Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes, 31148-31152 [2023-10333]
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31148
Federal Register / Vol. 88, No. 94 / Tuesday, May 16, 2023 / Rules and Regulations
superseding part with internal back electromotive force (EMF) protection.
(iii) Water door solenoid valve, 4-way
selector valve, P/N 20P16–2, SCD
215T92392–2, or superseding part with
internal back EMF protection on which the
design change modification specified in
Viking Technical Bulletin V215/0713,
Revision A, dated June 20, 2022; or Viking
Technical Bulletin V215/3214, Revision A,
dated June 20, 2022; is incorporated.
(2) For airplanes on which a part identified
in paragraph (i)(1)(i) or (iii) of this AD is
installed: Before further flight after
installation, revise the exiting maintenance
or inspection program to incorporate the
information for Chapter 25–70–00 specified
in Viking Temporary Revision 25–27, dated
April 13, 2022, into the Viking CL–215
Maintenance Manual, PSP 292.
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(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 Canadair
Service Bulletin 215–389, Revision 1, dated
September 30, 1991, including the
retrospective action for aircraft modified in
accordance with Canadair Service Bulletin
215–389, dated November 15, 1988; or Viking
Service Bulletin 215–389 Revision 2, dated
September 21, 2021.
(2) This paragraph provides credit for
actions required by paragraphs (i)(1)(i) and
(iii) of this AD, if those actions were
performed before the effective date of this AD
using Viking Technical Bulletin V215/0713,
dated April 14, 2022; or Viking Technical
Bulletin V215/3214, dated April 14, 2022.
(k) Other FAA AD Provisions
(1) Alternative Methods of Compliance
(AMOCs): The Manager, New York ACO
Branch, FAA, has the authority to approve
AMOCs for this AD, if requested using the
procedures found in 14 CFR 39.19. In
accordance with 14 CFR 39.19, send your
request to your principal inspector or
responsible Flight Standards Office, as
appropriate. If sending information directly
to the manager of the certification office,
send it to ATTN: Program Manager,
Continuing Operational Safety, FAA, New
York ACO Branch, 1600 Stewart Avenue,
Suite 410, Westbury, NY 11590; telephone
516–228–7300; fax 516–794–5531. Before
using any approved AMOC, notify your
appropriate principal inspector, or lacking a
principal inspector, the manager of the
responsible Flight Standards Office.
(2) Contacting the Manufacturer: For any
requirement in this AD to obtain instructions
from a manufacturer, the instructions must
be accomplished using a method approved
by the Manager, New York ACO Branch,
FAA; or Transport Canada Civil Aviation
(Transport Canada); or Viking Air Limited’s
Transport Canada Design Approval
Organization (DAO). If approved by the DAO,
the approval must include the DAOauthorized signature.
2021, for related information. This Transport
Canada AD may be found in the AD docket
at regulations.gov under Docket No. FAA–
2022–1301.
(2) For more information about this AD,
contact Thomas Niczky, Aerospace Engineer,
Avionics and Electrical Systems Section,
FAA, New York ACO Branch, 1600 Stewart
Avenue, Suite 410, Westbury, NY 11590;
telephone 516–228–7347; email 9-avs-nyacocos@faa.gov.
(m) Material Incorporated by Reference
(1) The Director of the Federal Register
approved the incorporation by reference 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 Alert Service Bulletin 215–
A497, dated November 16, 1998.
(ii) Viking Service Bulletin 215–389,
Revision 3, dated February 15, 2023.
(iii) Viking Technical Bulletin V215/0713,
Revision A, dated June 20, 2022.
(iv) Viking Technical Bulletin V215/3214,
Revision A, dated June 20, 2022.
(v) Viking CL–215 Maintenance Manual,
PSP 292, Temporary Revision 25–27, dated
April 13, 2022.
(3) For service information identified in
this AD, contact Viking Air Limited, 1959 de
Havilland Way, Sidney, British Columbia
V8L 5V5, Canada; telephone +1–250–656–
7227; fax +1–250–656–0673; email acstechnical.publications@vikingair.com;
website vikingair.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:
www.archives.gov/federal-register/cfr/ibrlocations.html.
Issued on April 8, 2023.
Christina Underwood,
Acting Director, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2023–10332 Filed 5–15–23; 8:45 am]
BILLING CODE 4910–13–P
(l) Additional Information
(1) Refer to Mandatory Continuing
Airworthiness Information (MCAI) Transport
Canada AD CF–2021–51, dated December 21,
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2022–1403; Project
Identifier MCAI–2022–00122–T; Amendment
39–22408; AD 2023–07–06]
RIN 2120–AA64
Airworthiness Directives; De Havilland
Aircraft of Canada Limited (Type
Certificate Previously Held by
Bombardier, Inc.) Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Final rule.
AGENCY:
The FAA is adopting a new
airworthiness directive (AD) for certain
De Havilland Aircraft of Canada Limited
Model DHC–8–401 and –402 airplanes.
This AD was prompted by reports of
corrosion on the horizontal stabilizer
lower center skin panel, including a
finding of corrosion where the skin
thickness had been substantially
reduced, which affected design margins.
This AD requires inspecting the
horizontal stabilizer lower center skin
panel for corrosion, and reworking,
repairing, or replacing the lower center
skin panel if necessary. The FAA is
issuing this AD to address the unsafe
condition on these products.
DATES: This AD is effective June 20,
2023.
The Director of the Federal Register
approved the incorporation by reference
of certain publications listed in this AD
as of June 20, 2023.
ADDRESSES:
AD Docket: You may examine the AD
docket at regulations.gov under Docket
No. FAA–2022–1403; 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, the mandatory
continuing airworthiness information
(MCAI), 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.
Material Incorporated by Reference:
• For service information identified
in this final rule, contact De Havilland
Aircraft of Canada Limited, Dash 8
Series Customer Response Centre, 5800
Explorer Drive, Mississauga, Ontario,
L4W 5K9, Canada; telephone 855–310–
1013 or 647–277–5820; email thd@
dehavilland.com; website
dehavilland.com.
SUMMARY:
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Federal Register / Vol. 88, No. 94 / Tuesday, May 16, 2023 / Rules and Regulations
• 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 at
regulations.gov under Docket No. FAA–
2022–1403.
FOR FURTHER INFORMATION CONTACT:
Yaser Osman, Aerospace Engineer,
Airframe and Propulsion Section, FAA,
New York ACO Branch, 1600 Stewart
Avenue, Suite 410, Westbury, NY
11590; telephone 516–228–7300; email
9-avs-nyaco-cos@faa.gov.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed
rulemaking (NPRM) to amend 14 CFR
part 39 by adding an AD that would
apply to certain De Havilland Aircraft of
Canada Limited Model DHC–8–401 and
–402 airplanes. The NPRM published in
the Federal Register on November 4,
2022 (87 FR 66619). The NPRM was
prompted by AD CF–2022–02, dated
January 28, 2022, issued by Transport
Canada, which is the aviation authority
for Canada (referred to after this as the
MCAI). The MCAI states that there have
been reports of corrosion on the
horizontal stabilizer lower center skin
panel, including a finding of corrosion
where the skin thickness had been
substantially reduced, affecting design
margins. The root cause was found to be
inconsistent chemical processing of the
lower center skin panel, with missing
anodizing layer and primer on some
areas of the skin panel surface. A
substantial reduction of skin panel
thickness due to the effects of corrosion
will compromise the structural integrity
of the horizontal stabilizer.
In the NPRM, the FAA proposed to
require inspecting the horizontal
stabilizer lower center skin panel for
corrosion, and reworking, repairing, or
replacing the lower center skin panel if
necessary.
The FAA is issuing this AD to address
possible reduction of skin panel
thickness due to the effects of corrosion,
which could compromise the structural
integrity of the horizontal stabilizer.
You may examine the MCAI in the AD
docket at regulations.gov under Docket
No. FAA–2022–1403.
Discussion of Final Airworthiness
Directive
Comments
The FAA received comments from Air
Line Pilots Association, International
(ALPA) who supported the NPRM
without change.
The FAA received additional
comments from Horizon Air. The
following presents the comment
received on the NPRM and the FAA’s
response to the comment.
Request To Limit Certain Requirements
Horizon Air requested that paragraph
(g)(3)(i) of the proposed AD require only
Section 3.B. (Procedure) of the
Accomplishment Instructions of De
Havilland Aircraft of Canada Limited
Service Bulletin 84–55–11, dated
February 16, 2021. Horizon Air stated
that requiring the job set-up and close
out sections restricts an operator’s
ability to perform other maintenance in
conjunction with the incorporation of
the service information. Horizon Air
added that the job set-up and close out
sections do not directly correct the
unsafe conditions.
The FAA agrees with the request to
limit the requirements to simplify the
procedure and allow the performance of
other maintenance in conjunction with
the required actions of this AD.
Paragraph (g)(3)(i) of this AD has been
changed to limit the requirements as
requested.
Conclusion
This product has been approved by
the aviation authority of another
country and is approved for operation in
the United States. Pursuant to the FAA’s
bilateral agreement with this State of
Design Authority, it has notified the
FAA of the unsafe condition described
in the MCAI referenced above. The FAA
reviewed the relevant data, considered
the comments received, and determined
that air safety requires adopting this AD
as proposed. Accordingly, the FAA is
issuing this AD to address the unsafe
condition on this product. Except for
minor editorial changes, and any other
changes described previously, this AD is
adopted as proposed in the NPRM.
None of the changes will increase the
economic burden on any operator.
Related Service Information Under 1
CFR Part 51
De Havilland Aircraft of Canada
Limited has issued Service Bulletin 84–
55–05, Revision C, dated August 19,
2021. This service information describes
procedures for inspecting the horizontal
stabilizer lower center skin panel for
corrosion, and, depending on the level
of corrosion, reworking or repairing the
horizontal stabilizer lower center skin
panel.
De Havilland Aircraft of Canada
Limited has also issued Service Bulletin
84–55–11, dated February 16, 2021.
This service information describes
procedures for replacing the horizontal
stabilizer lower center skin panel.
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 56 airplanes of U.S. registry. The
FAA estimates the following costs to
comply with this AD:
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ESTIMATED COSTS FOR REQUIRED ACTIONS
Labor cost
Parts cost
Cost per
product
Cost on U.S.
operators
108 work-hours × $85 per hour = $9,180 ...................................................................................
$0
$9,180
$514,080
The FAA estimates the following
costs to do any necessary on-condition
replacements that would be required
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based on the results of any required
actions. The FAA has no way of
determining the number of aircraft that
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might need this on-condition
replacement:
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Federal Register / Vol. 88, No. 94 / Tuesday, May 16, 2023 / Rules and Regulations
ESTIMATED COSTS OF ON-CONDITION ACTIONS
Labor cost
Parts cost
Cost per
product
108 work-hours × $85 per hour = $9,180 ...............................................................................................................
$21,449
$30,629
The FAA has received no definitive
data on which to base the cost estimates
for the on-condition repairs or rework
specified in this AD.
The FAA has included all known
costs in its cost estimate. According to
the manufacturer, however, some or all
of the costs of this AD may be covered
under warranty, thereby reducing the
cost impact on affected operators.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation
safety, Incorporation by reference,
Safety.
Authority for This Rulemaking
PART 39—AIRWORTHINESS
DIRECTIVES
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.
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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.
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The Amendment
Accordingly, under the authority
delegated to me by the Administrator,
the FAA amends 14 CFR part 39 as
follows:
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:
■
2023–07–06 De Havilland Aircraft of
Canada Limited (Type Certificate
Previously Held by Bombardier, Inc.):
Amendment 39–22408; Docket No.
FAA–2022–1403; Project Identifier
MCAI–2022–00122–T.
(a) Effective Date
This airworthiness directive (AD) is
effective June 20, 2023.
(b) Affected ADs
None.
(c) Applicability
This AD applies to De Havilland Aircraft
of Canada Limited Model DHC–8–401 and
–402 airplanes, certificated in any category,
having serial numbers 4001 and 4003
through 4549 inclusive.
(d) Subject
Air Transport Association (ATA) of
America Code 55, Stabilizers.
(e) Unsafe Condition
This AD was prompted by reports of
corrosion on the horizontal stabilizer lower
center skin panel, including a finding of
corrosion where the skin thickness had been
substantially reduced, which affected design
margins. The FAA is issuing this AD to
address possible substantial reduction of skin
panel thickness due to the effects of
corrosion, which could compromise the
structural integrity of the horizontal
stabilizer.
(f) Compliance
Comply with this AD within the
compliance times specified, unless already
done.
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(g) Inspection and Corrective Actions
(1) Within 8,000 flight hours or 48 months,
whichever occurs first, after the effective date
of this AD: Inspect the horizontal stabilizer
lower center skin panel for corrosion in
accordance with Section 3.B. Part A of the
Accomplishment Instructions of De
Havilland Aircraft of Canada Limited Service
Bulletin 84–55–05 Revision C, dated August
19, 2021. If any corrosion is found, before
further flight, do the applicable actions
specified in paragraph (g)(2) or (3) of this AD.
(2) If the corrosion is within the allowable
repair limits as specified in Figure 5 Detail
C of De Havilland Aircraft of Canada Limited
Service Bulletin 84–55–05 Revision C, dated
August 19, 2021, perform the corrosion
rework in accordance with Section 3.B. Part
B of the Accomplishment Instructions of De
Havilland Aircraft of Canada Limited Service
Bulletin 84–55–05 Revision C, dated August
19, 2021.
(3) If the corrosion is beyond the allowable
repair limits as specified in Figure 5 Detail
C of De Havilland Aircraft of Canada Limited
Service Bulletin 84–55–05 Revision C, dated
August 19, 2021, accomplish the action
specified in paragraph (g)(3)(i) or (ii) of this
AD.
(i) Replace the existing horizontal stabilizer
lower center skin panel in accordance with
Section 3.B. Procedure of the
Accomplishment Instructions of De
Havilland Aircraft of Canada Limited Service
Bulletin 84–55–11, dated February 16, 2021.
(ii) Obtain and follow repair instructions
using a method approved by the Manager,
New York ACO Branch, FAA; or Transport
Canada; or De Havilland Aircraft of Canada
Limited’s Transport Canada Design Approval
Organization (DAO). If approved by the DAO,
the approval must include the DAOauthorized signature.
(h) Credit for Previous Actions
(1) This paragraph provides credit for
actions required by paragraphs (g)(1) and (2)
of this AD, if those actions were performed
before the effective date of this AD using De
Havilland Aircraft of Canada Limited Service
Bulletin 84–55–05, Initial Issue, dated
January 12, 2016; De Havilland Aircraft of
Canada Limited Service Bulletin 84–55–05,
Revision A, dated June 3, 2016; or De
Havilland Aircraft of Canada Limited Service
Bulletin 84–55–05, Revision B, dated
February 26, 2021.
(2) This paragraph provides credit for the
actions required by paragraph (g)(2) or (3) of
this AD, if those actions were performed
before the effective date of this AD using any
of the repair drawings (RDs) specified in
figure 1 to paragraph (h) of this AD.
Figure 1 to Paragraph (h)—Repair Drawings
BILLING CODE 4910–13–P
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BILLING CODE 4910–13–C
(i) Additional AD Provisions
The following provisions also apply to this
AD:
(1) Alternative Methods of Compliance
(AMOCs): The Manager, New York ACO
Branch, FAA, has the authority to approve
AMOCs for this AD, if requested using the
procedures found in 14 CFR 39.19. In
accordance with 14 CFR 39.19, send your
request to your principal inspector or
responsible Flight Standards Office, as
appropriate. If sending information directly
to the manager of the certification office,
send it to ATTN: Program Manager,
Continuing Operational Safety, FAA, New
York ACO Branch, 1600 Stewart Avenue,
Suite 410, Westbury, NY 11590; telephone
516–228–7300. Before using any approved
AMOC, notify your appropriate principal
inspector, or lacking a principal inspector,
the manager of the responsible Flight
Standards Office.
(2) Contacting the Manufacturer: For any
requirement in this AD to obtain instructions
from a manufacturer, the instructions must
be accomplished using a method approved
by the Manager, New York ACO Branch,
FAA; or Transport Canada; or De Havilland
Aircraft of Canada Limited’s Transport
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16:03 May 15, 2023
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Canada Design Approval Organization
(DAO). If approved by the DAO, the approval
must include the DAO-authorized signature.
(j) Additional Information
(1) Refer to Transport Canada AD CF–
2022–02, dated January 28, 2022, for related
information. This Transport Canada AD may
be found in the AD docket at regulations.gov
under Docket No. FAA–2022–1403.
(2) For more information about this AD,
contact Yaser Osman, Aerospace Engineer,
Airframe and Propulsion Section, FAA, New
York ACO Branch, 1600 Stewart Avenue,
Suite 410, Westbury, NY 11590; telephone
516–228–7300; email 9-avs-nyaco-cos@
faa.gov.
(3) Service information identified in this
AD that is not incorporated by reference is
available at the addresses specified in
paragraphs (k)(3) and (4) of this AD.
(k) Material Incorporated by Reference
(1) The Director of the Federal Register
approved the incorporation by reference 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.
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31151
(i) De Havilland Aircraft of Canada Limited
Service Bulletin 84–55–05, Revision C, dated
August 19, 2021.
(ii) De Havilland Aircraft of Canada
Limited Service Bulletin 84–55–11, dated
February 16, 2021.
(3) For service information identified in
this AD, contact De Havilland Aircraft of
Canada Limited, Dash 8 Series Customer
Response Centre, 5800 Explorer Drive,
Mississauga, Ontario, L4W 5K9, Canada;
telephone 855–310–1013 or 647–277–5820;
email thd@dehavilland.com; website
dehavilland.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:
www.archives.gov/federal-register/cfr/ibrlocations.html.
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Federal Register / Vol. 88, No. 94 / Tuesday, May 16, 2023 / Rules and Regulations
31152
Federal Register / Vol. 88, No. 94 / Tuesday, May 16, 2023 / Rules and Regulations
Issued on April 8, 2023.
Christina Underwood,
Acting Director, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2023–10333 Filed 5–15–23; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2022–1486; Project
Identifier AD–2022–01026–T; Amendment
39–22418; AD 2023–08–03]
RIN 2120–AA64
Airworthiness Directives; Gulfstream
Aerospace Corporation Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Final rule.
AGENCY:
Background
The FAA is adopting a new
airworthiness directive (AD) for certain
Gulfstream Aerospace Corporation
Model G–1159A and G–1159B airplanes
and all Model G–IV and GIV–X
airplanes. This AD was prompted by a
report that the ground spoiler actuator
installation does not preclude improper
hydraulic line connections that could
result in unintended asymmetrical
spoiler deployment. This AD requires
incorporating corrective actions that
physically prevent improper connection
of the hydraulic lines to the ground
spoiler actuator. The FAA is issuing this
AD to address the unsafe condition on
these products.
DATES: This AD is effective June 20,
2023.
The Director of the Federal Register
approved the incorporation by reference
of certain publications listed in this AD
as of June 20, 2023.
ADDRESSES:
AD Docket: You may examine the AD
docket at regulations.gov under Docket
No. FAA–2022–1486; 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.
Material Incorporated by Reference:
• For service information identified
in this final rule, contact Gulfstream
Aerospace Corporation, Technical
Publications Dept., P.O. Box 2206,
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SUMMARY:
VerDate Sep<11>2014
16:03 May 15, 2023
Savannah, GA 31402–2206; telephone
800–810–4853; email pubs@
gulfstream.com; website
gulfstream.com/en/customer-support/.
• 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 at
regulations.gov under Docket No. FAA–
2022–1486.
FOR FURTHER INFORMATION CONTACT:
Samuel Belete, Aerospace Engineer,
Systems and Equipment Section, FAA,
Atlanta ACO Branch, 1701 Columbia
Avenue, College Park, GA 30337; phone:
404–474–5580; email: 9-ASO-ATLACOADs@faa.gov.
SUPPLEMENTARY INFORMATION:
Jkt 259001
The FAA issued a notice of proposed
rulemaking (NPRM) to amend 14 CFR
part 39 by adding an AD that would
apply to certain Gulfstream Aerospace
Corporation Model G–1159A and G–
1159B airplanes and all Model G–IV and
GIV–X airplanes. The NPRM published
in the Federal Register on November 25,
2022 (87 FR 72422). The NPRM was
prompted by a report, following a fatal
accident involving a Gulfstream Model
G–IV, that the ground spoiler actuator
configuration does not preclude
improper hydraulic line connections
that could result in unintended
asymmetrical spoiler deployment. In the
NPRM, the FAA proposed incorporating
corrective actions that physically
prevent improper connection of the
hydraulic lines to the ground spoiler
actuator. The FAA is issuing this AD to
address improper connection of the
ground spoiler hydraulic lines, which, if
not addressed, could result in
unintended asymmetrical spoiler
deployment leading to loss of control of
the airplane.
Discussion of Final Airworthiness
Directive
Comments
The FAA received comments from the
National Transportation Safety Board
(NTSB). The NTSB supported the NPRM
without change.
The FAA received comments from
Gulfstream Aerospace Corporation. The
following presents the comments
received on the NPRM and the FAA’s
response to each comment.
Request To Clarify Information in the
Preamble
Gulfstream requested that the FAA
revise the description of the incident
PO 00000
Frm 00008
Fmt 4700
Sfmt 4700
that prompted the NPRM. Gulfstream
requested aligning the SUMMARY with the
Background details in the NPRM to state
that the proposed AD was prompted by
a report that the ground spoiler actuator
installation ‘‘does not preclude’’
improper hydraulic line connections,
instead of stating that the installation
‘‘allows’’ such improper connections.
The FAA agrees with the suggested
revision and has revised the SUMMARY of
this final rule accordingly.
Request To Clarify the Total Affected
Airplanes (Cost of Compliance)
Gulfstream requested that the FAA
revise the Cost of Compliance section of
the NPRM to reflect a total population
of affected airplanes of 1,045. This
includes airplanes of all registries. The
‘‘Cost of Compliance’’ section in the
NPRM identified a total of 550 airplanes
of U.S. Registry as affected.
The FAA does not agree because the
‘‘Cost of Compliance’’ section accounts
for the cost of AD compliance only for
affected airplanes that are certificated by
the FAA and included on the U.S.
Registry. Airplanes registered in other
countries are regulated by their civil
aviation authorities, who may or may
not adopt similar rulemaking. The FAA
has not changed this final rule as a
result of this comment.
Request To Change Compliance Time
Gulfstream requested that the FAA
change the compliance time for Model
G–1159A, G–1159B, and G–IV airplanes
from 18 months after the effective date
of this AD to 18 months from March 3,
2023. Gulfstream stated that if the AD
becomes effective prior to March 3,
2023, it will shorten the FAA and
Gulfstream agreed-on corrective action
timelines, and would increase an
already challenging compliance
window.
The FAA finds it unnecessary to
change the compliance time. The
effective date of this AD is after the
requested reference date of March 3,
2023, so this AD will provide the full 18
months for compliance for those
airplanes.
Additional Change to This Final Rule
Gulfstream has developed and
published service information that will
address the unsafe condition for certain
airplanes identified in this final rule.
This service information is described
under ‘‘Related Service Information
under 1 CFR part 51’’ in this final rule.
After reviewing this service information,
the FAA determined that it is acceptable
to use for compliance with the
requirements of this AD for the
identified airplanes. The FAA has
E:\FR\FM\16MYR1.SGM
16MYR1
]]>Agencies
[Federal Register Volume 88, Number 94 (Tuesday, May 16, 2023)]
[Rules and Regulations]
[Pages 31148-31152]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-10333]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-1403; Project Identifier MCAI-2022-00122-T;
Amendment 39-22408; AD 2023-07-06]
RIN 2120-AA64
Airworthiness Directives; De Havilland Aircraft of Canada Limited
(Type Certificate Previously Held by Bombardier, Inc.) Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain De Havilland Aircraft of Canada Limited Model DHC-8-401 and -
402 airplanes. This AD was prompted by reports of corrosion on the
horizontal stabilizer lower center skin panel, including a finding of
corrosion where the skin thickness had been substantially reduced,
which affected design margins. This AD requires inspecting the
horizontal stabilizer lower center skin panel for corrosion, and
reworking, repairing, or replacing the lower center skin panel if
necessary. The FAA is issuing this AD to address the unsafe condition
on these products.
DATES: This AD is effective June 20, 2023.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of June 20,
2023.
ADDRESSES:
AD Docket: You may examine the AD docket at regulations.gov under
Docket No. FAA-2022-1403; 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, the mandatory continuing airworthiness
information (MCAI), 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.
Material Incorporated by Reference:
For service information identified in this final rule,
contact De Havilland Aircraft of Canada Limited, Dash 8 Series Customer
Response Centre, 5800 Explorer Drive, Mississauga, Ontario, L4W 5K9,
Canada; telephone 855-310-1013 or 647-277-5820; email
dehavilland.com">[email protected]dehavilland.com; website dehavilland.com.
[[Page 31149]]
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 at
regulations.gov under Docket No. FAA-2022-1403.
FOR FURTHER INFORMATION CONTACT: Yaser Osman, Aerospace Engineer,
Airframe and Propulsion Section, FAA, New York ACO Branch, 1600 Stewart
Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7300; email [email protected].
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to certain De Havilland
Aircraft of Canada Limited Model DHC-8-401 and -402 airplanes. The NPRM
published in the Federal Register on November 4, 2022 (87 FR 66619).
The NPRM was prompted by AD CF-2022-02, dated January 28, 2022, issued
by Transport Canada, which is the aviation authority for Canada
(referred to after this as the MCAI). The MCAI states that there have
been reports of corrosion on the horizontal stabilizer lower center
skin panel, including a finding of corrosion where the skin thickness
had been substantially reduced, affecting design margins. The root
cause was found to be inconsistent chemical processing of the lower
center skin panel, with missing anodizing layer and primer on some
areas of the skin panel surface. A substantial reduction of skin panel
thickness due to the effects of corrosion will compromise the
structural integrity of the horizontal stabilizer.
In the NPRM, the FAA proposed to require inspecting the horizontal
stabilizer lower center skin panel for corrosion, and reworking,
repairing, or replacing the lower center skin panel if necessary.
The FAA is issuing this AD to address possible reduction of skin
panel thickness due to the effects of corrosion, which could compromise
the structural integrity of the horizontal stabilizer. You may examine
the MCAI in the AD docket at regulations.gov under Docket No. FAA-2022-
1403.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from Air Line Pilots Association,
International (ALPA) who supported the NPRM without change.
The FAA received additional comments from Horizon Air. The
following presents the comment received on the NPRM and the FAA's
response to the comment.
Request To Limit Certain Requirements
Horizon Air requested that paragraph (g)(3)(i) of the proposed AD
require only Section 3.B. (Procedure) of the Accomplishment
Instructions of De Havilland Aircraft of Canada Limited Service
Bulletin 84-55-11, dated February 16, 2021. Horizon Air stated that
requiring the job set-up and close out sections restricts an operator's
ability to perform other maintenance in conjunction with the
incorporation of the service information. Horizon Air added that the
job set-up and close out sections do not directly correct the unsafe
conditions.
The FAA agrees with the request to limit the requirements to
simplify the procedure and allow the performance of other maintenance
in conjunction with the required actions of this AD. Paragraph
(g)(3)(i) of this AD has been changed to limit the requirements as
requested.
Conclusion
This product has been approved by the aviation authority of another
country and is approved for operation in the United States. Pursuant to
the FAA's bilateral agreement with this State of Design Authority, it
has notified the FAA of the unsafe condition described in the MCAI
referenced above. The FAA reviewed the relevant data, considered the
comments received, and determined that air safety requires adopting
this AD as proposed. Accordingly, the FAA is issuing this AD to address
the unsafe condition on this product. Except for minor editorial
changes, and any other changes described previously, this AD is adopted
as proposed in the NPRM. None of the changes will increase the economic
burden on any operator.
Related Service Information Under 1 CFR Part 51
De Havilland Aircraft of Canada Limited has issued Service Bulletin
84-55-05, Revision C, dated August 19, 2021. This service information
describes procedures for inspecting the horizontal stabilizer lower
center skin panel for corrosion, and, depending on the level of
corrosion, reworking or repairing the horizontal stabilizer lower
center skin panel.
De Havilland Aircraft of Canada Limited has also issued Service
Bulletin 84-55-11, dated February 16, 2021. This service information
describes procedures for replacing the horizontal stabilizer lower
center skin panel.
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 56 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
Cost per Cost on U.S.
Labor cost Parts cost product operators
----------------------------------------------------------------------------------------------------------------
108 work-hours x $85 per hour = $9,180....................... $0 $9,180 $514,080
----------------------------------------------------------------------------------------------------------------
The FAA estimates the following costs to do any necessary on-
condition replacements that would be required based on the results of
any required actions. The FAA has no way of determining the number of
aircraft that might need this on-condition replacement:
[[Page 31150]]
Estimated Costs of On-Condition Actions
------------------------------------------------------------------------
Cost per
Labor cost Parts cost product
------------------------------------------------------------------------
108 work-hours x $85 per hour = $9,180 $21,449 $30,629
------------------------------------------------------------------------
The FAA has received no definitive data on which to base the cost
estimates for the on-condition repairs or rework specified in this AD.
The FAA has included all known costs in its cost estimate.
According to the manufacturer, however, some or all of the costs of
this AD may be covered under warranty, thereby reducing the cost impact
on affected operators.
Authority for This Rulemaking
Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, section 106, describes the
authority of the FAA Administrator. Subtitle VII: Aviation Programs,
describes in more detail the scope of the Agency's authority.
The FAA is issuing this rulemaking under the authority described in
Subtitle VII, Part A, Subpart III, Section 44701: General requirements.
Under that section, Congress charges the FAA with promoting safe flight
of civil aircraft in air commerce by prescribing regulations for
practices, methods, and procedures the Administrator finds necessary
for safety in air commerce. This regulation is within the scope of that
authority because it addresses an unsafe condition that is likely to
exist or develop on products identified in this rulemaking action.
Regulatory Findings
This AD will not have federalism implications under Executive Order
13132. This AD will not have a substantial direct effect on the States,
on the relationship between the national government and the States, or
on the distribution of power and responsibilities among the various
levels of government.
For the reasons discussed above, I certify that this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Will not affect intrastate aviation in Alaska, and
(3) Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
The Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 14 CFR part 39 as follows:
PART 39--AIRWORTHINESS DIRECTIVES
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:
2023-07-06 De Havilland Aircraft of Canada Limited (Type Certificate
Previously Held by Bombardier, Inc.): Amendment 39-22408; Docket No.
FAA-2022-1403; Project Identifier MCAI-2022-00122-T.
(a) Effective Date
This airworthiness directive (AD) is effective June 20, 2023.
(b) Affected ADs
None.
(c) Applicability
This AD applies to De Havilland Aircraft of Canada Limited Model
DHC-8-401 and -402 airplanes, certificated in any category, having
serial numbers 4001 and 4003 through 4549 inclusive.
(d) Subject
Air Transport Association (ATA) of America Code 55, Stabilizers.
(e) Unsafe Condition
This AD was prompted by reports of corrosion on the horizontal
stabilizer lower center skin panel, including a finding of corrosion
where the skin thickness had been substantially reduced, which
affected design margins. The FAA is issuing this AD to address
possible substantial reduction of skin panel thickness due to the
effects of corrosion, which could compromise the structural
integrity of the horizontal stabilizer.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Inspection and Corrective Actions
(1) Within 8,000 flight hours or 48 months, whichever occurs
first, after the effective date of this AD: Inspect the horizontal
stabilizer lower center skin panel for corrosion in accordance with
Section 3.B. Part A of the Accomplishment Instructions of De
Havilland Aircraft of Canada Limited Service Bulletin 84-55-05
Revision C, dated August 19, 2021. If any corrosion is found, before
further flight, do the applicable actions specified in paragraph
(g)(2) or (3) of this AD.
(2) If the corrosion is within the allowable repair limits as
specified in Figure 5 Detail C of De Havilland Aircraft of Canada
Limited Service Bulletin 84-55-05 Revision C, dated August 19, 2021,
perform the corrosion rework in accordance with Section 3.B. Part B
of the Accomplishment Instructions of De Havilland Aircraft of
Canada Limited Service Bulletin 84-55-05 Revision C, dated August
19, 2021.
(3) If the corrosion is beyond the allowable repair limits as
specified in Figure 5 Detail C of De Havilland Aircraft of Canada
Limited Service Bulletin 84-55-05 Revision C, dated August 19, 2021,
accomplish the action specified in paragraph (g)(3)(i) or (ii) of
this AD.
(i) Replace the existing horizontal stabilizer lower center skin
panel in accordance with Section 3.B. Procedure of the
Accomplishment Instructions of De Havilland Aircraft of Canada
Limited Service Bulletin 84-55-11, dated February 16, 2021.
(ii) Obtain and follow repair instructions using a method
approved by the Manager, New York ACO Branch, FAA; or Transport
Canada; or De Havilland Aircraft of Canada Limited's Transport
Canada Design Approval Organization (DAO). If approved by the DAO,
the approval must include the DAO-authorized signature.
(h) Credit for Previous Actions
(1) This paragraph provides credit for actions required by
paragraphs (g)(1) and (2) of this AD, if those actions were
performed before the effective date of this AD using De Havilland
Aircraft of Canada Limited Service Bulletin 84-55-05, Initial Issue,
dated January 12, 2016; De Havilland Aircraft of Canada Limited
Service Bulletin 84-55-05, Revision A, dated June 3, 2016; or De
Havilland Aircraft of Canada Limited Service Bulletin 84-55-05,
Revision B, dated February 26, 2021.
(2) This paragraph provides credit for the actions required by
paragraph (g)(2) or (3) of this AD, if those actions were performed
before the effective date of this AD using any of the repair
drawings (RDs) specified in figure 1 to paragraph (h) of this AD.
Figure 1 to Paragraph (h)--Repair Drawings
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[GRAPHIC] [TIFF OMITTED] TR16MY23.000
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(i) Additional AD Provisions
The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, New
York ACO Branch, FAA, has the authority to approve AMOCs for this
AD, if requested using the procedures found in 14 CFR 39.19. In
accordance with 14 CFR 39.19, send your request to your principal
inspector or responsible Flight Standards Office, as appropriate. If
sending information directly to the manager of the certification
office, send it to ATTN: Program Manager, Continuing Operational
Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; telephone 516-228-7300. Before using any
approved AMOC, notify your appropriate principal inspector, or
lacking a principal inspector, the manager of the responsible Flight
Standards Office.
(2) Contacting the Manufacturer: For any requirement in this AD
to obtain instructions from a manufacturer, the instructions must be
accomplished using a method approved by the Manager, New York ACO
Branch, FAA; or Transport Canada; or De Havilland Aircraft of Canada
Limited's Transport Canada Design Approval Organization (DAO). If
approved by the DAO, the approval must include the DAO-authorized
signature.
(j) Additional Information
(1) Refer to Transport Canada AD CF-2022-02, dated January 28,
2022, for related information. This Transport Canada AD may be found
in the AD docket at regulations.gov under Docket No. FAA-2022-1403.
(2) For more information about this AD, contact Yaser Osman,
Aerospace Engineer, Airframe and Propulsion Section, FAA, New York
ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7300; email [email protected].
(3) Service information identified in this AD that is not
incorporated by reference is available at the addresses specified in
paragraphs (k)(3) and (4) of this AD.
(k) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference 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) De Havilland Aircraft of Canada Limited Service Bulletin 84-
55-05, Revision C, dated August 19, 2021.
(ii) De Havilland Aircraft of Canada Limited Service Bulletin
84-55-11, dated February 16, 2021.
(3) For service information identified in this AD, contact De
Havilland Aircraft of Canada Limited, Dash 8 Series Customer
Response Centre, 5800 Explorer Drive, Mississauga, Ontario, L4W 5K9,
Canada; telephone 855-310-1013 or 647-277-5820; email
dehavilland.com">[email protected]dehavilland.com; website dehavilland.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: www.archives.gov/federal-register/cfr/ibr-locations.html.
[[Page 31152]]
Issued on April 8, 2023.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2023-10333 Filed 5-15-23; 8:45 am]
BILLING CODE 4910-13-P
