Document ID: FAA-2023-0156-0001
Agency: faa
Document Type: Proposed Rule
Title: Airworthiness Directives: Airbus SAS Airplanes
Posted Date: 2023-02-03T05:00Z

[Federal Register Volume 88, Number 23 (Friday, February 3, 2023)]
[Proposed Rules]
[Pages 7370-7374]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-02105]

 ========================================================================
 Proposed Rules
                                                 Federal Register
 ________________________________________________________________________
 
 This section of the FEDERAL REGISTER contains notices to the public of 
 the proposed issuance of rules and regulations. The purpose of these 
 notices is to give interested persons an opportunity to participate in 
 the rule making prior to the adoption of the final rules.
 
 ========================================================================
 

  Federal Register / Vol. 88, No. 23 / Friday, February 3, 2023 / 
Proposed Rules  

[[Page 7370]]

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2023-0156; Project Identifier MCAI-2022-01511-T]
RIN 2120-AA64

Airworthiness Directives; Airbus SAS Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD) 
2022-19-05, which applies to all Airbus SAS Model A330-841 and -941 
airplanes. AD 2022-19-05 requires maintenance actions, including a high 
pressure valve (HPV) seal integrity test, repetitive replacement of the 
HPV clips, revision of the existing airplane flight manual (AFM), and 
implementation of updates to the FAA-approved operator's minimum 
equipment list (MEL). Since the FAA issued AD 2022-19-05, additional 
instructions and maintenance procedures have been developed to address 
failures of the HPV. This proposed AD continues to require certain 
actions in AD 2022-19-05 and would provide additional criteria for the 
installation of HPV and HPV clips, as specified in a European Union 
Aviation Safety Agency (EASA) AD, which is proposed for incorporated by 
reference (IBR). The FAA is proposing this AD to address the unsafe 
condition on these products.

DATES: The FAA must receive comments on this proposed AD by March 20, 
2023.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to regulations.gov. Follow 
the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    AD Docket: You may examine the AD docket at regulations.gov under 
Docket No. FAA-2023-0156; 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 NPRM, the mandatory continuing airworthiness 
information (MCAI), any comments received, and other information. The 
street address for Docket Operations is listed above.
    Material Incorporated by Reference:
     For the EASA AD identified in this NPRM, you may contact 
EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 
8999 000; email [email protected]. You may find this material on the 
EASA website at ad.easa.europa.eu.
     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.

FOR FURTHER INFORMATION CONTACT: Vladimir Ulyanov, Aerospace Engineer, 
Large Aircraft Section, FAA, International Validation Branch, 2200 
South 216th St., Des Moines, WA 98198; telephone 206-231-3229; email 
[email protected].

SUPPLEMENTARY INFORMATION: 

Comments Invited

    The FAA invites you to send any written relevant data, views, or 
arguments about this proposal. Send your comments to an address listed 
under ADDRESSES. Include ``Docket No. FAA-2023-0156; Project Identifier 
MCAI-2022-01511-T'' at the beginning of your comments. The most helpful 
comments reference a specific portion of the proposal, explain the 
reason for any recommended change, and include supporting data. The FAA 
will consider all comments received by the closing date and may amend 
this proposal because of those comments.
    Except for Confidential Business Information (CBI) as described in 
the following paragraph, and other information as described in 14 CFR 
11.35, the FAA will post all comments received, without change, to 
regulations.gov, including any personal information you provide. The 
agency will also post a report summarizing each substantive verbal 
contact received about this NPRM.

Confidential Business Information

    CBI is commercial or financial information that is both customarily 
and actually treated as private by its owner. Under the Freedom of 
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public 
disclosure. If your comments responsive to this NPRM contain commercial 
or financial information that is customarily treated as private, that 
you actually treat as private, and that is relevant or responsive to 
this NPRM, it is important that you clearly designate the submitted 
comments as CBI. Please mark each page of your submission containing 
CBI as ``PROPIN.'' The FAA will treat such marked submissions as 
confidential under the FOIA, and they will not be placed in the public 
docket of this NPRM. Submissions containing CBI should be sent to 
Vladimir Ulyanov, Aerospace Engineer, Large Aircraft Section, FAA, 
International Validation Branch, 2200 South 216th St., Des Moines, WA 
98198; telephone 206-231-3229; email [email protected]. Any 
commentary that the FAA receives which is not specifically designated 
as CBI will be placed in the public docket for this rulemaking.

Background

    On August 18, 2022, the FAA issued Emergency AD 2022-18-51 for all 
Airbus SAS Model A330-841 and -941 airplanes. Emergency AD 2022-18-51 
corresponded to EASA Emergency AD 2022-0170-E, dated August 17, 2022 
(EASA Emergency AD 2022-0170-E). EASA is the Technical Agent for the 
Member States of the European Union. Emergency AD 2022-18-51 required 
revising the existing AFM to incorporate additional limitations 
prohibiting takeoff for certain airplane configurations; specified 
airplane dispatch restrictions using certain provisions of the A330 
MMEL or amending the existing FAA-approved operator's MEL; and required 
obtaining and accomplishing instructions

[[Page 7371]]

following certain maintenance messages. The FAA issued Emergency AD 
2022-18-51 to address a leaking HPV, which may expose the pressure 
regulating valve (PRV), which is installed downstream from the HPV, to 
high pressure, possibly damaging the PRV itself and preventing its 
closure. The unsafe condition, if not addressed, could result in high 
pressure and temperatures in the duct downstream from the PRV, with 
possible duct burst, damage to several systems, and consequent loss of 
control of the airplane.
    Since the FAA issued Emergency AD 2022-18-51, EASA superseded its 
Emergency AD 2022-0170-E and issued EASA AD 2022-0181, dated August 29, 
2022 (EASA AD 2022-0181), to correct an unsafe condition for all Airbus 
SAS A330-841 and -941 airplanes. The FAA issued AD 2022-19-05, 
Amendment 39-22174 (87 FR 54870, September 8, 2022) (AD 2022-19-05), 
for all Airbus SAS Model A330-841 and -941 airplanes. AD 2022-19-05 was 
prompted by EASA AD 2022-0181, which was intended to address leaking 
bleed system HPVs, likely due to HPV clip failure and sealing ring 
damage.
    AD 2022-19-05 requires revising the existing AFM to incorporate 
additional limitations prohibiting takeoff for certain airplane 
configurations; specifies airplane dispatch restrictions using certain 
provisions of the A330 MMEL (master minimum equipment list) or amending 
the existing FAA-approved operator's MEL; requires obtaining and 
accomplishing instructions following certain maintenance messages; 
revising the Limitations section of the AFM; updating the A330 MMEL 
with new provisions and procedures; a seal integrity test of each HPV; 
and a detailed inspection of the wing bellows. The FAA issued AD 2022-
19-05 to address the identified unsafe condition.

Actions Since AD 2022-19-05 Was Issued

    Since the FAA issued AD 2022-19-05, EASA superseded EASA AD 2022-
0181, and issued EASA AD 2022-0227, dated November 24, 2022 (EASA AD 
2022-0227), to correct an unsafe condition for all Airbus SAS Model 
A330-841 and -941 airplanes. EASA AD 2022-0227 states that Airbus has 
since published improved instructions and maintenance procedures to 
address failures of the HPV and incorporate comments received.
    FAA AD 2022-19-05 explained that the requirements were ``interim 
action,'' and further rulemaking was being considered. The FAA has now 
determined that further rulemaking is indeed necessary, and this 
proposed AD follows from that determination.
    The FAA is issuing this AD to address a leaking HPV, which may 
expose the PRV, which is installed downstream from the HPV, to high 
pressure, possibly damaging the PRV itself and preventing its closure. 
You may examine the MCAI in the AD docket at regulations.gov under 
Docket No. FAA-2023-0156.

Explanation of Retained Requirements

    Although this proposed AD does not explicitly restate the 
requirements of AD 2022-19-05, this proposed AD would retain certain 
requirements of AD 2022-19-05. Those requirements are referenced in 
EASA AD 2022-0227, which, in turn, is referenced in paragraph (g) of 
this proposed AD.

Related Service Information Under 1 CFR Part 51

    EASA AD 2022-0227 specifies procedures for the following actions:
     Revision of the Limitations section of the existing AFM 
and removal of the previously required limitations.
     Implementation of the instructions of the MMEL update on 
the basis of which the operator's MEL must be amended with new 
provisions and procedures for the following items: Air Conditioning 
Pack, Engine Bleed Air Supply System, Engine Bleed IP (Intermediate 
Pressure) Check Valve, and Engine Bleed HP Valve and cancel the 
dispatch restrictions.
     A seal integrity test of each HPV, and corrective actions 
(including replacement of the HPV, and a detailed inspection of the 
wing bellow on engine 1(2) and replacement of any damaged or deformed 
wing bellow).
    EASA AD 2022-0227 also describes the following maintenance 
instructions, among other actions, to be accomplished following certain 
faults or failures:
     HPV troubleshooting procedure and additional maintenance 
actions after any Class 1 maintenance message associated to an HPV 
fault, and corrective actions (including replacement of the HPV or wing 
bellow).
     HPV seal integrity test and the additional maintenance 
actions after any Class 1 or Class 2 maintenance message associated to 
a PRV fault, and corrective actions (including replacement of the HPV 
and PRV, and a detailed inspection of the wing bellow on engine 1(2) 
and replacement of any damaged or deformed wing bellow).
     A visual (borescope) inspection of the engine bleed air 
system (EBAS) to detect signs of foreign object debris (FOD), including 
metallic debris in the butterfly valve and dents or damage of the flaps 
of the intermediate pressure check valve (IPCV), and dents and missing 
segments in the PRV, the header of the high pressure/intermediate 
pressure (HP/IP) duct, the y-duct, and the pylon ducts after any 
failure of an HPV clip and/or any of the HPV butterfly sealing rings, 
and corrective actions (including removing FOD and replacing the IPCV 
or PRV).
     A seal integrity test of each HPV after any take-off or 
go-around accomplished with ``packs OFF'' or ``APU bleed ON'' or 
``engine bleed OFF,'' and corrective actions (including replacement of 
the HPV, and a detailed inspection of the wing bellow on engine 1(2) 
and replacement of any damaged or deformed wing bellow).
     Additional actions to be performed for any Class 1 
maintenance message associated with an HPV fault.
     Initial and repetitive replacement of each HPV clip with a 
new HPV clip.
    EASA AD 2022-0227 also specifies that HPV clips may be installed 
provided they are new and serviceable, and replaced before exceeding 
4,000 hours time-in-service.
    This material 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.

FAA's Determination

    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 the State of Design Authority, it 
has notified the FAA of the unsafe condition described in the MCAI 
referenced above. The FAA is issuing this NPRM after determining that 
the unsafe condition described previously is likely to exist or develop 
in other products of the same type design.

Proposed AD Requirements in This NPRM

    This proposed AD would retain certain requirements of AD 2022-19-
05. This proposed AD would require accomplishing the actions specified 
in EASA AD 2022-0227 described previously, except for any differences 
identified as exceptions in the regulatory text of this proposed AD and 
except as discussed under ``Differences Between this Proposed AD and 
the MCAI.''

Difference Between This Proposed AD and the MCAI

    Although EASA AD 2022-0227 requires reporting any detected 
failures,

[[Page 7372]]

this proposed AD would not require any reports. Collecting this 
additional information will not add to the determination of the unsafe 
condition or corrective actions.

Compliance With AFM and MEL Revisions

    EASA AD 2022-0227 requires operators to ``inform all flight crews'' 
of revisions to the existing AFM and MEL, and thereafter to ``operate 
the aeroplane accordingly.'' However, this AD does not specifically 
require those actions, as those actions are already required by FAA 
regulations.
    FAA regulations require operators to furnish to pilots any changes 
to the AFM (for example, 14 CFR 121.137), and to ensure the pilots are 
familiar with the AFM (for example, 14 CFR 91.505). As with any other 
flightcrew training requirement, training on the updated AFM content is 
tracked by the operators and recorded in each pilot's training record, 
which is available for the FAA to review. FAA regulations also require 
pilots to follow the procedures in the AFM including all updates. 14 
CFR 91.9 requires that any person operating a civil aircraft must 
comply with the operating limitations specified in the AFM.
    FAA regulations (14 CFR 121.628(a)(2)) require operators to provide 
pilots with access to all of the information contained in the 
operator's MEL. Furthermore, 14 CFR 121.628(a)(5) requires airplanes to 
be operated under all applicable conditions and limitations contained 
in the operator's MEL.
    Therefore, including a requirement in this proposed AD to operate 
the airplane according to the revised AFM and MEL would be redundant 
and unnecessary.

Explanation of Required Compliance Information

    In the FAA's ongoing efforts to improve the efficiency of the AD 
process, the FAA developed a process to use some civil aviation 
authority (CAA) ADs as the primary source of information for compliance 
with requirements for corresponding FAA ADs. The FAA has been 
coordinating this process with manufacturers and CAAs. As a result, the 
FAA proposes to incorporate EASA AD 2022-0227 by reference in the FAA 
final rule. This proposed AD would, therefore, require compliance with 
EASA AD 2022-0227 in its entirety through that incorporation, except 
for any differences identified as exceptions in the regulatory text of 
this proposed AD. Using common terms that are the same as the heading 
of a particular section in EASA AD 2022-0227 does not mean that 
operators need comply only with that section. For example, where the AD 
requirement refers to ``all required actions and compliance times,'' 
compliance with this AD requirement is not limited to the section 
titled ``Required Action(s) and Compliance Time(s)'' in EASA AD 2022-
0227. Service information required by EASA AD 2022-0227 for compliance 
will be available at regulations.gov under Docket No. FAA-2023-0156 
after the FAA final rule is published.

Interim Action

    The FAA considers that this proposed AD would be an interim action. 
The FAA anticipates that further AD action will follow.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would 
affect 19 airplanes of U.S. registry. The new requirements of this AD 
add no additional economic burden. The current costs for this AD are 
repeated for the convenience of affected operators, as follows:

                                      Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
----------------------------------------------------------------------------------------------------------------
AFM revision..........................  1 work-hour x $85 per                 $0             $85          $1,615
                                         hour = $85.
MEL update............................  1 work-hour x 85 per                   0              85           1,615
                                         hour = 85.
HPV Seal Integrity Test...............  1 work-hour x 85 per                   0              85           1,615
                                         hour = 85.
HPV clip replacement (both engines)...  11 work-hours x 85 per                28             963          18,297
                                         hour = 935.
----------------------------------------------------------------------------------------------------------------

    The FAA estimates the following costs to do any necessary on-
condition actions 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 these on-condition actions:

                                     Estimated Costs of On-Condition Actions
----------------------------------------------------------------------------------------------------------------
                                                                                                     Cost per
                    Action                                 Labor cost               Parts cost        product
----------------------------------------------------------------------------------------------------------------
HPV replacement (each)........................  4 work-hours x $85 per hour =             $6,459          $6,799
                                                 $340.
Wing bellow replacement (each wing)...........  6 work-hours x 85 per hour = 510             663           1,173
PRV replacement (both engines)................  9 work-hours x 85 per hour = 765         107,620         108,385
----------------------------------------------------------------------------------------------------------------

    The FAA has received no definitive data on which to base the cost 
estimates for the maintenance actions or additional actions specified 
in this proposed AD.

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.

[[Page 7373]]

Regulatory Findings

    The FAA determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would 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 this proposed 
regulation:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Would not affect intrastate aviation in Alaska, and
    (3) Would 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 Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 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:
0
a. Removing Airworthiness Directive (AD) 2022-19-05, Amendment 39-22174 
(87 FR 54870, dated September 8, 2022); and
0
b. Adding the following new AD:

Airbus SAS: Docket No. FAA-2023-0156; Project Identifier MCAI-2022-
01511-T.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by March 20, 2023.

(b) Affected ADs

    This AD replaces AD 2022-19-05, Amendment 39-22174 (87 FR 54870, 
September 8, 2022) (AD 2022-19-05).

(c) Applicability

    This AD applies to all Airbus SAS Model A330-841 and -941 
airplanes, certificated in any category.

(d) Subject

    Air Transport Association (ATA) of America Code: 36, Pneumatic; 
75, Air.

(e) Unsafe Condition

    This AD was prompted by reports of leaking bleed system high 
pressure valves (HPVs), likely due to HPV clip failure and sealing 
ring damage, and by the development of additional instructions and 
maintenance procedures to address HPV failures. The FAA is issuing 
this AD to address a leaking HPV, which may expose the pressure 
regulating valve (PRV), which is installed downstream from the HPV, 
to high pressure, possibly damaging the PRV itself and preventing 
its closure. The unsafe condition, if not addressed, could result in 
high pressure and temperatures in the duct downstream from the PRV, 
with possible duct burst, damage to several systems, and consequent 
loss of control of the airplane.

(f) Compliance

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

(g) Requirements

    Except as specified in paragraph (h) of this AD: Comply with all 
required actions and compliance times specified in, and in 
accordance with, European Union Aviation Safety Agency (EASA) AD 
2022-0227, dated November 24, 2022 (EASA AD 2022-0227).

(h) Exceptions to EASA AD 2022-0227

    (1) Where EASA AD 2022-0227 refers to ``05 September 2022 [the 
effective date of EASA AD 2022-0181],'' this AD requires using 
September 15, 2022 (the effective date of AD 2022-19-05).
    (2) Where EASA AD 2022-0227 refers to its effective date, this 
AD requires using the effective date of this AD.
    (3) Where paragraphs (1) and (4) of EASA AD 2022-0227 specify to 
inform all flightcrews of airplane flight manual (AFM) revisions and 
dispatch limitations, and thereafter to operate the airplane 
accordingly, this AD does not require those actions, as those 
actions are already required by existing FAA regulations (see 14 CFR 
91.9, 91.505, and 121.137).
    (4) This AD does not adopt the reporting requirements of 
paragraph (17) of EASA AD 2022-0227.
    (5) This AD does not adopt the ``Remarks'' section of EASA AD 
2022-0227.

(i) Additional AD Provisions

    The following provisions also apply to this AD:
    (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 International 
Validation Branch, send it to the attention of the person identified 
in paragraph (j) of this AD. Information may be emailed to: [email protected].
    (i) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the responsible Flight Standards Office.
    (ii) AMOCs approved previously for AD 2022-19-05 are approved as 
AMOCs for the corresponding provisions of EASA AD 2022-0227 that are 
required by paragraph (g) of this AD.
    (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 EASA; or Airbus SAS's EASA Design 
Organization Approval (DOA). If approved by the DOA, the approval 
must include the DOA-authorized signature.
    (3) Required for Compliance (RC): Except as required by 
paragraph(s) (i)(2) of this AD, if any service information contains 
procedures or tests that are identified as RC, those procedures and 
tests must be done to comply with this AD; any procedures or tests 
that are not identified as RC are recommended. Those procedures and 
tests that are not identified as RC may be deviated from using 
accepted methods in accordance with the operator's maintenance or 
inspection program without obtaining approval of an AMOC, provided 
the procedures and tests identified as RC can be done and the 
airplane can be put back in an airworthy condition. Any 
substitutions or changes to procedures or tests identified as RC 
require approval of an AMOC.

(j) Additional Information

    For more information about this AD, contact Vladimir Ulyanov, 
Aerospace Engineer, Large Aircraft Section, FAA, International 
Validation Branch, 2200 South 216th St., Des Moines, WA 98198; 
telephone 206-231-3229; email [email protected].

(k) 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) European Union Aviation Safety Agency (EASA) AD 2022-0227, 
dated November 24, 2022.
    (ii) [Reserved]
    (3) For EASA AD 2022-0227, contact EASA, Konrad-Adenauer-Ufer 3, 
50668 Cologne, Germany; telephone +49 221 8999 000; email 
[email protected]. You may find this EASA AD on the EASA website at 
ad.easa.europa.eu.
    (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 7374]]

    Issued on January 27, 2023.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2023-02105 Filed 2-2-23; 8:45 am]
BILLING CODE 4910-13-P