviation ULC Model
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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 20, 2021 (86 FR 20461). The
NPRM was prompted by reports and a
design review indicating that there
could be corrosion on the MLG outer
cylinder assemblies and certain MLG
dressed shock strut assemblies; primer
was not correctly applied at the gland
nut thread relief groove and chamfer
areas on certain MLG outer cylinders
during production; and CIC was
inadvertently removed from certain
MLG forward and aft trunnion pins and
grease adapter assemblies during
maintenance. The NPRM proposed to
require detailed inspections for
corrosion on the MLG outer cylinder
assemblies, certain MLG dressed shock
strut assemblies, and the MLG outer
cylinder at the gland nut threads, thread
relief groove, and chamfer; a detailed
inspection for the presence of CIC on
the MLG forward and aft trunnion pins
and grease adapter assemblies;
applicable corrective actions;
application of primer, paint, and CIC as
applicable; re-identification of certain
part numbers; and marking of the MOD
STATUS field of the nameplate of
certain parts. The FAA is issuing this
AD to address undetected corrosion on
the MLG forward and aft trunnion pins,
and the gland nut interface on certain
MLG outer cylinders, which could
result in an MLG collapse. See the
MCAI for additional background
information.
Comments
The FAA gave the public the
opportunity to participate in developing
this final rule. The following presents
the comments received on the NPRM
and the FAA’s response to each
comment.
Support for the NPRM
Air Line Pilots Association,
International (ALPA) stated that it
supports the NPRM.
Request to Separate the Proposed AD
Into Two Separate AD Actions
SkyWest Airlines (SkyWest) requested
that the proposed AD be separated into
two AD actions. The commenter
recommended that one AD address the
MLG outer cylinder assemblies and
dressed shock strut assemblies and the
other AD address the MLG forward and
aft trunnion pins. The commenter stated
that there are multiple service bulletins
and requirements specified in the
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proposed AD that are related to different
MLG components.
The FAA disagrees with the
commenter’s request. The FAA
acknowledges that this AD includes
requirements for different MLG
components and specifies multiple
service bulletins; however, these MLG
components are interrelated. In order to
address the identified unsafe condition
the requirements must be completed at
the same time. In addition, the AD body
is organized to facilitate an owner/
operator’s compliance with the
requirements of this AD. Each header
for paragraphs (g) through (k) of this AD
identifies the affected MLG component
and the applicable actions. The FAA has
not changed this AD in regard to this
issue.
Request To Allow Credit for Vendor
Service Bulletins
SkyWest requested that paragraph (l)
of the proposed AD, Credit for Previous
Actions, be revised to include the
applicable vendor service bulletins
published by Goodrich. The commenter
stated that this would alleviate the need
to request multiple alternative methods
of compliance (AMOCs) for airplanes on
which the MLG gear is returned from
overhaul with only the actions
described in the Goodrich service
bulletins accomplished rather that the
actions described in the corresponding
Bombardier service bulletins. The
commenter noted that each Bombardier
service bulletin specified in paragraph
(l) of the proposed AD refers to a
corresponding Goodrich service
bulletin.
The FAA agrees to clarify what must
be done if certain actions required by
this AD have already been
accomplished. Paragraph (f) of this AD
states ‘‘Comply with this AD within the
compliance times specified, unless
already done.’’ If an operator has
already accomplished some of the
actions required by this AD then only
the remaining actions need to be
completed. Therefore, for airplanes that
have already incorporated the actions
described in UTC Aerospace Systems
(Goodrich Aerospace Canada Ltd)
Service Bulletin 49101–32–72, Goodrich
Service Bulletin 49200–32–44, or
Goodrich Service Bulletin 49200–32–80
prior to the effective date of this AD,
only the remaining requirements
described in the corresponding
Bombardier service bulletins need to be
completed on those airplanes.
The FAA does not agree with granting
complete credit for the actions required
by paragraphs (g), (i), and (j) of this AD
using only the procedures described in
the applicable Goodrich service
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bulletins. There are additional actions
required for these inspections, including
corrective actions and operational tests,
that are included in the Bombardier
service bulletins but not in the
corresponding Goodrich service
bulletins.
In regards to paragraph (l) in this AD,
Credit for Previous Actions, the intent of
that paragraph is to provide credit for
actions required by paragraphs (g), (h),
and (j) of this AD if those actions were
performed before the effective date of
this AD using the certain earlier
revisions of the applicable Bombardier
service bulletins specified in paragraph
(l) of this AD or equivalent service
information. The FAA has not changed
this AD in regard to this issue.
Conclusion
The FAA reviewed the relevant data,
considered the comments received, and
determined that air safety and the
public interest require adopting this
final rule as proposed, except for 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.
Related Service Information Under 1
CFR Part 51
Bombardier has issued the following
service information.
• Service Bulletin 670BA–32–024,
Revision C, dated February 11, 2015,
which describes procedures for a
detailed visual inspection of the MLG
outer cylinder assemblies and dressed
shock strut assemblies for corrosion of
the outer cylinder gland nut thread
interface and relief area, and corrective
actions including repair and corrosion
removal.
• Service Bulletin 670BA–32–034,
Revision B, dated December 21, 2018,
which describes procedures for a
detailed visual inspection of the inside
diameter of the MLG trunnion pins for
discrepancies including the condition of
paint and CIC and evidence of
corrosion, and corrective actions
including replacement and rework of
the trunnion pins as applicable.
• Service Bulletin 670BA–32–039,
dated February 29, 2012, which
describes procedures for inspections of
the inner diameter of the MLG forward
and aft trunnion pins for discrepancies
including corrosion and inadequate CIC,
and corrective actions including
application of CIC and replacement of
55481
corroded forward and aft trunnion pins
with serviceable parts.
• Service Bulletin 670BA–32–052,
dated February 9, 2015, which describes
procedures for a detailed visual
inspection of the gland nut thread relief
groove and chamfer surface for the
condition of the protective coating and
for discrepancies including evidence of
corrosion or rework at the gland nut
thread relief groove and chamfer surface
of the MLG shock strut outer cylinder
assemblies, and corrective actions
including corrosion removal.
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.
Differences Between This AD and the
MCAI or Service Information
Although certain service information
specifies to return damaged MLG
trunnion pins to Goodrich Landing
Gear, that action would not be required
by this AD.
Costs of Compliance
The FAA estimates that this AD
affects 562 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
Up to 100 work-hours × $85 per
hour = Up to $8,500.
Up to $36,604 ...............................
Up to $45,104 ...............................
According to the manufacturer, some
or all of the costs of this AD may be
covered under warranty, thereby
reducing the cost impact on affected
operators. The FAA does not control
warranty coverage for affected operators.
As a result, the FAA has included all
known costs in the cost estimate.
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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
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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,
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Cost on U.S. operators
Up to $25,348,448.
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.
§ 39.13
[Amended]
2. The FAA amends § 39.13 by adding
the following new airworthiness
directive:
■
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Federal Register / Vol. 86, No. 191 / Wednesday, October 6, 2021 / Rules and Regulations
2021–19–12 MHI RJ Aviation ULC (Type
Certificate Previously Held by
Bombardier, Inc.): Amendment 39–
21730; Docket No. FAA–2021–0309;
Project Identifier MCAI–2020–00918–T.
(a) Effective Date
This airworthiness directive (AD) is
effective November 10, 2021.
(b) Affected ADs
None.
(c) Applicability
This AD applies to the MHI RJ Aviation
ULC (type certificate previously held by
Bombardier, Inc.) airplanes, certificated in
any category, specified in paragraphs (c)(1)
through (3) of this AD.
(1) Model CL–600–2C10 (Regional Jet
Series 700, 701 & 702) and Model CL–600–
2C11 (Regional Jet Series 550) airplanes,
serial numbers 10002 and subsequent.
(2) Model CL–600–2D15 (Regional Jet
Series 705) airplanes and CL–600–2D24
(Regional Jet Series 900) airplanes, serial
numbers 15001 and subsequent.
(3) Model CL–600–2E25 (Regional Jet
Series 1000) airplanes, serial numbers 19001
and subsequent.
(d) Subject
Air Transport Association (ATA) of
America Code 32, Landing Gear.
(e) Reason
This AD was prompted by reports and a
design review indicating that there could be
corrosion on the main landing gear (MLG)
outer cylinder assemblies at the interface
with the gland nut on the shock strut
installation and on the forward and aft
trunnion pins in the MLG dressed shock strut
assemblies; primer was not correctly applied
at the gland nut thread relief groove and
chamfer areas on certain MLG outer cylinders
during production; and corrosion-inhibiting
compound (CIC) could have inadvertently
been removed from certain MLG forward and
aft trunnion pins and grease adapter
assemblies during maintenance. The FAA is
issuing this AD to address undetected
corrosion on the MLG forward and aft
trunnion pins, and the gland nut interface on
certain MLG outer cylinders, which could
result in an MLG collapse.
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(f) Compliance
Comply with this AD within the
compliance times specified, unless already
done.
(g) Inspection and Application of Corrosion
Protection for MLG Outer Cylinder
Assemblies and Certain MLG Dressed Shock
Strut Assemblies
For airplanes identified in paragraphs
(c)(1) and (2) of this AD with MLG outer
cylinder assemblies and MLG dressed shock
strut assemblies having part numbers and
serial numbers specified in the effectivity
tables in Section 1.A.(1) of Bombardier
Service Bulletin 670BA–32–024, Revision C,
dated February 11, 2015 (Bombardier Service
Bulletin 670BA–32–024, Revision C): At the
applicable time specified in paragraph (g)(1)
or (2) of this AD, do a detailed visual
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inspection for corrosion, and all other
required actions specified in, and in
accordance with, Section 2., Part A, of the
Accomplishment Instructions of Bombardier
Service Bulletin 670BA–32–024, Revision C.
(1) For MLG assemblies that have
accumulated 12,500 total flight hours or less,
and have been in service for 72 months or
less from entry into service or the last
overhaul date: Within 6,500 flight hours or
36 months, whichever comes first, after the
effective date of this AD.
(2) For MLG assemblies that have
accumulated more than 12,500 total flight
hours, or have been in service for more than
72 months from entry into service or the last
overhaul date: Within 3,500 flight hours or
24 months, whichever occurs first, after the
effective date of this AD.
(h) Inspection of Certain Other MLG Dressed
Shock Strut Assemblies and Corrective
Action
For airplanes identified in paragraphs
(c)(1) and (2) of this AD, equipped with MLG
dressed shock strut assemblies having part
numbers (P/Ns) 49000–25 through 49000–46
and P/Ns 49050–15 through 49050–22, on
which the MLG active dynamic seal has been
replaced with the spare dynamic seal as
specified in Bombardier CRJ700/705/900/
1000 Aircraft Maintenance Manual (AMM),
CSP B–001, Task 32–11–10–960–802,
Revision 37, dated November 25, 2011, or
earlier: At the applicable time specified in
paragraph (h)(1) or (2) of this AD, do a
detailed visual inspection of the MLG
dressed shock strut assemblies for corrosion,
and all applicable corrective actions, in
accordance with Section 2., Part B, of the
Accomplishment Instructions of Bombardier
Service Bulletin 670BA–32–024, Revision C.
(1) For MLG assemblies that have
accumulated 12,500 total flight hours or less,
and have been in service for 72 months or
less from entry into service or the last
overhaul date: Within 6,500 flight hours or
36 months, whichever comes first, after the
effective date of this AD.
(2) For MLG assemblies that have
accumulated more than 12,500 total flight
hours, or have been in service for more than
72 months from entry into service or the last
overhaul date: Within 3,500 flight hours or
24 months, whichever occurs first, after the
effective date of this AD.
(i) Inspection of MLG Outer Cylinder at the
Gland Nut Threads, Thread Relief Groove,
and Chamfer and Corrective Action
For airplanes identified in paragraphs
(c)(1) through (3) of this AD equipped with
MLG outer cylinder assemblies having part
numbers and serial numbers specified in
Section 1.A., Effectivity, of Bombardier
Service Bulletin 670BA–32–052, dated
February 9, 2015: Within 6,500 flight hours
or 36 months, whichever occurs first after the
effective date of this AD, do a detailed visual
inspection of the MLG shock strut outer
cylinder assemblies, and do all other
required actions specified in, and in
accordance with, Section 2. of the
Accomplishment Instructions of Bombardier
Service Bulletin 670BA–32–052, dated
February 9, 2015.
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(j) Inspection of Certain MLG Forward and
Aft Trunnion Pins, and Corrective Action
For airplanes identified in paragraphs
(c)(1) through (3) of this AD equipped with
MLG forward and aft trunnion pins and
grease adapter assemblies having part
numbers and serial numbers specified in
Section 1.A., Effectivity, of Bombardier
Service Bulletin 670BA–32–034, Revision B,
dated December 21, 2018 (Bombardier
Service Bulletin 670BA–32–034, Revision B):
At the applicable time specified in paragraph
(j)(1) or (2) of this AD, do a detailed visual
inspection of the MLG forward and aft
trunnion pins and do all applicable
corrective actions, in accordance with
Section 2.B. and paragraphs 2.C.(6) and (8) of
the Accomplishment Instructions of
Bombardier Service Bulletin 670BA–32–034,
Revision B.
Note 1 to the introductory text of
paragraph (j): The corrective action is
applicable only to MLG forward and aft
trunnion pins having P/Ns 49101–9, –11, and
–13 reworked from P/Ns 49101–1, –5, and –7,
as specified in the procedures in Goodrich
Service Bulletin 49101–32–47, any revision.
The corrective action is not applicable to
MLG forward and aft trunnion pins having P/
Ns 49101–9, –11, and –13 that were installed
as original equipment or purchased from
Goodrich Landing Gear.
(1) For MLG forward and aft trunnion pins
and grease adapter assemblies that have not
had the procedures specified in Goodrich
Service Bulletin 49101–32–47, any revision,
incorporated, at the applicable time specified
in paragraph (j)(1)(i) or (ii) of this AD.
(i) For MLG forward and aft trunnion pins
that have accumulated 10,000 total flight
hours or less, and have been in service 60
months or less from the entry into service or
last overhaul date: Within 6,500 flight hours
or 36 months, whichever occurs first, after
the effective date of this AD.
(ii) For MLG forward and aft trunnion pins
that have accumulated more than 10,000 total
flight hours, or have been in service for more
than 60 months from entry into service or last
overhaul date: Within 3,000 flight hours or
24 months, whichever occurs first, after the
effective date of this AD.
(2) For MLG forward and aft trunnion pins
that have had the procedures specified in
Goodrich Service Bulletin 49101–32–47, any
revision, incorporated: Within 6,500 flight
hours or 36 months, whichever occurs first,
after the effective date of this AD.
(k) Inspection of Certain Other MLG
Trunnion Pins Having P/Ns 49101–9, 49101–
11, and 49101–13, Maintained Using Certain
Maintenance Instructions
For airplanes identified in paragraphs
(c)(1) through (3) of this AD equipped with
MLG forward and aft trunnion pins having P/
Ns 49101–9, 49101–11, and 49101–13 that
were maintained in accordance with the
tasks identified in paragraphs (k)(1) through
(4) of this AD: Within 6,500 flight hours or
36 months after the effective date of this AD,
whichever occurs first, do a detailed visual
inspection of the MLG forward and aft
trunnion pins, and do all applicable
corrective actions, in accordance with
Section 2. of the Accomplishment
E:\FR\FM\06OCR1.SGM
06OCR1
Federal Register / Vol. 86, No. 191 / Wednesday, October 6, 2021 / Rules and Regulations
jspears on DSK121TN23PROD with RULES1
Instructions of Bombardier Service Bulletin
670BA–32–039, dated February 29, 2012.
Note 2 to the introductory text of
paragraph (k): The corrective action
described in this paragraph is not applicable
to MLG forward and aft trunnion pins having
P/Ns 49101–9, –11, and –13 reworked from
P/Ns 49101–1, –5, and –7 as specified in the
procedures in Goodrich SB 49101–32–47,
any revision. The corrective action described
in this paragraph is applicable to MLG
forward and aft trunnion pins having P/Ns
49101–9, –11, and –13 installed as original
equipment or purchased from Goodrich
Landing Gear.
(1) Bombardier CRJ700/705/900/1000
AMM, CSP B–001, Task 32–11–05–400–801
A01, Revision 31, dated March 20, 2010, or
earlier.
(2) Bombardier CRJ700/705/900/1000
AMM, CSP B–001, Task 32–11–05–400–801
A02, Revision 34, dated November 20, 2010,
or earlier.
(3) Bombardier CRJ700/705/900/1000
AMM, CSP B–001, Task 32–11–05–400–804
A01, Revision 35, dated March 20, 2011, or
earlier.
(4) Bombardier CRJ700/705/900/1000
AMM, CSP B–001, Task 32–11–05–400–805
A01, Revision 35, dated March 20, 2011, or
earlier.
(l) Credit for Previous Actions
(1) 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 Section 2.,
Part A, of the Accomplishment Instructions
of Bombardier Service Bulletin 670BA–32–
024, Revision B, dated December 19, 2012.
(2) This paragraph provides credit for
actions required by paragraph (h) of this AD
if those actions were performed before the
effective date of this AD using Section 2.,
Part B, of the Accomplishment Instructions
of Bombardier Service Bulletin 670BA–32–
024, Revision B, dated December 19, 2012; or
Bombardier CRJ700/705/900/1000 AMM,
CSP B–001, Task 32–11–10–960–802,
Revision 38, dated March 25, 2012.
(3) This paragraph provides credit for
actions required by paragraph (j) of this AD
if those actions were performed before the
effective date of this AD using Section 2.B.
and paragraphs 2.C.(6) and (8) of the
Accomplishment Instructions of Bombardier
Service Bulletin 670BA–32–034, dated
February 29, 2012; or Revision A, dated
August 17, 2012.
(4) This paragraph provides credit for
actions required by paragraph (k) of this AD,
if those actions were performed before the
effective date of this AD using the service
information specified in paragraphs (l)(4)(i)
through (iv) of this AD.
(i) Bombardier CRJ700/900/1000 AMM,
CSP B–001, Task 32–11–05–400–801 A01,
Revision 38, dated March 25, 2012.
(ii) Bombardier CRJ700/900/1000 AMM,
CSP B–001, Task 32–11–05–400–801 A02,
Revision 38, dated March 25, 2012.
(iii) Bombardier CRJ700/900/1000 AMM,
CSP B–001, Task 32–11–05–400–804 A01,
Revision 37, dated November 25, 2011, for
actions specified in Section 2.B.(1) of the
Accomplishment Instructions of Bombardier
VerDate Sep<11>2014
16:21 Oct 05, 2021
Jkt 256001
Service Bulletin 670BA–32–039, dated
February 29, 2012.
(iv) Bombardier CRJ700/900/1000 AMM,
CSP B–001, Task 32–11–05–400–805 A01,
Revision 37, dated November 25, 2011, for
actions specified in Section 2.B.(2) of the
Accomplishment Instructions of Bombardier
Service Bulletin 670BA–32–039, dated
February 29, 2012.
(m) No Requirement for Return of Parts
Although certain service information
referenced in this AD specifies to return
damaged MLG trunnion pins to Goodrich
Landing Gear, this AD does not include that
requirement.
(n) 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 local
Flight Standards District 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 local
flight standards district office/certificate
holding district 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.
(o) Related Information
(1) Refer to Mandatory Continuing
Airworthiness Information (MCAI) TCCA AD
CF–2019–17R1, dated June 18, 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–2021–0309.
(2) For more information about this AD,
contact: Darren Gassetto, Aerospace
Engineer, Mechanical Systems and
Administrative Services Section, FAA, New
York ACO Branch, 1600 Stewart Avenue,
Suite 410, Westbury, NY 11590; telephone
516–228–7323; fax 516–794–5531; email 9avs-nyaco-cos@faa.gov.
(p) 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.
PO 00000
Frm 00009
Fmt 4700
Sfmt 4700
55483
(i) Bombardier Service Bulletin 670BA–32–
024, Revision C, dated February 11, 2015.
(ii) Bombardier Service Bulletin 670BA–
32–034, Revision B, dated December 21,
2018.
(iii) Bombardier Service Bulletin 670BA–
32–039, dated February 29, 2012.
(iv) Bombardier Service Bulletin 670BA–
32–052, dated February 9, 2015.
(3) For service information identified in
this AD, contact MHI RJ Aviation ULC, 12655
Henri-Fabre Blvd., Mirabel, Que´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://
eservices.aero.bombardier.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 fr.inspection@nara.gov, or go to:
https://www.archives.gov/federal-register/cfr/
ibr-locations.html.
Issued on September 30, 2021.
Ross Landes,
Deputy Director for Regulatory Operations,
Compliance & Airworthiness Division,
Aircraft Certification Service.
[FR Doc. 2021–21830 Filed 10–5–21; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 71
[Docket No. FAA–2021–0357; Airspace
Docket No. 21–ANE–3]
RIN 2120–AA66
Amendment of Class D and Class E
Airspace; Portsmouth, NH
Federal Aviation
Administration (FAA), DOT.
ACTION: Final rule.
AGENCY:
This action amends Class D
airspace and Class E airspace for
Portsmouth International Airport at
Pease, Portsmouth, NH, due to the
decommissioning of the PEASE Very
High Frequency Omnidirectional Range
Collocated with Distance Measuring
Equipment (VOR/DME) and
cancellation of the standard instrument
associated approach procedures (SIAPs).
This action also updates the airport’s
name and geographic coordinates.
Controlled airspace is necessary for the
safety and management of instrument
flight rules (IFR) operations in the area.
SUMMARY:
E:\FR\FM\06OCR1.SGM
06OCR1
]]>Agencies
[Federal Register Volume 86, Number 191 (Wednesday, October 6, 2021)]
[Rules and Regulations]
[Pages 55479-55483]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-21830]
=======================================================================
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0309; Project Identifier MCAI-2020-00918-T;
Amendment 39-21730; AD 2021-19-12]
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 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 and a
design review indicating that there could be possible corrosion on the
main landing gear (MLG) outer cylinder at the interface with the gland
nut on the shock strut installation and on the forward and aft trunnion
pins in the MLG dressed shock strut assembly. This AD requires detailed
inspections for corrosion on the MLG outer cylinder assemblies, certain
MLG dressed shock strut assemblies, and the MLG outer cylinder at the
gland nut threads, thread relief groove, and chamfer; a detailed
inspection for the presence of corrosion-inhibiting compound (CIC) on
the MLG forward and aft trunnion pins and grease adapter assemblies;
applicable corrective actions; application of primer, paint, and CIC as
applicable; re-identification of certain part numbers; and marking of
the MOD STATUS field of the nameplate of certain parts. The FAA is
issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective November 10, 2021.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of November 10,
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-
[[Page 55480]]
8501; email [email protected]; internet https://eservices.aero.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. It is also available on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2021-
0309.
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-2021-
0309; 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: Darren Gassetto, Aerospace Engineer,
Mechanical Systems and Administrative Services Section, FAA, New York
ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7323; fax 516-794-5531; email [email protected].
SUPPLEMENTARY INFORMATION:
Background
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued TCCA AD CF-2019-17R1, dated June 18,
2020 (TCCA AD CF-2019-17R1, dated June 18, 2020) (also referred to as
the Mandatory Continuing Airworthiness Information, or the MCAI), to
correct an unsafe condition for MHI RJ Aviation ULC (type certificate
previously held by Bombardier, Inc.) Model CL-600-2C10 (Regional Jet
Series 700, 701 & 702) airplanes, Model CL-600-2C11 (Regional Jet
Series 550) airplanes, Model CL-600-2D15 (Regional Jet Series 705)
airplanes, CL-600-2D24 (Regional Jet Series 900) airplanes, and Model
CL-600-2E25 (Regional Jet Series 1000) 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-2021-0309.
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to 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 20, 2021 (86 FR 20461). The NPRM was prompted by reports and a
design review indicating that there could be corrosion on the MLG outer
cylinder assemblies and certain MLG dressed shock strut assemblies;
primer was not correctly applied at the gland nut thread relief groove
and chamfer areas on certain MLG outer cylinders during production; and
CIC was inadvertently removed from certain MLG forward and aft trunnion
pins and grease adapter assemblies during maintenance. The NPRM
proposed to require detailed inspections for corrosion on the MLG outer
cylinder assemblies, certain MLG dressed shock strut assemblies, and
the MLG outer cylinder at the gland nut threads, thread relief groove,
and chamfer; a detailed inspection for the presence of CIC on the MLG
forward and aft trunnion pins and grease adapter assemblies; applicable
corrective actions; application of primer, paint, and CIC as
applicable; re-identification of certain part numbers; and marking of
the MOD STATUS field of the nameplate of certain parts. The FAA is
issuing this AD to address undetected corrosion on the MLG forward and
aft trunnion pins, and the gland nut interface on certain MLG outer
cylinders, which could result in an MLG collapse. See the MCAI for
additional background information.
Comments
The FAA gave the public the opportunity to participate in
developing this final rule. The following presents the comments
received on the NPRM and the FAA's response to each comment.
Support for the NPRM
Air Line Pilots Association, International (ALPA) stated that it
supports the NPRM.
Request to Separate the Proposed AD Into Two Separate AD Actions
SkyWest Airlines (SkyWest) requested that the proposed AD be
separated into two AD actions. The commenter recommended that one AD
address the MLG outer cylinder assemblies and dressed shock strut
assemblies and the other AD address the MLG forward and aft trunnion
pins. The commenter stated that there are multiple service bulletins
and requirements specified in the proposed AD that are related to
different MLG components.
The FAA disagrees with the commenter's request. The FAA
acknowledges that this AD includes requirements for different MLG
components and specifies multiple service bulletins; however, these MLG
components are interrelated. In order to address the identified unsafe
condition the requirements must be completed at the same time. In
addition, the AD body is organized to facilitate an owner/operator's
compliance with the requirements of this AD. Each header for paragraphs
(g) through (k) of this AD identifies the affected MLG component and
the applicable actions. The FAA has not changed this AD in regard to
this issue.
Request To Allow Credit for Vendor Service Bulletins
SkyWest requested that paragraph (l) of the proposed AD, Credit for
Previous Actions, be revised to include the applicable vendor service
bulletins published by Goodrich. The commenter stated that this would
alleviate the need to request multiple alternative methods of
compliance (AMOCs) for airplanes on which the MLG gear is returned from
overhaul with only the actions described in the Goodrich service
bulletins accomplished rather that the actions described in the
corresponding Bombardier service bulletins. The commenter noted that
each Bombardier service bulletin specified in paragraph (l) of the
proposed AD refers to a corresponding Goodrich service bulletin.
The FAA agrees to clarify what must be done if certain actions
required by this AD have already been accomplished. Paragraph (f) of
this AD states ``Comply with this AD within the compliance times
specified, unless already done.'' If an operator has already
accomplished some of the actions required by this AD then only the
remaining actions need to be completed. Therefore, for airplanes that
have already incorporated the actions described in UTC Aerospace
Systems (Goodrich Aerospace Canada Ltd) Service Bulletin 49101-32-72,
Goodrich Service Bulletin 49200-32-44, or Goodrich Service Bulletin
49200-32-80 prior to the effective date of this AD, only the remaining
requirements described in the corresponding Bombardier service
bulletins need to be completed on those airplanes.
The FAA does not agree with granting complete credit for the
actions required by paragraphs (g), (i), and (j) of this AD using only
the procedures described in the applicable Goodrich service
[[Page 55481]]
bulletins. There are additional actions required for these inspections,
including corrective actions and operational tests, that are included
in the Bombardier service bulletins but not in the corresponding
Goodrich service bulletins.
In regards to paragraph (l) in this AD, Credit for Previous
Actions, the intent of that paragraph is to provide credit for actions
required by paragraphs (g), (h), and (j) of this AD if those actions
were performed before the effective date of this AD using the certain
earlier revisions of the applicable Bombardier service bulletins
specified in paragraph (l) of this AD or equivalent service
information. The FAA has not changed this AD in regard to this issue.
Conclusion
The FAA reviewed the relevant data, considered the comments
received, and determined that air safety and the public interest
require adopting this final rule as proposed, except for 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.
Related Service Information Under 1 CFR Part 51
Bombardier has issued the following service information.
Service Bulletin 670BA-32-024, Revision C, dated February
11, 2015, which describes procedures for a detailed visual inspection
of the MLG outer cylinder assemblies and dressed shock strut assemblies
for corrosion of the outer cylinder gland nut thread interface and
relief area, and corrective actions including repair and corrosion
removal.
Service Bulletin 670BA-32-034, Revision B, dated December
21, 2018, which describes procedures for a detailed visual inspection
of the inside diameter of the MLG trunnion pins for discrepancies
including the condition of paint and CIC and evidence of corrosion, and
corrective actions including replacement and rework of the trunnion
pins as applicable.
Service Bulletin 670BA-32-039, dated February 29, 2012,
which describes procedures for inspections of the inner diameter of the
MLG forward and aft trunnion pins for discrepancies including corrosion
and inadequate CIC, and corrective actions including application of CIC
and replacement of corroded forward and aft trunnion pins with
serviceable parts.
Service Bulletin 670BA-32-052, dated February 9, 2015,
which describes procedures for a detailed visual inspection of the
gland nut thread relief groove and chamfer surface for the condition of
the protective coating and for discrepancies including evidence of
corrosion or rework at the gland nut thread relief groove and chamfer
surface of the MLG shock strut outer cylinder assemblies, and
corrective actions including corrosion removal.
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.
Differences Between This AD and the MCAI or Service Information
Although certain service information specifies to return damaged
MLG trunnion pins to Goodrich Landing Gear, that action would not be
required by this AD.
Costs of Compliance
The FAA estimates that this AD affects 562 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 100 work-hours x $85 per hour = Up to $36,604.......... Up to $45,104.......... Up to $25,348,448.
Up to $8,500.
----------------------------------------------------------------------------------------------------------------
According to the manufacturer, some or all of the costs of this AD
may be covered under warranty, thereby reducing the cost impact on
affected operators. The FAA does not control warranty coverage for
affected operators. As a result, the FAA has included all known costs
in the cost estimate.
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:
[[Page 55482]]
2021-19-12 MHI RJ Aviation ULC (Type Certificate Previously Held by
Bombardier, Inc.): Amendment 39-21730; Docket No. FAA-2021-0309;
Project Identifier MCAI-2020-00918-T.
(a) Effective Date
This airworthiness directive (AD) is effective November 10,
2021.
(b) Affected ADs
None.
(c) Applicability
This AD applies to the MHI RJ Aviation ULC (type certificate
previously held by Bombardier, Inc.) airplanes, certificated in any
category, specified in paragraphs (c)(1) through (3) of this AD.
(1) Model CL-600-2C10 (Regional Jet Series 700, 701 & 702) and
Model CL-600-2C11 (Regional Jet Series 550) airplanes, serial
numbers 10002 and subsequent.
(2) Model CL-600-2D15 (Regional Jet Series 705) airplanes and
CL-600-2D24 (Regional Jet Series 900) airplanes, serial numbers
15001 and subsequent.
(3) Model CL-600-2E25 (Regional Jet Series 1000) airplanes,
serial numbers 19001 and subsequent.
(d) Subject
Air Transport Association (ATA) of America Code 32, Landing
Gear.
(e) Reason
This AD was prompted by reports and a design review indicating
that there could be corrosion on the main landing gear (MLG) outer
cylinder assemblies at the interface with the gland nut on the shock
strut installation and on the forward and aft trunnion pins in the
MLG dressed shock strut assemblies; primer was not correctly applied
at the gland nut thread relief groove and chamfer areas on certain
MLG outer cylinders during production; and corrosion-inhibiting
compound (CIC) could have inadvertently been removed from certain
MLG forward and aft trunnion pins and grease adapter assemblies
during maintenance. The FAA is issuing this AD to address undetected
corrosion on the MLG forward and aft trunnion pins, and the gland
nut interface on certain MLG outer cylinders, which could result in
an MLG collapse.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Inspection and Application of Corrosion Protection for MLG Outer
Cylinder Assemblies and Certain MLG Dressed Shock Strut Assemblies
For airplanes identified in paragraphs (c)(1) and (2) of this AD
with MLG outer cylinder assemblies and MLG dressed shock strut
assemblies having part numbers and serial numbers specified in the
effectivity tables in Section 1.A.(1) of Bombardier Service Bulletin
670BA-32-024, Revision C, dated February 11, 2015 (Bombardier
Service Bulletin 670BA-32-024, Revision C): At the applicable time
specified in paragraph (g)(1) or (2) of this AD, do a detailed
visual inspection for corrosion, and all other required actions
specified in, and in accordance with, Section 2., Part A, of the
Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-
024, Revision C.
(1) For MLG assemblies that have accumulated 12,500 total flight
hours or less, and have been in service for 72 months or less from
entry into service or the last overhaul date: Within 6,500 flight
hours or 36 months, whichever comes first, after the effective date
of this AD.
(2) For MLG assemblies that have accumulated more than 12,500
total flight hours, or have been in service for more than 72 months
from entry into service or the last overhaul date: Within 3,500
flight hours or 24 months, whichever occurs first, after the
effective date of this AD.
(h) Inspection of Certain Other MLG Dressed Shock Strut Assemblies and
Corrective Action
For airplanes identified in paragraphs (c)(1) and (2) of this
AD, equipped with MLG dressed shock strut assemblies having part
numbers (P/Ns) 49000-25 through 49000-46 and P/Ns 49050-15 through
49050-22, on which the MLG active dynamic seal has been replaced
with the spare dynamic seal as specified in Bombardier CRJ700/705/
900/1000 Aircraft Maintenance Manual (AMM), CSP B-001, Task 32-11-
10-960-802, Revision 37, dated November 25, 2011, or earlier: At the
applicable time specified in paragraph (h)(1) or (2) of this AD, do
a detailed visual inspection of the MLG dressed shock strut
assemblies for corrosion, and all applicable corrective actions, in
accordance with Section 2., Part B, of the Accomplishment
Instructions of Bombardier Service Bulletin 670BA-32-024, Revision
C.
(1) For MLG assemblies that have accumulated 12,500 total flight
hours or less, and have been in service for 72 months or less from
entry into service or the last overhaul date: Within 6,500 flight
hours or 36 months, whichever comes first, after the effective date
of this AD.
(2) For MLG assemblies that have accumulated more than 12,500
total flight hours, or have been in service for more than 72 months
from entry into service or the last overhaul date: Within 3,500
flight hours or 24 months, whichever occurs first, after the
effective date of this AD.
(i) Inspection of MLG Outer Cylinder at the Gland Nut Threads, Thread
Relief Groove, and Chamfer and Corrective Action
For airplanes identified in paragraphs (c)(1) through (3) of
this AD equipped with MLG outer cylinder assemblies having part
numbers and serial numbers specified in Section 1.A., Effectivity,
of Bombardier Service Bulletin 670BA-32-052, dated February 9, 2015:
Within 6,500 flight hours or 36 months, whichever occurs first after
the effective date of this AD, do a detailed visual inspection of
the MLG shock strut outer cylinder assemblies, and do all other
required actions specified in, and in accordance with, Section 2. of
the Accomplishment Instructions of Bombardier Service Bulletin
670BA-32-052, dated February 9, 2015.
(j) Inspection of Certain MLG Forward and Aft Trunnion Pins, and
Corrective Action
For airplanes identified in paragraphs (c)(1) through (3) of
this AD equipped with MLG forward and aft trunnion pins and grease
adapter assemblies having part numbers and serial numbers specified
in Section 1.A., Effectivity, of Bombardier Service Bulletin 670BA-
32-034, Revision B, dated December 21, 2018 (Bombardier Service
Bulletin 670BA-32-034, Revision B): At the applicable time specified
in paragraph (j)(1) or (2) of this AD, do a detailed visual
inspection of the MLG forward and aft trunnion pins and do all
applicable corrective actions, in accordance with Section 2.B. and
paragraphs 2.C.(6) and (8) of the Accomplishment Instructions of
Bombardier Service Bulletin 670BA-32-034, Revision B.
Note 1 to the introductory text of paragraph (j): The corrective
action is applicable only to MLG forward and aft trunnion pins
having P/Ns 49101-9, -11, and -13 reworked from P/Ns 49101-1, -5,
and -7, as specified in the procedures in Goodrich Service Bulletin
49101-32-47, any revision. The corrective action is not applicable
to MLG forward and aft trunnion pins having P/Ns 49101-9, -11, and -
13 that were installed as original equipment or purchased from
Goodrich Landing Gear.
(1) For MLG forward and aft trunnion pins and grease adapter
assemblies that have not had the procedures specified in Goodrich
Service Bulletin 49101-32-47, any revision, incorporated, at the
applicable time specified in paragraph (j)(1)(i) or (ii) of this AD.
(i) For MLG forward and aft trunnion pins that have accumulated
10,000 total flight hours or less, and have been in service 60
months or less from the entry into service or last overhaul date:
Within 6,500 flight hours or 36 months, whichever occurs first,
after the effective date of this AD.
(ii) For MLG forward and aft trunnion pins that have accumulated
more than 10,000 total flight hours, or have been in service for
more than 60 months from entry into service or last overhaul date:
Within 3,000 flight hours or 24 months, whichever occurs first,
after the effective date of this AD.
(2) For MLG forward and aft trunnion pins that have had the
procedures specified in Goodrich Service Bulletin 49101-32-47, any
revision, incorporated: Within 6,500 flight hours or 36 months,
whichever occurs first, after the effective date of this AD.
(k) Inspection of Certain Other MLG Trunnion Pins Having P/Ns 49101-9,
49101-11, and 49101-13, Maintained Using Certain Maintenance
Instructions
For airplanes identified in paragraphs (c)(1) through (3) of
this AD equipped with MLG forward and aft trunnion pins having P/Ns
49101-9, 49101-11, and 49101-13 that were maintained in accordance
with the tasks identified in paragraphs (k)(1) through (4) of this
AD: Within 6,500 flight hours or 36 months after the effective date
of this AD, whichever occurs first, do a detailed visual inspection
of the MLG forward and aft trunnion pins, and do all applicable
corrective actions, in accordance with Section 2. of the
Accomplishment
[[Page 55483]]
Instructions of Bombardier Service Bulletin 670BA-32-039, dated
February 29, 2012.
Note 2 to the introductory text of paragraph (k): The corrective
action described in this paragraph is not applicable to MLG forward
and aft trunnion pins having P/Ns 49101-9, -11, and -13 reworked
from P/Ns 49101-1, -5, and -7 as specified in the procedures in
Goodrich SB 49101-32-47, any revision. The corrective action
described in this paragraph is applicable to MLG forward and aft
trunnion pins having P/Ns 49101-9, -11, and -13 installed as
original equipment or purchased from Goodrich Landing Gear.
(1) Bombardier CRJ700/705/900/1000 AMM, CSP B-001, Task 32-11-
05-400-801 A01, Revision 31, dated March 20, 2010, or earlier.
(2) Bombardier CRJ700/705/900/1000 AMM, CSP B-001, Task 32-11-
05-400-801 A02, Revision 34, dated November 20, 2010, or earlier.
(3) Bombardier CRJ700/705/900/1000 AMM, CSP B-001, Task 32-11-
05-400-804 A01, Revision 35, dated March 20, 2011, or earlier.
(4) Bombardier CRJ700/705/900/1000 AMM, CSP B-001, Task 32-11-
05-400-805 A01, Revision 35, dated March 20, 2011, or earlier.
(l) Credit for Previous Actions
(1) 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 Section 2., Part A, of the
Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-
024, Revision B, dated December 19, 2012.
(2) This paragraph provides credit for actions required by
paragraph (h) of this AD if those actions were performed before the
effective date of this AD using Section 2., Part B, of the
Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-
024, Revision B, dated December 19, 2012; or Bombardier CRJ700/705/
900/1000 AMM, CSP B-001, Task 32-11-10-960-802, Revision 38, dated
March 25, 2012.
(3) This paragraph provides credit for actions required by
paragraph (j) of this AD if those actions were performed before the
effective date of this AD using Section 2.B. and paragraphs 2.C.(6)
and (8) of the Accomplishment Instructions of Bombardier Service
Bulletin 670BA-32-034, dated February 29, 2012; or Revision A, dated
August 17, 2012.
(4) This paragraph provides credit for actions required by
paragraph (k) of this AD, if those actions were performed before the
effective date of this AD using the service information specified in
paragraphs (l)(4)(i) through (iv) of this AD.
(i) Bombardier CRJ700/900/1000 AMM, CSP B-001, Task 32-11-05-
400-801 A01, Revision 38, dated March 25, 2012.
(ii) Bombardier CRJ700/900/1000 AMM, CSP B-001, Task 32-11-05-
400-801 A02, Revision 38, dated March 25, 2012.
(iii) Bombardier CRJ700/900/1000 AMM, CSP B-001, Task 32-11-05-
400-804 A01, Revision 37, dated November 25, 2011, for actions
specified in Section 2.B.(1) of the Accomplishment Instructions of
Bombardier Service Bulletin 670BA-32-039, dated February 29, 2012.
(iv) Bombardier CRJ700/900/1000 AMM, CSP B-001, Task 32-11-05-
400-805 A01, Revision 37, dated November 25, 2011, for actions
specified in Section 2.B.(2) of the Accomplishment Instructions of
Bombardier Service Bulletin 670BA-32-039, dated February 29, 2012.
(m) No Requirement for Return of Parts
Although certain service information referenced in this AD
specifies to return damaged MLG trunnion pins to Goodrich Landing
Gear, this AD does not include that requirement.
(n) 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 local Flight Standards District 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
local flight standards district office/certificate holding district
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.
(o) Related Information
(1) Refer to Mandatory Continuing Airworthiness Information
(MCAI) TCCA AD CF-2019-17R1, dated June 18, 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-2021-0309.
(2) For more information about this AD, contact: Darren
Gassetto, Aerospace Engineer, Mechanical Systems and Administrative
Services Section, FAA, New York ACO Branch, 1600 Stewart Avenue,
Suite 410, Westbury, NY 11590; telephone 516-228-7323; fax 516-794-
5531; email [email protected].
(p) 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-32-024, Revision C, dated
February 11, 2015.
(ii) Bombardier Service Bulletin 670BA-32-034, Revision B, dated
December 21, 2018.
(iii) Bombardier Service Bulletin 670BA-32-039, dated February
29, 2012.
(iv) Bombardier Service Bulletin 670BA-32-052, dated February 9,
2015.
(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 [email protected]; internet https://eservices.aero.bombardier.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 [email protected], or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html.
Issued on September 30, 2021.
Ross Landes,
Deputy Director for Regulatory Operations, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2021-21830 Filed 10-5-21; 8:45 am]
BILLING CODE 4910-13-P
