Document ID: FAA-2023-1639-0007
Agency: faa
Document Type: Rule
Title: Airworthiness Directives: MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
Posted Date: 2023-12-14T05:00Z

[Federal Register Volume 88, Number 239 (Thursday, December 14, 2023)]
[Rules and Regulations]
[Pages 86574-86578]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-27427]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2023-1639; Project Identifier MCAI-2023-00109-T; 
Amendment 39-22604; AD 2023-23-02]
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.

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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all 
MHI RJ Aviation ULC Model CL-600-2B19 (Regional Jet Series 100 & 440), 
CL-600-2C10 (Regional Jet Series 700, 701 & 702), CL-600-2C11 (Regional 
Jet Series 550), CL-600-2D15 (Regional Jet Series 705), CL-600-2D24 
(Regional Jet Series 900), and CL-600-2E25 (Regional Jet Series 1000) 
airplanes. This AD was prompted by reports of power control unit (PCU) 
rod end fractures due to pitting corrosion, and a determination that 
new or more restrictive airworthiness limitations are necessary. This 
AD requires, for certain airplanes, revising the existing maintenance 
or inspection program, as applicable, to incorporate new or more 
restrictive airworthiness limitations. This AD also requires 
accomplishing certain aircraft maintenance manual (AMM) tasks and 
corrective actions following short-term or long-term storage. The FAA 
is issuing this AD to address the unsafe condition on these products.

DATES: This AD is effective January 18, 2024.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of January 18, 
2024.

ADDRESSES: 
    AD Docket: You may examine the AD docket at regulations.gov under 
Docket No. FAA-2023-1639; 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:

[[Page 86575]]

     For service information identified in this final rule, 
contact MHI RJ Aviation Group, Customer Response Center, 3655 Ave. des 
Grandes-Tourelles, Suite 110, Boisbriand, Qu[eacute]bec J7H 0E2 Canada; 
North America toll-free telephone 833-990-7272 or direct-dial telephone 
450-990-7272; fax 514-855-8501; email mhirj.com">thd.crj@mhirj.com; website 
mhirj.com.
     You may view this service information at the FAA, 
Airworthiness Products Section, Operational Safety Branch, 2200 South 
216th St., Des Moines, WA. For information on the availability of this 
material at the FAA, call 206-231-3195. It is also available at 
regulations.gov under Docket No. FAA-2023-1639.

FOR FURTHER INFORMATION CONTACT: Gabriel Kim, Aviation Safety Engineer, 
FAA, 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-600-2B19 (Regional Jet Series 100 & 440), CL-600-2C10 
(Regional Jet Series 700, 701 & 702), CL-600-2C11 (Regional Jet Series 
550), CL-600-2D15 (Regional Jet Series 705), CL-600-2D24 (Regional Jet 
Series 900), and CL-600-2E25 (Regional Jet Series 1000) airplanes. The 
NPRM published in the Federal Register on July 28, 2023 (88 FR 48767). 
The NPRM was prompted by AD CF-2023-03, dated January 20, 2023, issued 
by Transport Canada, which is the aviation authority for Canada 
(referred to after this as the MCAI). The MCAI states that in-service 
reports of PCU rod end fractures due to pitting corrosion led to the 
issuance of Transport Canada AD CF-2018-29, dated November 2, 2018 
(which corresponds to FAA AD 2019-19-08, Amendment 39-19744 (84 FR 
60902, November 12, 2019) (AD 2019-19-08). AD 2019-19-08 requires 
detailed inspections of the elevator PCU rod ends and applicable 
corrective actions, and prohibits using certain aircraft maintenance 
manual tasks. Pitting corrosion can cause the PCU end rod spherical 
bearing to seize, potentially inducing a bending moment on the PCU 
output rod. The bending moment will eventually fracture the rod end. 
This condition, if not corrected, could lead to a disconnect between 
the PCU and the elevator or rudder control surface, resulting in 
potential loss of the control surface function or inadequate flutter 
suppression. Since Transport Canada AD CF-2018-29 was issued, MHI RJ 
conducted further safety analyses and determined that new or more 
restrictive airworthiness limitations are necessary for the operational 
check of each individual rudder PCU and elevator PCU. Additionally, 
Transport Canada determined that certain return-to-service AMM tasks 
are needed following short-term or long-term airplane storage.
    In the NPRM, the FAA proposed to require, for certain airplanes, 
revising the existing maintenance or inspection program, as applicable, 
to incorporate new or more restrictive airworthiness limitations. The 
NPRM also proposed to require accomplishing certain aircraft 
maintenance manual (AMM) tasks and corrective actions following short-
term or long-term storage. The FAA is issuing this AD to address 
fractured PCU rod ends. This condition, if not addressed, could lead to 
a disconnect between the PCU and the elevator or rudder control 
surface, resulting in potential loss of the control surface function or 
inadequate flutter suppression.
    You may examine the MCAI in the AD docket at regulations.gov under 
Docket No. FAA-2023-1639.

Discussion of Final Airworthiness Directive

Comments

    The FAA received a comment from Air Line Pilots Association, 
International, who supported the NPRM without change.
    The FAA received additional comments from two commenters, including 
Air Wisconsin Airlines and MHI RJ Aviation ULC. The following presents 
the comments received on the NPRM and the FAA's response to each 
comment.

Request To Match MCAI Language

    Air Wisconsin Airlines requested that the phrase ``or later 
revisions of these tasks,'' as found in the Canadian AD, be added to 
any AMM revisions in the NPRM. Air Wisconsin stated that this phrase 
could help avoid the need for an AMOC at every AMM revision.
    The FAA does not agree to the requested change. Specifying in an AD 
the use of ``later revisions'' of required service information, which 
do not exist at the time a final rule is published, violates the 
policies of the Office of the Federal Register (OFR) for material that 
is incorporated by reference. This AD has not been changed regarding 
this request.

Request To Correct Error in Required Actions

    MHI RJ requested that the reference to MRM TR ALI-0759 be deleted 
from paragraph (i)(1) of the proposed AD, ``Required Actions for Model 
CL-600-2E25 Airplanes,'' because that TR is not applicable to those 
airplanes. The commenter noted that this would agree with the MCAI.
    The FAA agrees to the requested change. The reference to TR ALI-
0759 has been deleted from paragraph (i)(1) of this AD.

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

    The FAA reviewed MHI RJ Temporary Revisions ALI-0757 and ALI-0759, 
both dated September 24, 2021. This service information specifies new 
or more restrictive airworthiness limitations for the elevator and 
rudder PCUs.
    The FAA also reviewed the following service information. This 
service information specifies, among other tasks, operational tests of 
the rudder control and elevator control systems, and detailed 
inspections of the rudder PCU rod end spherical ball and elevator PCU 
rod end spherical ball, and corrective actions. Corrective actions 
include making sure that the applicable parts are moving or rotating 
correctly. These documents are distinct since they apply to different 
airplane models in different configurations.
     Task 27-21-00-710-805, Operational Test of the Rudder 
Control System, Subject 27-21-00, Rudder Control System, Chapter 27, 
Flight Controls, of MHI RJ CRJ200 Aircraft Maintenance Manual, CSP A-
001, Revision 66, dated October 10, 2022.
     Task 27-23-01-220-801, Detailed Inspection of the Rudder 
PCU Rod End Spherical Ball, Subject 27-23-01, Power

[[Page 86576]]

Control Unit (PCU), Rudder, Chapter 27, Flight Controls, of MHI RJ 
CRJ200 Aircraft Maintenance Manual, CSP A-001, Revision 66, dated 
October 10, 2022.
     Task 27-31-00-710-803, Operational Test of the Elevator 
Control System, Subject 27-31-00, Elevator Control System, Chapter 27, 
Flight Controls, of MHI RJ CRJ200 Aircraft Maintenance Manual, CSP A-
001, Revision 66, dated October 10, 2022.
     Task 27-33-01-220-801, Detailed Inspection of the Elevator 
PCU Rod End Spherical Ball, Subject 27-33-01, Power Control Unit (PCU), 
Elevator, Chapter 27, Flight Controls, of MHI RJ CRJ200 Aircraft 
Maintenance Manual, CSP A-001, Revision 66, dated October 10, 2022.
     Task 27-23-01-220-802, Detailed Inspection of the Rudder 
PCU Rod End Spherical Ball, Subject 27-23-01, Power Control Unit (PCU), 
Rudder, Chapter 27, Flight Controls, of MHI RJ CRJ700/900/1000 Aircraft 
Maintenance Manual, Part 2, CSP B-001, Revision 71, dated December 16, 
2022.
     Task 27-23-01-710-801, Operational Test of the Rudder PCU, 
Subject 27-23-01, Power Control Unit (PCU), Rudder, Chapter 27, Flight 
Controls, of MHI RJ CRJ700/900/1000 Aircraft Maintenance Manual, Part 
2, CSP B-001, Revision 71, dated December 16, 2022.
     Task 27-33-01-220-801, Detailed Inspection of the Elevator 
PCU Rod End Spherical Ball, Subject 27-33-01, Power Control Unit (PCU), 
Elevator, Chapter 27, Flight Controls, of MHI RJ CRJ700/900/1000 
Aircraft Maintenance Manual, Part 2, CSP B-001, Revision 71, dated 
December 16, 2022.
     Task 27-33-01-710-802, Operational Test of the Elevator 
Power-Control Units (PCUs), Subject 27-33-01, Power Control Unit (PCU), 
Elevator, Chapter 27, Flight Controls, of MHI RJ CRJ700/900/1000 
Aircraft Maintenance Manual, Part 2, CSP B-001, Revision 71, dated 
December 16, 2022.
    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 1,125 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 8 work-hours x $85 per hour = $680              $0  Up to $680................  Up to $765,000.
----------------------------------------------------------------------------------------------------------------

    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:

2023-23-02 MHI RJ Aviation ULC (Type Certificate Previously Held by 
Bombardier, Inc.): Amendment 39-22604; Docket No. FAA-2023-1639; 
Project Identifier MCAI-2023-00109-T.

(a) Effective Date

    This airworthiness directive (AD) is effective January 18, 2024.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to all MHI RJ Aviation ULC (Type Certificate 
previously held by Bombardier, Inc.) airplanes identified in 
paragraphs (c)(1) through (6) of this AD, certificated in any 
category.
    (1) Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes.
    (2) Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) 
airplanes.
    (3) Model CL-600-2C11 (Regional Jet Series 550) airplanes.
    (4) Model CL-600-2D15 (Regional Jet Series 705) airplanes.
    (5) Model CL-600-2D24 (Regional Jet Series 900) airplanes.
    (6) Model CL-600-2E25 (Regional Jet Series 1000) airplanes.

[[Page 86577]]

(d) Subject

    Air Transport Association (ATA) of America Code 27, Flight 
controls.

(e) Reason

    This AD was prompted by reports of power control unit (PCU) rod 
end fractures due to pitting corrosion and a determination that new 
or more restrictive airworthiness limitations are necessary. The FAA 
is issuing this AD to address fractured PCU rod ends. This 
condition, if not addressed, could lead to a disconnect between the 
PCU and the elevator or rudder control surface, resulting in 
potential loss of the control surface function or inadequate flutter 
suppression.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Required Actions for Model CL-600-2B19 Airplanes

    For Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes: 
Within 60 days after the effective date of this AD, when returning 
an airplane from long-term storage (storage lasting more than 28 
days), do the actions specified in paragraphs (g)(1) through (4) of 
this AD. Do all applicable corrective actions before further flight.
    (1) Accomplish an operational test and applicable corrective 
actions, in accordance with Task 27-21-00-710-805, Operational Test 
of the Rudder Control System, Subject 27-21-00, Rudder Control 
System, Chapter 27, Flight Controls, of MHI RJ CRJ200 Aircraft 
Maintenance Manual, CSP A-001, Revision 66, dated October 10, 2022.
    (2) Accomplish an operational test and applicable corrective 
actions, in accordance with Task 27-31-00-710-803, Operational Test 
of the Elevator Control System, Subject 27-31-00, Elevator Control 
System, Chapter 27, Flight Controls, of MHI RJ CRJ200 Aircraft 
Maintenance Manual, CSP A-001, Revision 66, dated October 10, 2022.
    (3) Accomplish a detailed inspection and applicable corrective 
actions, in accordance with Task 27-23-01-220-801, Detailed 
Inspection of the Rudder PCU Rod End Spherical Ball, Subject 27-23-
01, Power Control Unit (PCU), Rudder, Chapter 27, Flight Controls, 
of MHI RJ CRJ200 Aircraft Maintenance Manual, CSP A-001, Revision 
66, dated October 10, 2022.
    (4) Accomplish a detailed inspection and applicable corrective 
actions in accordance with Task 27-33-01-220-801, Detailed 
Inspection of the Elevator PCU Rod End Spherical Ball, Subject 27-
33-01, Power Control Unit (PCU), Elevator, Chapter 27, Flight 
Controls, of MHI RJ CRJ200 Aircraft Maintenance Manual, CSP A-001, 
Revision 66, dated October 10, 2022.

(h) Required Actions for Model CL-600-2C10, CL-600-2C11, CL-600-2D15 
and CL-600-2D24 Airplanes

    For Model CL-600-2C10 (Regional Jet Series 700, 701, & 702); CL-
600-2C11 (Regional Jet Series 550); CL-600-2D15 (Regional Jet Series 
705); and CL-600-2D24 (Regional Jet Series 900) airplanes: 
Accomplish the actions required by paragraphs (h)(1) through (3) of 
this AD, as applicable.
    (1) Within 60 days after the effective date of this AD, revise 
the existing maintenance or inspection program, as applicable, to 
incorporate the information specified in MHI RJ Temporary Revisions 
ALI-0757 and ALI-0759, both dated September 24, 2021. The initial 
compliance time for doing the tasks is within 400 flight hours or 6 
months, whichever occurs first after the effective date of this AD; 
or within 60 days after the effective date of this AD; whichever 
occurs latest.
    (2) Within 60 days after the effective date of this AD, when 
returning an airplane from short-term storage (storage lasting 28 
days or less), do the actions specified in paragraphs (h)(2)(i) and 
(ii) of this AD. Do all applicable corrective actions before further 
flight.
    (i) Accomplish an operational test and applicable corrective 
actions, in accordance with Task 27-23-01-710-801, Operational Test 
of the Rudder PCU, Subject 27-23-01, Power Control Unit (PCU), 
Rudder, Chapter 27, Flight Controls, of MHI RJ CRJ700/900/1000 
Aircraft Maintenance Manual, Part 2, CSP B-001, Revision 71, dated 
December 16, 2022.
    (ii) Accomplish an operational test and applicable corrective 
actions in accordance with Task 27-33-01-710-802, Operational Test 
of the Elevator Power-Control Units (PCUs), Subject 27-33-01, Power 
Control Unit (PCU), Elevator, Chapter 27, Flight Controls, of MHI RJ 
CRJ700/900/1000 Aircraft Maintenance Manual, Part 2, CSP B-001, 
Revision 71, dated December 16, 2022.
    (3) Within 60 days after the effective date of this AD, when 
returning an airplane from long-term storage (storage lasting more 
than 28 days), do the actions specified in paragraphs (h)(3)(i) 
through (iv) of this AD. Do all applicable corrective actions before 
further flight.
    (i) Accomplish an operational test and applicable corrective 
actions, in accordance with Task 27-23-01-710-801, Operational Test 
of the Rudder PCU, Subject 27-23-01, Power Control Unit (PCU), 
Rudder, Chapter 27, Flight Controls, of MHI RJ CRJ700/900/1000 
Aircraft Maintenance Manual, Part 2, CSP B-001, Revision 71, dated 
December 16, 2022.
    (ii) Accomplish an operational test and applicable corrective 
actions in accordance with Task 27-33-01-710-802, Operational Test 
of the Elevator Power-Control Units (PCUs), Subject 27-33-01, Power 
Control Unit (PCU), Elevator, Chapter 27, Flight Controls, of MHI RJ 
CRJ700/900/1000 Aircraft Maintenance Manual, Part 2, CSP B-001, 
Revision 71, dated December 16, 2022.
    (iii) Accomplish a detailed inspection and applicable corrective 
actions in accordance with Task 27-23-01-220-802, Detailed 
Inspection of the Rudder PCU Rod End Spherical Ball, Subject 27-23-
01, Power Control Unit (PCU), Rudder, Chapter 27, Flight Controls, 
of MHI RJ CRJ700/900/1000 Aircraft Maintenance Manual, Part 2, CSP 
B-001, Revision 71, dated December 16, 2022.
    (iv) Accomplish a detailed inspection and applicable corrective 
actions, in accordance with Task 27-33-01-220-801, Detailed 
Inspection of the Elevator PCU Rod End Spherical Ball, Subject 27-
33-01, Power Control Unit (PCU), Elevator, Chapter 27, Flight 
Controls, of MHI RJ CRJ700/900/1000 Aircraft Maintenance Manual, 
Part 2, CSP B-001, Revision 71, dated December 16, 2022.

(i) Required Actions for Model CL-600-2E25 Airplanes

    For Model CL-600-2E25 (Regional Jet Series 1000) airplanes: 
Accomplish the actions specified in paragraphs (i)(1) through (3) of 
this AD, as applicable.
    (1) Within 60 days after the effective date of this AD, revise 
the existing maintenance or inspection program, as applicable, to 
incorporate the information specified in MHI RJ Temporary Revision 
ALI-0757, dated September 24, 2021. The initial compliance time for 
doing the tasks is within 400 flight hours or 6 months, whichever 
occurs first after the effective date of this AD; or within 60 days 
after the effective date of this AD; whichever occurs latest.
    (2) Within 60 days after the effective date of this AD, when 
returning an airplane from short-term storage (storage lasting 28 
days or less): Accomplish an operational test and applicable 
corrective actions in accordance with Task 27-33-01-710-802, 
Operational Test of the Elevator Power-Control Units (PCUs), Subject 
27-33-01, Power Control Unit (PCU), Elevator, Chapter 27, Flight 
Controls, of MHI RJ CRJ700/900/1000 Aircraft Maintenance Manual, 
Part 2, CSP B-001, Revision 71, dated December 16, 2022. Do all 
applicable corrective actions before further flight.
    (3) Within 60 days after the effective date of this AD, when 
returning an airplane from long-term storage (storage lasting more 
than 28 days), do the actions specified in paragraphs (i)(3)(i) and 
(ii) of this AD. Do all applicable corrective actions before further 
flight.
    (i) Accomplish an operational test and applicable corrective 
actions, in accordance with Task 27-33-01-710-802, Operational Test 
of the Elevator Power-Control Units (PCUs), Subject 27-33-01, Power 
Control Unit (PCU), Elevator, Chapter 27, Flight Controls, of MHI RJ 
CRJ700/900/1000 Aircraft Maintenance Manual, Part 2, CSP B-001, 
Revision 71, dated December 16, 2022.
    (ii) Accomplish a detailed inspection and applicable corrective 
actions, in accordance with Task 27-33-01-220-801, Detailed 
Inspection of the Elevator PCU Rod End Spherical Ball, Subject 27-
33-01, Power Control Unit (PCU), Elevator, Chapter 27, Flight 
Controls, of MHI RJ CRJ700/900/1000 Aircraft Maintenance Manual, 
Part 2, CSP B-001, Revision 71, dated December 16, 2022.

(j) No Alternative Actions or Intervals

    After the existing maintenance or inspection program has been 
revised as required by paragraphs (h)(1) and (i)(1) 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 (k)(1) of this AD.

(k) Other FAA AD Provisions

    The following provisions also apply to this AD:

[[Page 86578]]

    (1) Alternative Methods of Compliance (AMOCs): The Manager, 
International Validation 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, 
International Validation Branch, mail it to the address identified 
in paragraph (k)(2) of this AD or email to: [email protected]. If mailing information, also submit information by 
email. 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, International 
Validation Branch, FAA; or Transport Canada; or MHI RJ Aviation 
ULC's Transport Canada Design Approval Organization (DAO). If 
approved by the DAO, the approval must include the DAO-authorized 
signature.

(l) Additional Information

    (1) Refer to Transport Canada AD CF-2023-03, dated January 20, 
2023, for related information. This Transport Canada AD may be found 
in the AD docket at regulations.gov under Docket No. FAA-2023-1639.
    (2) For more information about this AD, contact Gabriel Kim, 
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7300; email [email protected].

(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) MHI RJ Temporary Revision ALI-0757, dated September 24, 
2021.
    (ii) MHI RJ Temporary Revision ALI-0759, dated September 24, 
2021.
    (iii) Task 27-21-00-710-805, Operational Test of the Rudder 
Control System, Subject 27-21-00, Rudder Control System, Chapter 27, 
Flight Controls, of MHI RJ CRJ200 Aircraft Maintenance Manual, CSP 
A-001, Revision 66, dated October 10, 2022.
    (iv) Task 27-23-01-220-801, Detailed Inspection of the Rudder 
PCU Rod End Spherical Ball, Subject 27-23-01, Power Control Unit 
(PCU), Rudder, Chapter 27, Flight Controls, of MHI RJ CRJ200 
Aircraft Maintenance Manual, CSP A-001, Revision 66, dated October 
10, 2022.
    (v) Task 27-31-00-710-803, Operational Test of the Elevator 
Control System, Subject 27-31-00, Elevator Control System, Chapter 
27, Flight Controls, of MHI RJ CRJ200 Aircraft Maintenance Manual, 
CSP A-001, Revision 66, dated October 10, 2022.
    (vi) Task 27-33-01-220-801, Detailed Inspection of the Elevator 
PCU Rod End Spherical Ball, Subject 27-33-01, Power Control Unit 
(PCU), Elevator, Chapter 27, Flight Controls, of MHI RJ CRJ200 
Aircraft Maintenance Manual, CSP A-001, Revision 66, dated October 
10, 2022.
    (vii) Task 27-23-01-220-802, Detailed Inspection of the Rudder 
PCU Rod End Spherical Ball, Subject 27-23-01, Power Control Unit 
(PCU), Rudder, Chapter 27, Flight Controls, of MHI RJ CRJ700/900/
1000 Aircraft Maintenance Manual, Part 2, CSP B-001, Revision 71, 
dated December 16, 2022.
    (viii) Task 27-23-01-710-801, Operational Test of the Rudder 
PCU, Subject 27-23-01, Power Control Unit (PCU), Rudder, Chapter 27, 
Flight Controls, of MHI RJ CRJ700/900/1000 Aircraft Maintenance 
Manual, Part 2, CSP B-001, Revision 71, dated December 16, 2022.
    (ix) Task 27-33-01-220-801, Detailed Inspection of the Elevator 
PCU Rod End Spherical Ball, Subject 27-33-01, Power Control Unit 
(PCU), Elevator, Chapter 27, Flight Controls, of MHI RJ CRJ700/900/
1000 Aircraft Maintenance Manual, Part 2, CSP B-001, Revision 71, 
dated December 16, 2022.
    (x) Task 27-33-01-710-802, Operational Test of the Elevator 
Power-Control Units (PCUs), Subject 27-33-01, Power Control Unit 
(PCU), Elevator, Chapter 27, Flight Controls, of MHI RJ CRJ700/900/
1000 Aircraft Maintenance Manual, Part 2, CSP B-001, Revision 71, 
dated December 16, 2022.
    (3) For service information identified in this AD, contact MHI 
RJ Aviation Group, Customer Response Center, 3655 Ave. des Grandes-
Tourelles, Suite 110, Boisbriand, Qu[eacute]bec J7H 0E2 Canada; 
North America toll-free telephone 833-990-7272 or direct-dial 
telephone 450-990-7272; fax 514-855-8501; email mhirj.com">thd.crj@mhirj.com; 
website mhirj.com.
    (4) You may view this service information at the FAA, 
Airworthiness Products Section, Operational Safety Branch, 2200 
South 216th St., Des Moines, WA. For information on the availability 
of this material at the FAA, call 206-231-3195.
    (5) You may view this material at the National Archives and 
Records Administration (NARA). For information on the availability 
of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations, or email [email protected].

    Issued on December 5, 2023.
Ross Landes,
Deputy Director for Regulatory Operations, Compliance & Airworthiness 
Division, Aircraft Certification Service.
[FR Doc. 2023-27427 Filed 12-13-23; 8:45 am]
BILLING CODE 4910-13-P