Airworthiness Directives; Bombardier, Inc., Airplanes, 83759-83761 [2020-28282]
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Federal Register / Vol. 85, No. 247 / Wednesday, December 23, 2020 / Rules and Regulations
(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/ibrlocations.html.
Issued on December 9, 2020.
Lance T. Gant,
Director, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2020–28268 Filed 12–22–20; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2020–0458; Product
Identifier 2020–NM–029–AD; Amendment
39–21348; AD 2020–25–06]
RIN 2120–AA64
Airworthiness Directives; Bombardier,
Inc., Airplanes
Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
AGENCY:
SUMMARY: The FAA is adopting a new
airworthiness directive (AD) for certain
Bombardier, Inc., Model BD–100–1A10
airplanes. This AD was prompted by a
report that corrosion was found on the
shock strut cylinders during
unscheduled maintenance of the nose
landing gear (NLG). This AD requires a
modification of the NLG shock strut
cylinder. The FAA is issuing this AD to
address the unsafe condition on these
products.
This AD is effective January 27,
2021.
The Director of the Federal Register
approved the incorporation by reference
of certain publications listed in this AD
as of January 27, 2021.
ADDRESSES: For service information
identified in this final rule, contact
Bombardier, Inc., 200 Coˆte-Vertu Road
West, Dorval, Que´bec H4S 2A3, Canada;
North America toll-free telephone 1–
866–538–1247 or direct-dial telephone
1–514–855–2999; email ac.yul@
aero.bombardier.com; internet https://
www.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
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DATES:
VerDate Sep<11>2014
16:31 Dec 22, 2020
Jkt 253001
https://www.regulations.gov by
searching for and locating Docket No.
FAA–2020–0458.
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–
0458; 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:
Discussion
Transport Canada Civil Aviation
(TCCA), which is the aviation authority
for Canada, has issued Canadian AD
CF–2019–43, dated November 8, 2019
(‘‘AD CF–2019–43’’) (also referred to as
the Mandatory Continuing
Airworthiness Information, or ‘‘the
MCAI’’), to correct an unsafe condition
for certain Bombardier, Inc., Model BD–
100–1A10 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–2020–0458.
The FAA issued a notice of proposed
rulemaking (NPRM) to amend 14 CFR
part 39 by adding an AD that would
apply to certain Bombardier, Inc., Model
BD–100–1A10 airplanes. The NPRM
published in the Federal Register on
June 3, 2020 (85 FR 34141). The NPRM
was prompted by a report that corrosion
was found on the shock strut cylinders
during unscheduled maintenance of the
NLG. The NPRM proposed to require a
modification of the NLG shock strut
cylinder. The FAA is issuing this AD to
address corrosion of the NLG, which
could result in structural failure of the
NLG. 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 comment received on the NPRM and
the FAA’s response to that comment.
PO 00000
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Fmt 4700
Sfmt 4700
83759
Request To Revise Certain Compliance
Language in the Proposed AD
Flexjet stated that where the
compliance section of Bombardier
Service Bulletin 100–32–33, Revision
02, dated September 30, 2019, and
Figure 1 to paragraph (g) of the
proposed AD, specify the compliance
time for NLG assemblies with more than
96 months time since new (TSN), the
compliance time does not take into
account that the NLG cylinders with
part number (P/N) 40640–3 and P/N
40640–5 serialized (next higher
assembly P/N 40640–105 and
subcomponents) are life-limited items
with a 7,500 flight cycle discard
interval. Flexjet commented that during
the first 96 month inspection, if the
operator has high flight cycles, it may
elect to replace the cylinder at that time.
Flexjet also commented that the
compliance section of Bombardier
Service Bulletin 100–32–33, Revision
02, dated September 30, 2019, does not
take into account that a new cylinder
could be installed at the 96-month
inspection and it also does not address
if the cylinder was replaced for another
reason after the 96-month inspection.
Flexjet stated that the proposed AD
needs to be specific on applying to the
nose gear cylinder and sleeve part
numbers and not the nose gear or nose
gear strut assembly part numbers.
Flexjet also stated that the nose gear
cylinder and sleeve are the parts with
corrosion and the primary reason for the
service information. Flexjet pointed out
that the sleeve is cut off for inspection
of the cylinder and the same part
number sleeve goes back on following
the inspection. The FAA infers that
Flexjet was requesting that the language
in paragraphs (g)(1) and (2) of this AD
specify that the actions apply to
airplanes with NLG assemblies having
NLG cylinder assemblies and sleeves
with certain part numbers.
The FAA disagrees with the comment.
While NLG cylinder assemblies and
their subcomponents can be replaced
before or after the 96-month interval
inspection, paragraphs 2.B. and 2.C. of
the Accomplishment Instructions of
Bombardier Service Bulletin 100–32–33,
Revision 02, dated September 30, 2019,
ensure the proper corrective actions are
taken to prevent corrosion with those
replaced components when reassembled
on the NLG assembly. This is why the
identification on the NLG assembly
modplate is required. In addition,
paragraph (f) of this AD specifies to,
‘‘Comply with this AD within the
compliance times specified, unless
already done.’’ Therefore, if some of the
specified corrective actions are already
E:\FR\FM\23DER1.SGM
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83760
Federal Register / Vol. 85, No. 247 / Wednesday, December 23, 2020 / Rules and Regulations
complied with, only the remaining
corrective actions in the AD need to be
completed to comply with this AD. The
FAA has not changed this AD in this
regard.
Conclusion
The FAA reviewed the relevant data,
considered the comment 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.
modification of the NLG shock strut
cylinder. These documents are distinct
since they apply to different airplane
serial numbers. 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.
Related Service Information Under 1
CFR Part 51
Bombardier has issued Service
Bulletin 100–32–33, Revision 02, dated
September 30, 2019; and Service
Bulletin 350–32–009, Revision 02, dated
September 30, 2019. This service
information describes procedures for
Costs of Compliance
The FAA estimates that this AD
affects 560 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
Up to 54 work-hours × $85 per hour = Up to $4,590 .......................
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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
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
VerDate Sep<11>2014
16:31 Dec 22, 2020
Jkt 253001
$43,999
Cost per product
Up to $48,589 .............................
(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.
[Amended]
2. The FAA amends § 39.13 by adding
the following new airworthiness
directive (AD):
■
2020–25–06 Bombardier, Inc.: Amendment
39–21348; Docket No. FAA–2020–0458;
Product Identifier 2020–NM–029–AD.
(a) Effective Date
This AD is effective January 27, 2021.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Bombardier, Inc.,
Model BD–100–1A10 airplanes, certificated
in any category, serial numbers (S/Ns) 20003
through 20767 inclusive.
PO 00000
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Fmt 4700
Sfmt 4700
Up to $27,209,840
(d) Subject
Air Transport Association (ATA) of
America Code 32, Landing gear.
(e) Reason
This AD was prompted by a report that
corrosion was found on the shock strut
cylinders during unscheduled maintenance
of the nose landing gear (NLG). The FAA is
issuing this AD to address corrosion of the
NLG, which could result in structural failure
of the NLG.
(f) Compliance
Comply with this AD within the
compliance times specified, unless already
done.
(g) Modification for Airplanes With S/N
20003 Through 20500 Inclusive
■
§ 39.13
Cost on U.S.
operators
For Bombardier, Inc., Model BD–100–1A10
airplanes with S/N 20003 through 20500
inclusive: At the applicable compliance time
specified in paragraph (g)(1) or (2) of this AD,
do the modification in paragraph (g)(1) or (2)
of this AD, as applicable.
(1) For airplanes with NLG assemblies with
96 months or less time since new (TSN) as
of the effective date of this AD: At the NLG
96-month scheduled inspection, do a
modification of the NLG shock strut cylinder,
in accordance with paragraph 2.B. of the
Accomplishment Instructions of Bombardier
Service Bulletin 100–32–33, Revision 02,
dated September 30, 2019.
(2) For airplanes with NLG assemblies with
more than 96 months TSN as of the effective
date of this AD: At the applicable compliance
time specified in figure 1 to paragraph (g) of
this AD, do a modification of the NLG shock
strut cylinder, in accordance with paragraph
2.C. of the Accomplishment Instructions of
Bombardier Service Bulletin 100–32–33,
Revision 02, dated September 30, 2019.
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Federal Register / Vol. 85, No. 247 / Wednesday, December 23, 2020 / Rules and Regulations
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(i) Parts Installation Limitation
As of the effective date of this AD, no
person may install, on any airplane, an NLG
shock strut assembly with part number (P/N)
40630–111, P/N 40630–113, or P/N 44630–
101, unless it has been modified in
accordance with paragraphs 2.B. or 2.C. of
the Accomplishment Instructions of
Bombardier Service Bulletin 100–32–33,
Revision 02, dated September 30, 2019; or
paragraph 2.B. of the Accomplishment
Instructions of Bombardier Service Bulletin
350–32–009, Revision 02, dated September
30, 2019; as applicable.
(j) 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 paragraph 2.B.
or 2.C., as applicable, of Bombardier Service
Bulletin 100–32–33, dated October 31, 2018;
or Bombardier Service Bulletin 100–32–33,
Revision 01, July 31, 2019.
(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 paragraph 2.B.
of Bombardier Service Bulletin 350–32–009,
dated October 31, 2018; or Bombardier
Service Bulletin 350–32–009, Revision 01
dated July 31, 2019; provided that the NLG
shock strut assembly with P/N 44630–101
was removed in lieu of P/N 44610–101, as
specified in paragraph 2.B.(1) of the
Accomplishment Instructions of Bombardier
Service Bulletin 350–32–009, dated October
31, 2018; or Bombardier Service Bulletin
350–32–009, Revision 01 dated July 31, 2019.
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16:31 Dec 22, 2020
Jkt 253001
(k) 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 Bombardier’s TCCA Design
Approval Organization (DAO). If approved by
the DAO, the approval must include the
DAO-authorized signature.
(l) Related Information
(1) Refer to Mandatory Continuing
Airworthiness Information (MCAI) Canadian
AD CF–2019–43, dated November 8, 2019,
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–2020–0458.
(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 9-avs-nyacocos@faa.gov.
PO 00000
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Fmt 4700
Sfmt 9990
(3) Service information identified in this
AD that is not incorporated by reference is
available at the addresses specified in
paragraphs (m)(3) and (4) of this AD.
(m) 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 100–32–33,
Revision 02, dated September 30, 2019.
(ii) Bombardier Service Bulletin 350–32–
009, Revision 02, dated September 30, 2019.
(3) For service information identified in
this AD, contact Bombardier, Inc., 200 CoˆteVertu Road West, Dorval, Que´bec H4S 2A3,
Canada; North America toll-free telephone 1–
866–538–1247 or direct-dial telephone 1–
514–855–2999; email ac.yul@
aero.bombardier.com; internet https://
www.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 fedreg.legal@nara.gov, or go to: https://
www.archives.gov/federal-register/cfr/ibrlocations.html.
Issued on December 1, 2020.
Gaetano A. Sciortino,
Deputy Director for Strategic Initiatives,
Compliance & Airworthiness Division,
Aircraft Certification Service.
[FR Doc. 2020–28282 Filed 12–22–20; 8:45 am]
BILLING CODE 4910–13–P
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ER23DE20.001</GPH>
(h) Modification for Airplanes With S/N
20501 Through 20767 Inclusive
For Bombardier, Inc., Model BD–100–1A10
airplanes with S/N 20501 through 20767
inclusive: At the NLG 96-month scheduled
inspection, do a modification of the NLG
shock strut cylinder, in accordance with
paragraph 2.B. of the Accomplishment
Instructions of Bombardier Service Bulletin
350–32–009, Revision 02, dated September
30, 2019.
83761
]]>Agencies
[Federal Register Volume 85, Number 247 (Wednesday, December 23, 2020)]
[Rules and Regulations]
[Pages 83759-83761]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-28282]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2020-0458; Product Identifier 2020-NM-029-AD; Amendment
39-21348; AD 2020-25-06]
RIN 2120-AA64
Airworthiness Directives; 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 Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was
prompted by a report that corrosion was found on the shock strut
cylinders during unscheduled maintenance of the nose landing gear
(NLG). This AD requires a modification of the NLG shock strut cylinder.
The FAA is issuing this AD to address the unsafe condition on these
products.
DATES: This AD is effective January 27, 2021.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of January 27,
2021.
ADDRESSES: For service information identified in this final rule,
contact Bombardier, Inc., 200 C[ocirc]te-Vertu Road West, Dorval,
Qu[eacute]bec H4S 2A3, Canada; North America toll-free telephone 1-866-
538-1247 or direct-dial telephone 1-514-855-2999; email
[email protected]; internet https://www.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-2020-
0458.
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-
0458; 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:
Discussion
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian AD CF-2019-43, dated November
8, 2019 (``AD CF-2019-43'') (also referred to as the Mandatory
Continuing Airworthiness Information, or ``the MCAI''), to correct an
unsafe condition for certain Bombardier, Inc., Model BD-100-1A10
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-2020-0458.
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to certain Bombardier,
Inc., Model BD-100-1A10 airplanes. The NPRM published in the Federal
Register on June 3, 2020 (85 FR 34141). The NPRM was prompted by a
report that corrosion was found on the shock strut cylinders during
unscheduled maintenance of the NLG. The NPRM proposed to require a
modification of the NLG shock strut cylinder. The FAA is issuing this
AD to address corrosion of the NLG, which could result in structural
failure of the NLG. 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 comment received
on the NPRM and the FAA's response to that comment.
Request To Revise Certain Compliance Language in the Proposed AD
Flexjet stated that where the compliance section of Bombardier
Service Bulletin 100-32-33, Revision 02, dated September 30, 2019, and
Figure 1 to paragraph (g) of the proposed AD, specify the compliance
time for NLG assemblies with more than 96 months time since new (TSN),
the compliance time does not take into account that the NLG cylinders
with part number (P/N) 40640-3 and P/N 40640-5 serialized (next higher
assembly P/N 40640-105 and subcomponents) are life-limited items with a
7,500 flight cycle discard interval. Flexjet commented that during the
first 96 month inspection, if the operator has high flight cycles, it
may elect to replace the cylinder at that time. Flexjet also commented
that the compliance section of Bombardier Service Bulletin 100-32-33,
Revision 02, dated September 30, 2019, does not take into account that
a new cylinder could be installed at the 96-month inspection and it
also does not address if the cylinder was replaced for another reason
after the 96-month inspection.
Flexjet stated that the proposed AD needs to be specific on
applying to the nose gear cylinder and sleeve part numbers and not the
nose gear or nose gear strut assembly part numbers. Flexjet also stated
that the nose gear cylinder and sleeve are the parts with corrosion and
the primary reason for the service information. Flexjet pointed out
that the sleeve is cut off for inspection of the cylinder and the same
part number sleeve goes back on following the inspection. The FAA
infers that Flexjet was requesting that the language in paragraphs
(g)(1) and (2) of this AD specify that the actions apply to airplanes
with NLG assemblies having NLG cylinder assemblies and sleeves with
certain part numbers.
The FAA disagrees with the comment. While NLG cylinder assemblies
and their subcomponents can be replaced before or after the 96-month
interval inspection, paragraphs 2.B. and 2.C. of the Accomplishment
Instructions of Bombardier Service Bulletin 100-32-33, Revision 02,
dated September 30, 2019, ensure the proper corrective actions are
taken to prevent corrosion with those replaced components when
reassembled on the NLG assembly. This is why the identification on the
NLG assembly modplate is required. In addition, paragraph (f) of this
AD specifies to, ``Comply with this AD within the compliance times
specified, unless already done.'' Therefore, if some of the specified
corrective actions are already
[[Page 83760]]
complied with, only the remaining corrective actions in the AD need to
be completed to comply with this AD. The FAA has not changed this AD in
this regard.
Conclusion
The FAA reviewed the relevant data, considered the comment
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 Service Bulletin 100-32-33, Revision 02,
dated September 30, 2019; and Service Bulletin 350-32-009, Revision 02,
dated September 30, 2019. This service information describes procedures
for modification of the NLG shock strut cylinder. These documents are
distinct since they apply to different airplane serial numbers. 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 560 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 54 work-hours x $85 per hour = $43,999 Up to $48,589......... Up to $27,209,840
Up to $4,590.
----------------------------------------------------------------------------------------------------------------
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 (AD):
2020-25-06 Bombardier, Inc.: Amendment 39-21348; Docket No. FAA-
2020-0458; Product Identifier 2020-NM-029-AD.
(a) Effective Date
This AD is effective January 27, 2021.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Bombardier, Inc., Model BD-100-1A10
airplanes, certificated in any category, serial numbers (S/Ns) 20003
through 20767 inclusive.
(d) Subject
Air Transport Association (ATA) of America Code 32, Landing
gear.
(e) Reason
This AD was prompted by a report that corrosion was found on the
shock strut cylinders during unscheduled maintenance of the nose
landing gear (NLG). The FAA is issuing this AD to address corrosion
of the NLG, which could result in structural failure of the NLG.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Modification for Airplanes With S/N 20003 Through 20500 Inclusive
For Bombardier, Inc., Model BD-100-1A10 airplanes with S/N 20003
through 20500 inclusive: At the applicable compliance time specified
in paragraph (g)(1) or (2) of this AD, do the modification in
paragraph (g)(1) or (2) of this AD, as applicable.
(1) For airplanes with NLG assemblies with 96 months or less
time since new (TSN) as of the effective date of this AD: At the NLG
96-month scheduled inspection, do a modification of the NLG shock
strut cylinder, in accordance with paragraph 2.B. of the
Accomplishment Instructions of Bombardier Service Bulletin 100-32-
33, Revision 02, dated September 30, 2019.
(2) For airplanes with NLG assemblies with more than 96 months
TSN as of the effective date of this AD: At the applicable
compliance time specified in figure 1 to paragraph (g) of this AD,
do a modification of the NLG shock strut cylinder, in accordance
with paragraph 2.C. of the Accomplishment Instructions of Bombardier
Service Bulletin 100-32-33, Revision 02, dated September 30, 2019.
[[Page 83761]]
[GRAPHIC] [TIFF OMITTED] TR23DE20.001
(h) Modification for Airplanes With S/N 20501 Through 20767 Inclusive
For Bombardier, Inc., Model BD-100-1A10 airplanes with S/N 20501
through 20767 inclusive: At the NLG 96-month scheduled inspection,
do a modification of the NLG shock strut cylinder, in accordance
with paragraph 2.B. of the Accomplishment Instructions of Bombardier
Service Bulletin 350-32-009, Revision 02, dated September 30, 2019.
(i) Parts Installation Limitation
As of the effective date of this AD, no person may install, on
any airplane, an NLG shock strut assembly with part number (P/N)
40630-111, P/N 40630-113, or P/N 44630-101, unless it has been
modified in accordance with paragraphs 2.B. or 2.C. of the
Accomplishment Instructions of Bombardier Service Bulletin 100-32-
33, Revision 02, dated September 30, 2019; or paragraph 2.B. of the
Accomplishment Instructions of Bombardier Service Bulletin 350-32-
009, Revision 02, dated September 30, 2019; as applicable.
(j) 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 paragraph 2.B. or 2.C., as
applicable, of Bombardier Service Bulletin 100-32-33, dated October
31, 2018; or Bombardier Service Bulletin 100-32-33, Revision 01,
July 31, 2019.
(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 paragraph 2.B. of Bombardier Service
Bulletin 350-32-009, dated October 31, 2018; or Bombardier Service
Bulletin 350-32-009, Revision 01 dated July 31, 2019; provided that
the NLG shock strut assembly with P/N 44630-101 was removed in lieu
of P/N 44610-101, as specified in paragraph 2.B.(1) of the
Accomplishment Instructions of Bombardier Service Bulletin 350-32-
009, dated October 31, 2018; or Bombardier Service Bulletin 350-32-
009, Revision 01 dated July 31, 2019.
(k) 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
Bombardier's TCCA Design Approval Organization (DAO). If approved by
the DAO, the approval must include the DAO-authorized signature.
(l) Related Information
(1) Refer to Mandatory Continuing Airworthiness Information
(MCAI) Canadian AD CF-2019-43, dated November 8, 2019, 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-2020-0458.
(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].
(3) Service information identified in this AD that is not
incorporated by reference is available at the addresses specified in
paragraphs (m)(3) and (4) of this AD.
(m) 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 100-32-33, Revision 02, dated
September 30, 2019.
(ii) Bombardier Service Bulletin 350-32-009, Revision 02, dated
September 30, 2019.
(3) For service information identified in this AD, contact
Bombardier, Inc., 200 C[ocirc]te-Vertu Road West, Dorval,
Qu[eacute]bec H4S 2A3, Canada; North America toll-free telephone 1-
866-538-1247 or direct-dial telephone 1-514-855-2999; email
[email protected]; internet https://www.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 December 1, 2020.
Gaetano A. Sciortino,
Deputy Director for Strategic Initiatives, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2020-28282 Filed 12-22-20; 8:45 am]
BILLING CODE 4910-13-P
