Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes, 17682-17685 [2023-05705]
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17682
Federal Register / Vol. 88, No. 57 / Friday, March 24, 2023 / Rules and Regulations
(ii) Induction of an engine into a shop
solely for removal or replacement of the stage
1 fan disk;
(iii) Induction of an engine into a shop
solely for replacement of the turbine rear
frame;
(iv) Induction of an engine into a shop
solely for replacement of the accessory
gearbox or transfer gearbox, or both; and
(v) Induction of an engine into a shop
solely for replacement of the fan forward
case.
(4) A raw EGT trend data point above the
smoothed average is a confirmed temperature
reading over the rolling average of EGT
readings that is not a result of EGT system
error.
You may take credit for the actions
required by paragraph (g) of this AD if they
were performed before the effective date of
this AD using GE Service Bulletin (SB) No.
CF6–50 SB 72–1315, Initial Issue, dated June
3, 2011, or GE SB No. CF6–50 SB 72–1315,
Revision 1, dated June 30, 2011.
(l) Alternative Methods of Compliance
(AMOCs)
(1) The Manager, ECO 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 the attention of the person
identified in paragraph (m) of this AD and
email it to: ANE-AD-AMOC@faa.gov.
(2) 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.
(3) AMOCs approved previously for AD
2010–12–10, Amendment 39–16331 (75 FR
32649, June 9, 2010); AD 2011–02–07,
Amendment 39–16580 (76 FR 6323, February
4, 2011); or AD 2011–18–01, Amendment 39–
16783 (76 FR 52213, August 22, 2011) are
approved as AMOCs for the corresponding
provisions of this AD.
(m) Related Information
For more information about this AD,
contact Sungmo Cho, Aviation Safety
Engineer, ECO Branch, FAA, 1200 District
Avenue, Burlington, MA 01803; phone: (781)
238–7241; email: Sungmo.D.Cho@faa.gov.
(n) Material Incorporated by Reference
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None.
Issued on February 17, 2023.
Christina Underwood,
Acting Director, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2023–05472 Filed 3–23–23; 8:45 am]
BILLING CODE 4910–13–P
16:01 Mar 23, 2023
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2022–0679; Project
Identifier MCAI–2021–01213–T; Amendment
39–22392; AD 2023–06–06]
RIN 2120–AA64
Airworthiness Directives; MHI RJ
Aviation ULC (Type Certificate
Previously Held by Bombardier, Inc.)
Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Final rule.
AGENCY:
(k) Credit for Previous Actions
VerDate Sep<11>2014
DEPARTMENT OF TRANSPORTATION
Jkt 259001
The FAA is adopting a new
airworthiness directive (AD) for all MHI
RJ Aviation ULC 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, Model CL–600–
2D24 (Regional Jet Series 900) airplanes,
and Model CL–600–2E25 (Regional Jet
Series 1000) airplanes. This AD was
prompted by a determination that new
and more restrictive airworthiness
limitations are necessary. This AD
requires revising the existing
maintenance or inspection program, as
applicable, to incorporate two aircraft
maintenance manual (AMM) tasks. The
FAA is issuing this AD to address the
unsafe condition on these products.
DATES: This AD is effective April 28,
2023.
SUMMARY:
AD Docket: You may
examine the AD docket at
regulations.gov under Docket No. FAA–
2022–0679; 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.
FOR FURTHER INFORMATION CONTACT:
Chirayu A. Gupta, 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:
ADDRESSES:
PO 00000
Frm 00004
Fmt 4700
Sfmt 4700
Background
The FAA issued a notice of proposed
rulemaking (NPRM) to amend 14 CFR
part 39 by adding an AD that would
apply to all MHI RJ Aviation ULC 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, Model CL–600–
2D24 (Regional Jet Series 900) airplanes,
and Model CL–600–2E25 (Regional Jet
Series 1000) airplanes. The NPRM
published in the Federal Register on
June 16, 2022 (87 FR 36269). The NPRM
was prompted by AD CF–2021–38,
dated November 5, 2021 (TCCA AD CF–
2021–38), issued by Transport Canada,
which is the aviation authority for
Canada. TCCA AD CF–2021–38 states
that a report was received of the
emergency ram air valve part number
GG670–95019–1 stuck in closed or
partially open positions. An
investigation revealed that the
emergency ram air valve is failing due
to corrosion of multiple subcomponents, which causes an increase
in the breakaway torque that cannot be
overcome by the valve actuator.
In the NPRM, the FAA proposed to
require revising the existing
maintenance or inspection program, as
applicable, to incorporate new or more
restrictive airworthiness limitations.
The FAA issued a supplemental
notice of proposed rulemaking (SNPRM)
to amend 14 CFR part 39 by adding an
AD that would apply to all MHI RJ
Aviation ULC 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, Model CL–600–
2D24 (Regional Jet Series 900) airplanes,
and Model CL–600–2E25 (Regional Jet
Series 1000) airplanes. The SNPRM
published in the Federal Register on
January 13, 2023 (88 FR 2279). The
SNPRM was prompted by a
determination that the existing
maintenance or inspection program, as
applicable, must be revised to
incorporate two AMM tasks. In
addition, Transport Canada revised AD
CF–2021–38, dated November 5, 2021,
and issued Transport Canada AD CF–
2021–38R1, dated May 25, 2022 (TCCA
AD CF–2021–38R1). In the SNPRM, the
FAA proposed to require revising the
existing maintenance or inspection
program, as applicable, to incorporate
two AMM tasks. The FAA is issuing this
AD to address in-service reports of
emergency ram air valve part number
(P/N) GG670–95019–1 stuck in closed or
partially open positions, which, if not
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24MRR1
Federal Register / Vol. 88, No. 57 / Friday, March 24, 2023 / Rules and Regulations
corrected could result in a complete loss
of outside air supply, leading to an
increase in flight deck and cabin
temperatures and a possible increased
level of contaminated air (carbon
monoxide, carbon dioxide, or ozone).
You may examine TCCA AD CF–
2021–38 and TCCA AD CF–2021–38R1
in the AD docket at regulations.gov
under Docket No. FAA–2022–0679.
Discussion of Final Airworthiness
Directive
Comments
The FAA received no comments on
the SNPRM or on the determination of
the cost to the public.
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 TCCA AD referenced above. The
FAA reviewed the relevant data 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, this AD is adopted as proposed
in the SNPRM. None of the changes will
increase the economic burden on any
operator.
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Costs of Compliance
The FAA estimates that this AD
affects 1,158 airplanes of U.S. registry.
The FAA estimates the following costs
to comply with this AD:
The FAA has determined that revising
the maintenance or inspection program
takes an average of 90 work-hours per
operator, although the agency
recognizes that this number may vary
from operator to operator. Since
operators incorporate maintenance or
inspection program changes for their
affected fleet(s), the FAA has
determined that a per-operator estimate
is more accurate than a per-airplane
estimate. Therefore, the agency
estimates the average total cost per
operator to be $7,650 (90 work-hours ×
$85 per work-hour).
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
VerDate Sep<11>2014
16:01 Mar 23, 2023
Jkt 259001
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.
17683
2023–06–06 MHI RJ Aviation ULC (Type
Certificate Previously Held by
Bombardier, Inc.): Amendment 39–
22392; Docket No. FAA–2022–0679;
Project Identifier MCAI–2021–01213–T.
(a) Effective Date
This airworthiness directive (AD) is
effective April 28, 2023.
(b) Affected ADs
None.
(c) Applicability
This AD applies to MHI RJ Aviation ULC
airplanes, certificated in any category,
identified in paragraphs (c)(1) through (5) of
this AD.
(1) Model CL–600–2C10 (Regional Jet
Series 700, 701 & 702) airplanes.
(2) Model CL–600–2C11 (Regional Jet
Series 550) airplanes.
(3) Model CL–600–2D15 (Regional Jet
Series 705) airplanes.
(4) Model CL–600–2D24 (Regional Jet
Series 900) airplanes.
(5) Model CL–600–2E25 (Regional Jet
Series 1000) airplanes.
(d) Subject
Air Transport Association (ATA) of
America Code: 21, Air conditioning.
(e) Reason
This AD was prompted by a determination
that the existing maintenance or inspection
program, as applicable, must be revised to
incorporate two aircraft maintenance manual
(AMM) tasks. The FAA is issuing this AD to
address in-service reports of emergency ram
air valve part number (P/N) GG670–95019–1
stuck in closed or partially open positions,
which, if not corrected could result in a
complete loss of outside air supply, leading
to an increase in flight deck and cabin
temperatures and a possible increased level
of contaminated air (carbon monoxide,
carbon dioxide, or ozone).
The Amendment
Accordingly, under the authority
delegated to me by the Administrator,
the FAA amends 14 CFR part 39 as
follows:
(f) Compliance
PART 39—AIRWORTHINESS
DIRECTIVES
(1) Within 90 days after the effective date
of this AD, revise the existing maintenance
or inspection program, as applicable, to
incorporate the information specified in
figure 1 to the introductory text of paragraph
(g)(1) of this AD. The initial compliance time
for doing the task is at the applicable time
specified in paragraph (g)(1)(i) or (ii) of this
AD.
Figure 1 to the introductory text of paragraph
(g)(1)—AMM Task for the Ram-Air Valve
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:
■
PO 00000
Frm 00005
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Comply with this AD within the
compliance times specified, unless already
done.
(g) Maintenance or Inspection Program
Revision
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Federal Register / Vol. 88, No. 57 / Friday, March 24, 2023 / Rules and Regulations
(i) For airplanes that have accumulated less
than 1,800 flight hours since the last
operational check of the ram air shutoff valve
was performed as specified in AMM Task
21–52–04–710–801–A01, and for airplanes
that have accumulated less than 1,800 flight
hours from the date of issuance of the
original airworthiness certificate or original
export certificate of airworthiness: Within 90
days after the effective date of this AD, or
before accumulating 1,800 total flight hours,
whichever occurs later.
(ii) For airplanes that have accumulated
1,800 flight hours or more since the last
operational check of the ram air shutoff valve
was performed as specified in AMM Task
21–52–04–710–801–A01, and for airplanes
that have accumulated 1,800 flight hours or
more since the date of issuance of the
original airworthiness certificate or original
export certificate of airworthiness and for
which no operational check of the valve has
been performed: Within 90 days after the
effective date of this AD or before
accumulating 3,000 total flight hours,
whichever occurs later.
(2) Within 90 days after the effective date
of this AD, revise the existing maintenance
or inspection program, as applicable, to
incorporate the information specified in
figure 2 to the introductory text of paragraph
(g)(2) of this AD. The initial compliance time
for doing the task is at the applicable time
specified in paragraph (g)(2)(i) or (ii) of this
AD.
Figure 2 to the introductory text of paragraph
(g)(2)—AMM Task for the Pack Discharge
and Ram-Air Supply Ducts
(i) For airplanes that have accumulated less
than 17,600 flight hours since the last
detailed inspection of the pack discharge and
ram air supply ducts was performed as
specified in AMM Task 21–51–00–220–801–
A01, and for airplanes that have accumulated
less than 17,600 flight hours since the date
of issuance of the original airworthiness
certificate or original export certificate of
airworthiness: Within 90 days after the
effective date of this AD, or before
accumulating 17,600 total flight hours,
whichever occurs later.
(ii) For airplanes that have accumulated
17,600 flight hours or more since the last
detailed inspection of the pack discharge and
ram air supply ducts as specified in AMM
Task 21–51–00–220–801–A01, and for
airplanes that have accumulated 17,600 flight
hours or more since the date of issuance of
the original airworthiness certificate or
original export certificate of airworthiness,
and for which no detailed inspection of the
pack discharge and ram air supply ducts has
been performed: Within 90 days after the
effective date of this AD.
required by paragraph (g) of this AD, no
alternative actions (e.g., inspections) or
intervals, may be used unless the actions and
intervals are approved as an alternative
method of compliance (AMOC) in
accordance with the procedures specified in
paragraph (i)(1) of this AD.
VerDate Sep<11>2014
16:01 Mar 23, 2023
Jkt 259001
After the existing maintenance or
inspection program has been revised as
PO 00000
Frm 00006
Fmt 4700
Sfmt 4700
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
E:\FR\FM\24MRR1.SGM
24MRR1
ER24MR23.001</GPH>
(h) No Alternative Actions or Intervals
(i) Other FAA AD Provisions
ER24MR23.000</GPH>
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17684
Federal Register / Vol. 88, No. 57 / Friday, March 24, 2023 / Rules and Regulations
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 Civil Aviation
(TCCA); or MHI RJ Aviation ULC’s TCCA
Design Approval Organization (DAO). If
approved by the DAO, the approval must
include the DAO-authorized signature.
(j) Additional Information
(1) Refer to Transport Canada AD CF–
2021–38R1, dated May 25, 2022, for related
information. This Transport Canada AD may
be found in the AD docket at regulations.gov
under Docket No. FAA–2022–0679.
(2) For more information about this AD,
contact Chirayu A. Gupta, 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-nyacocos@faa.gov.
(k) Material Incorporated by Reference
None.
Issued on March 15, 2023.
Christina Underwood,
Acting Director, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2023–05705 Filed 3–23–23; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2022–0814; Project
Identifier AD–2022–00205–A; Amendment
39–22397; AD 2023–06–11]
RIN 2120–AA64
Airworthiness Directives; Viking Air
Limited (Type Certificate Previously
Held by Bombardier Inc. and de
Havilland Inc.) Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Final rule.
lotter on DSK11XQN23PROD with RULES1
AGENCY:
The FAA is adopting a new
airworthiness directive (AD) for Viking
Air Limited (type certificate previously
held by Bombardier Inc. and de
SUMMARY:
VerDate Sep<11>2014
16:01 Mar 23, 2023
Jkt 259001
Havilland Inc.) Model DHC–2 Mk. I
airplanes with Supplemental Type
Certificate (STC) No. SA01324CH
installed. This AD was prompted by a
report of damage in the main wing spar.
This AD requires inspecting the wing
structure for damage (drill starts,
corrosion, cracks, and improperly
installed fasteners), repairing damage,
and reporting the inspection results if
necessary. The FAA is issuing this AD
to address the unsafe condition on these
products.
DATES: This AD is effective April 28,
2023.
ADDRESSES: AD Docket: You may
examine the AD docket at
regulations.gov by searching for and
locating Docket No. FAA–2022–0814; 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: Tim
Eichor, Aviation Safety Engineer,
Chicago ACO Branch, FAA, 2300 E
Devon Avenue, Des Plaines, IL 60018;
phone: (847) 294–7141; email:
tim.d.eichor@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 Viking Air Limited (type
certificate previously held by
Bombardier Inc. and de Havilland Inc.)
Model DHC–2 Mk. I airplanes with STC
No. SA01324CH installed. The NPRM
published in the Federal Register on
July 8, 2022 (87 FR 40749). The NPRM
was prompted by a report that during an
annual inspection of a Viking Air
Limited Model DHC–2 Mk. I airplane, a
gap was noted between the doubler and
wing near station 42.5, requiring partial
removal of the doubler and removal of
the sealant between the doubler and the
wing skin. Further inspection of the
internal wing structure of that area with
a borescope found damage in the
forward spar caused by a drill during
initial installation of the doubler. The
doubler was installed as part of Wipaire,
Inc. (Wipaire), STC No. SA01324CH.
Inspection of the rest of the operator’s
fleet of airplanes with STC No.
SA01324CH installed found a total of 7
out of 28 wings with drill start damage
in the same area. Later inspections on
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Fmt 4700
Sfmt 4700
17685
these same airplanes on the outboard
end of the doubler installation revealed
improperly installed fasteners. As only
a small fraction of the affected fleet has
been inspected, the possible extent of
damage in the field is unknown.
Accordingly, the FAA determined that
in addition to inspecting for drill starts
and improperly installed fasteners,
inspecting for corrosion and cracks is
necessary. Damage of the main
structural members of the wing could
adversely affect the structural integrity
of the airplane and could result in loss
of control of the airplane.
Discussion of Final Airworthiness
Directive
Comments
The FAA received comments from
Wipaire. The following presents the
comments received on the NPRM and
the FAA’s response to each comment.
Request Regarding Changing the Unsafe
Condition
Wipaire requested that the unsafe
condition statement in the Background
section and paragraph (e) of the
proposed AD be changed from ‘‘Damage
of the main structural members of the
wing could adversely affect the
structural integrity of the airplane and
could result in loss of control of the
airplane’’ and suggested the wording
‘‘This condition, if not addressed, could
have a slight adverse effect on the
structural integrity of the airplane.’’
Wipaire stated that although the unsafe
condition statement in the NPRM is
technically correct, it is misleading to
operators affected by the proposed AD.
Wipaire noted that a structural analysis
performed and approved by an FAA
Designated Engineering Representative
(DER) showed that this type of damage
at this location had no appreciable effect
on the overall strength of the spar.
Wipaire explained that the doubler is
installed inboard of the wing strut on
the upper section of the wing and in this
configuration the spar is predominately
loaded compression so crack growth
would be slow and detectable.
The FAA disagrees with the
commenter’s request. As only a small
fraction of the affected fleet has been
inspected, the extent of damage in the
field is unknown. Accordingly, it is not
accurate to say that the damage of the
main structural members of the wing
will not adversely affect the structural
integrity of the wing, resulting in both
the loss of the wing and loss of control
of the airplane. No change was made to
this AD regarding this issue.
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]]>Agencies
[Federal Register Volume 88, Number 57 (Friday, March 24, 2023)]
[Rules and Regulations]
[Pages 17682-17685]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-05705]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-0679; Project Identifier MCAI-2021-01213-T;
Amendment 39-22392; AD 2023-06-06]
RIN 2120-AA64
Airworthiness Directives; MHI RJ Aviation ULC (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 all
MHI RJ Aviation ULC 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, Model CL-600-
2D24 (Regional Jet Series 900) airplanes, and Model CL-600-2E25
(Regional Jet Series 1000) airplanes. This AD was prompted by a
determination that new and more restrictive airworthiness limitations
are necessary. This AD requires revising the existing maintenance or
inspection program, as applicable, to incorporate two aircraft
maintenance manual (AMM) tasks. The FAA is issuing this AD to address
the unsafe condition on these products.
DATES: This AD is effective April 28, 2023.
ADDRESSES: AD Docket: You may examine the AD docket at regulations.gov
under Docket No. FAA-2022-0679; 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.
FOR FURTHER INFORMATION CONTACT: Chirayu A. Gupta, 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 all MHI RJ Aviation ULC
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, Model CL-600-2D24 (Regional Jet
Series 900) airplanes, and Model CL-600-2E25 (Regional Jet Series 1000)
airplanes. The NPRM published in the Federal Register on June 16, 2022
(87 FR 36269). The NPRM was prompted by AD CF-2021-38, dated November
5, 2021 (TCCA AD CF-2021-38), issued by Transport Canada, which is the
aviation authority for Canada. TCCA AD CF-2021-38 states that a report
was received of the emergency ram air valve part number GG670-95019-1
stuck in closed or partially open positions. An investigation revealed
that the emergency ram air valve is failing due to corrosion of
multiple sub-components, which causes an increase in the breakaway
torque that cannot be overcome by the valve actuator.
In the NPRM, the FAA proposed to require revising the existing
maintenance or inspection program, as applicable, to incorporate new or
more restrictive airworthiness limitations.
The FAA issued a supplemental notice of proposed rulemaking (SNPRM)
to amend 14 CFR part 39 by adding an AD that would apply to all MHI RJ
Aviation ULC 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, Model CL-600-2D24
(Regional Jet Series 900) airplanes, and Model CL-600-2E25 (Regional
Jet Series 1000) airplanes. The SNPRM published in the Federal Register
on January 13, 2023 (88 FR 2279). The SNPRM was prompted by a
determination that the existing maintenance or inspection program, as
applicable, must be revised to incorporate two AMM tasks. In addition,
Transport Canada revised AD CF-2021-38, dated November 5, 2021, and
issued Transport Canada AD CF-2021-38R1, dated May 25, 2022 (TCCA AD
CF-2021-38R1). In the SNPRM, the FAA proposed to require revising the
existing maintenance or inspection program, as applicable, to
incorporate two AMM tasks. The FAA is issuing this AD to address in-
service reports of emergency ram air valve part number (P/N) GG670-
95019-1 stuck in closed or partially open positions, which, if not
[[Page 17683]]
corrected could result in a complete loss of outside air supply,
leading to an increase in flight deck and cabin temperatures and a
possible increased level of contaminated air (carbon monoxide, carbon
dioxide, or ozone).
You may examine TCCA AD CF-2021-38 and TCCA AD CF-2021-38R1 in the
AD docket at regulations.gov under Docket No. FAA-2022-0679.
Discussion of Final Airworthiness Directive
Comments
The FAA received no comments on the SNPRM or on the determination
of the cost to the public.
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 TCCA AD
referenced above. The FAA reviewed the relevant data 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, this AD is adopted as proposed in
the SNPRM. None of the changes will increase the economic burden on any
operator.
Costs of Compliance
The FAA estimates that this AD affects 1,158 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
The FAA has determined that revising the maintenance or inspection
program takes an average of 90 work-hours per operator, although the
agency recognizes that this number may vary from operator to operator.
Since operators incorporate maintenance or inspection program changes
for their affected fleet(s), the FAA has determined that a per-operator
estimate is more accurate than a per-airplane estimate. Therefore, the
agency estimates the average total cost per operator to be $7,650 (90
work-hours x $85 per work-hour).
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:
2023-06-06 MHI RJ Aviation ULC (Type Certificate Previously Held by
Bombardier, Inc.): Amendment 39-22392; Docket No. FAA-2022-0679;
Project Identifier MCAI-2021-01213-T.
(a) Effective Date
This airworthiness directive (AD) is effective April 28, 2023.
(b) Affected ADs
None.
(c) Applicability
This AD applies to MHI RJ Aviation ULC airplanes, certificated
in any category, identified in paragraphs (c)(1) through (5) of this
AD.
(1) Model CL-600-2C10 (Regional Jet Series 700, 701 & 702)
airplanes.
(2) Model CL-600-2C11 (Regional Jet Series 550) airplanes.
(3) Model CL-600-2D15 (Regional Jet Series 705) airplanes.
(4) Model CL-600-2D24 (Regional Jet Series 900) airplanes.
(5) Model CL-600-2E25 (Regional Jet Series 1000) airplanes.
(d) Subject
Air Transport Association (ATA) of America Code: 21, Air
conditioning.
(e) Reason
This AD was prompted by a determination that the existing
maintenance or inspection program, as applicable, must be revised to
incorporate two aircraft maintenance manual (AMM) tasks. The FAA is
issuing this AD to address in-service reports of emergency ram air
valve part number (P/N) GG670-95019-1 stuck in closed or partially
open positions, which, if not corrected could result in a complete
loss of outside air supply, leading to an increase in flight deck
and cabin temperatures and a possible increased level of
contaminated air (carbon monoxide, carbon dioxide, or ozone).
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Maintenance or Inspection Program Revision
(1) Within 90 days after the effective date of this AD, revise
the existing maintenance or inspection program, as applicable, to
incorporate the information specified in figure 1 to the
introductory text of paragraph (g)(1) of this AD. The initial
compliance time for doing the task is at the applicable time
specified in paragraph (g)(1)(i) or (ii) of this AD.
Figure 1 to the introductory text of paragraph (g)(1)--AMM Task for
the Ram-Air Valve
[[Page 17684]]
[GRAPHIC] [TIFF OMITTED] TR24MR23.000
(i) For airplanes that have accumulated less than 1,800 flight
hours since the last operational check of the ram air shutoff valve
was performed as specified in AMM Task 21-52-04-710-801-A01, and for
airplanes that have accumulated less than 1,800 flight hours from
the date of issuance of the original airworthiness certificate or
original export certificate of airworthiness: Within 90 days after
the effective date of this AD, or before accumulating 1,800 total
flight hours, whichever occurs later.
(ii) For airplanes that have accumulated 1,800 flight hours or
more since the last operational check of the ram air shutoff valve
was performed as specified in AMM Task 21-52-04-710-801-A01, and for
airplanes that have accumulated 1,800 flight hours or more since the
date of issuance of the original airworthiness certificate or
original export certificate of airworthiness and for which no
operational check of the valve has been performed: Within 90 days
after the effective date of this AD or before accumulating 3,000
total flight hours, whichever occurs later.
(2) Within 90 days after the effective date of this AD, revise
the existing maintenance or inspection program, as applicable, to
incorporate the information specified in figure 2 to the
introductory text of paragraph (g)(2) of this AD. The initial
compliance time for doing the task is at the applicable time
specified in paragraph (g)(2)(i) or (ii) of this AD.
Figure 2 to the introductory text of paragraph (g)(2)--AMM Task for
the Pack Discharge and Ram-Air Supply Ducts
[GRAPHIC] [TIFF OMITTED] TR24MR23.001
(i) For airplanes that have accumulated less than 17,600 flight
hours since the last detailed inspection of the pack discharge and
ram air supply ducts was performed as specified in AMM Task 21-51-
00-220-801-A01, and for airplanes that have accumulated less than
17,600 flight hours since the date of issuance of the original
airworthiness certificate or original export certificate of
airworthiness: Within 90 days after the effective date of this AD,
or before accumulating 17,600 total flight hours, whichever occurs
later.
(ii) For airplanes that have accumulated 17,600 flight hours or
more since the last detailed inspection of the pack discharge and
ram air supply ducts as specified in AMM Task 21-51-00-220-801-A01,
and for airplanes that have accumulated 17,600 flight hours or more
since the date of issuance of the original airworthiness certificate
or original export certificate of airworthiness, and for which no
detailed inspection of the pack discharge and ram air supply ducts
has been performed: Within 90 days after the effective date of this
AD.
(h) No Alternative Actions or Intervals
After the existing maintenance or inspection program has been
revised as required by paragraph (g) of this AD, no alternative
actions (e.g., inspections) or intervals, may be used unless the
actions and intervals are approved as an alternative method of
compliance (AMOC) in accordance with the procedures specified in
paragraph (i)(1) of this AD.
(i) Other FAA AD Provisions
The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, New
York ACO Branch, FAA, has the authority to approve AMOCs for this
AD, if requested using the
[[Page 17685]]
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 Civil Aviation (TCCA); or MHI RJ
Aviation ULC's TCCA Design Approval Organization (DAO). If approved
by the DAO, the approval must include the DAO-authorized signature.
(j) Additional Information
(1) Refer to Transport Canada AD CF-2021-38R1, dated May 25,
2022, for related information. This Transport Canada AD may be found
in the AD docket at regulations.gov under Docket No. FAA-2022-0679.
(2) For more information about this AD, contact Chirayu A.
Gupta, 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].
(k) Material Incorporated by Reference
None.
Issued on March 15, 2023.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2023-05705 Filed 3-23-23; 8:45 am]
BILLING CODE 4910-13-P
