Document ID: FAA-2023-0931-0001
Agency: faa
Document Type: Proposed Rule
Title: Airworthiness Directives: Airbus Helicopters
Posted Date: 2023-04-18T04:00Z

[Federal Register Volume 88, Number 74 (Tuesday, April 18, 2023)]
[Proposed Rules]
[Pages 23586-23589]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-08015]

[[Page 23586]]

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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2023-0931; Project Identifier MCAI-2022-00653-R]
RIN 2120-AA64

Airworthiness Directives; Airbus Helicopters

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD) 
2021-05-03, which applies to certain Airbus Helicopters Model EC225LP 
helicopters. AD 2021-05-03 requires various inspections of a certain 
part-numbered left-hand (LH) engine fuel supply (fuel supply) hose and 
depending on the inspection results, reinstalling or removing the fuel 
supply hose from service. AD 2021-05-03 also requires installing an 
improved part and prohibits installing an affected fuel supply hose on 
any helicopter unless it is installed by following certain procedures. 
Since the FAA issued AD 2021-05-03, there were reports of difficulties 
using an adjusting tool to install the improved fuel supply hose. This 
proposed AD would continue to require the actions of 2021-05-03 and 
expand the applicability, expand the parts installation limitations, 
and require using an improved adjusting tool and updated procedures. 
This proposed AD would also update certain compliance times and clarify 
certain requirements. 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 June 2, 
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-2023-0931; 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, any comments received, and other 
information. The street address for Docket Operations is listed above.
    Material Incorporated by Reference:
     For Airbus Helicopters service information identified in 
this NPRM, contact Airbus Helicopters, 2701 North Forum Drive, Grand 
Prairie, TX 75052; telephone (972) 641-0000 or (800) 232-0323; fax 
(972) 641-3775; or at airbus.com/helicopters/services/technical-support.html.
     You may view this service information at the FAA, Office 
of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 
6N-321, Fort Worth, TX 76177. For information on the availability of 
this material at the FAA, call (817) 222-5110.
    Other Related Service Information: Other Airbus Helicopters service 
information identified in this NPRM is available at the Airbus 
Helicopters contact information under Material Incorporated by 
Reference above. You may also view this service information at the FAA 
contact information under Material Incorporated by Reference above.

FOR FURTHER INFORMATION CONTACT: Hal Jensen, Aerospace Engineer, 
Operational Safety Branch, Compliance & Airworthiness Division, FAA, 
26805 E 68th Ave., Mail Stop: Room 214, Denver, CO 80249; telephone 
(303) 342-1080; 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-2023-0931; Project Identifier 
MCAI-2022-00653-R'' 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 Hal 
Jensen, Aerospace Engineer, Operational Safety Branch, Compliance & 
Airworthiness Division, FAA, 26805 E 68th Ave., Mail Stop: Room 214, 
Denver, CO 80249; telephone (303) 342-1080; 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

    The FAA issued AD 2021-05-03, Amendment 39-21864 (86 FR 72824, 
December 23, 2021) (AD 2021-05-03), for certain Airbus Helicopters 
Model EC225LP helicopters. AD 2021-05-03 requires visually inspecting a 
certain part-numbered LH fuel supply hose for twisting, and if needed, 
borescope inspecting the entire length of the inside of the fuel supply 
hose for twisting. Depending on the inspection results, AD 2021-05-03 
requires reinstalling or removing the fuel supply hose from service. 
Additionally, AD 2021-05-03 prohibits installing that part-numbered LH 
fuel supply hose on any helicopter unless that LH fuel supply hose is 
installed by following certain procedures described in the 
manufacturer's service bulletin. Finally, AD 2021-05-03 also requires 
modifying your helicopter by removing LH fuel supply hose part number 
(P/N) 704A34416087 from service and installing the improved LH fuel 
supply hose P/N 704A34416101.
    AD 2021-05-03 was prompted by EASA AD 2021-0156, dated July 2, 2021 
(EASA AD 2021-0156), which superseded EASA AD 2019-0092, dated April 
26, 2019 (EASA AD 2019-0092), issued by EASA, which is the Technical 
Agent for the Member States of the

[[Page 23587]]

European Union, to correct an unsafe condition for all Airbus 
Helicopters Model EC 225 LP helicopters. EASA initially advised of a 
report that an LH side engine experienced a power loss during an in-
flight single engine power check. EASA stated that a subsequent 
investigation determined that the fuel flow to the affected engine was 
restricted by a twisted fuel supply hose. EASA later advised that 
Airbus Helicopters had developed an improved fuel supply hose P/N 
704A34416101 and modification instructions to install the improved 
part. This condition, if not addressed, could lead to a decrease of the 
LH engine power when accelerating to the power setting corresponding to 
One Engine Inoperative power and subsequent reduced control of the 
helicopter.
    EASA AD 2021-0156 retained the requirements of EASA AD 2019-0092 
and required replacing the affected part with the improved part. EASA 
AD 2021-0156 also allowed a terminating action for the inspection 
requirements once the improved part had been installed according to the 
installation requirements.

Actions Since AD 2021-05-03 Was Issued

    Since the FAA issued AD 2021-05-03, EASA issued AD 2022-0087, dated 
May 16, 2022 (EASA AD 2022-0087) to supersede EASA AD 2021-0156. EASA 
advises of difficulties that were reported during installation of the 
improved LH fuel supply hose due to using an inappropriately shaped 
adjusting tool. Accordingly, EASA AD 2022-0087 retains the requirements 
of EASA AD 2021-0156 and requires replacing the affected part with the 
improved part by following updated modification instructions and using 
an improved adjusting tool. The updated modification instructions also 
specify updated torque values for the junction nuts and re-tightening 
instructions for helicopters modified with previous instructions. EASA 
AD 2022-0087 requires a repetitive inspection for fuel leakage for 
those helicopters modified with previous instructions and considers the 
re-tightening of the junction nuts of the improved part as terminating 
action for the repetitive inspection requirements.
    Accordingly, this proposed AD would expand the applicability of AD 
2021-05-03 by adding LH fuel supply hose P/N 704A34416101. The FAA also 
determined to update certain compliance times by adding calendar 
compliance times to factor in varying fleet usage and clarified the 
actions in paragraphs (g)(1)(i) and (ii) of AD 2021-05-03. This 
proposed AD also updates the parts installation limitations for LH fuel 
supply hose P/N 704A34416087 and adds parts installation limitations 
for LH fuel supply hose P/N 704A34416101. Lastly, this NPRM updates the 
Costs of Compliance section by correcting the number of work-hours to 
replace an LH fuel supply hose.

FAA's Determination

    These helicopters been approved by EASA and are approved for 
operation in the United States. Pursuant to the FAA's bilateral 
agreement with the European Union, EASA has notified the FAA about the 
unsafe condition described in its AD. The FAA is proposing this AD 
after evaluating all known relevant information and determining that 
the unsafe condition described previously is likely to exist or develop 
on other helicopters of the same type design.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed Airbus Helicopters Alert Service Bulletin (ASB) 
No. EC225-28A026, Revision 1, dated May 6, 2022 (ASB EC225-28A026 Rev 
1), which specifies procedures for modifying the adjusting tool and 
replacing the LH fuel supply hose by using the modified adjusting tool. 
ASB EC225-28A026 Rev 1 also specifies updated allowable torque limits 
for the junction nuts and, for helicopters that have previously 
accomplished Airbus Helicopters ASB No. EC225-28A026, Revision 0, dated 
May 21, 2021, ASB EC225-28A026 Rev 1 specifies procedures to 
repetitively inspect the junction nuts for fuel leakage until the LH 
engine is removed and the updated allowable torque limit is applied to 
the junction nuts.
    This proposed AD would also require Airbus Helicopters ASB No. 
EC225-71A019, Revision 2, dated May 21, 2021, which the Director of the 
Federal Register approved for incorporation by reference as of January 
27, 2022 (86 FR 72824, December 23, 2021).
    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.

Other Related Service Information

    The FAA also reviewed Airbus Helicopters ASB No. EC225-71A019, 
Revision 1, dated February 28, 2019. This service information specifies 
procedures for removing the fuel supply hose from the LH power plant, 
visually inspecting the fuel supply hose for twisting, and depending on 
inspection results, performing an endoscope inspection on the inside of 
the hose.

Proposed AD Requirements in This NPRM

    For helicopters with LH fuel supply hose P/N 704A34416087 
installed, this proposed AD would require visually inspecting the LH 
fuel supply hose for twisting, and if needed, borescope inspecting the 
entire length of the inside of the fuel supply hose for twisting. 
Depending on the inspection results, this proposed AD would require 
reinstalling or removing the fuel supply hose from service. This 
proposed AD would also require modifying your helicopter by removing LH 
fuel supply hose P/N 704A34416087 from service and installing improved 
LH fuel supply hose P/N 704A34416101 using updated procedures. 
Additionally, for helicopters modified with the improved LH fuel supply 
hose P/N 704A34416101 using previous procedures or if the installation 
procedures cannot be determined, this proposed AD would require 
repetitive inspections for fuel leakage and, depending on the results, 
tightening the junction nuts of this improved fuel supply hose with the 
LH side engine removed. Tightening the junction nuts would provide 
terminating action for the repetitive fuel leakage inspections. Lastly, 
this proposed AD would require installation limitations for LH fuel 
supply hose P/N 704A34416087 and LH fuel supply hose P/N 704A34416101.

Differences Between This Proposed AD and the EASA AD

    EASA AD 2022-0087 is applicable to all serial-numbered Model 
EC225LP helicopters, whereas this proposed AD would apply to Model 
EC225LP helicopters with certain part-numbered LH fuel supply hoses 
installed.
    For helicopters modified with LH fuel supply hose P/N 704A34416101 
in accordance with previous instructions or by installation of AH 
modification 0728745 prior to initial delivery of the helicopter from 
the manufacturer, EASA AD 2022-0087 requires re-tightening the junction 
nuts to the new torque values during the next (re)installation of the 
LH engine or of the improved fuel supply hose, whereas this proposed AD 
would require that action within 110 hours time-in-service with the LH 
side engine removed for helicopters with LH fuel supply hose P/N 
704A34416101 installed with previous instructions, by installation of 
AH modification 0728745 prior to initial delivery of the helicopter 
from the manufacturer, or if the previously accomplished installation 
procedures cannot be determined. Also, for those helicopters, depending 
on the interim fuel leakage inspection results,

[[Page 23588]]

EASA AD 2022-0087 requires corrective action in accordance with 
approved maintenance instructions, whereas this proposed AD would 
require tightening the junction nuts to the new torque values with the 
LH engine removed.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would 
affect up to 28 helicopters of U.S. Registry. Labor rates are estimated 
at $85 per work-hour. Based on these numbers, the FAA estimates the 
following costs to comply with this proposed AD.
    Visually inspecting the LH fuel supply hose for twisting would take 
about 1 work-hour for an estimated cost of $85 per helicopter and 
$2,380 for the U.S. fleet. Borescope inspecting the LH fuel supply hose 
would take about 8 work-hours for an estimated cost of $680 per 
helicopter.
    Replacing an LH fuel supply hose would take up to 11 work-hours and 
parts would cost about $2,363 for an estimated replacement cost of 
$3,298 per replacement.
    Inspecting for fuel leakage would take about 1 work-hour for an 
estimated cost of $85 per helicopter, per inspection cycle. Removing 
the LH engine and tightening the LH fuel supply hose fittings would 
take 8 work-hours for an estimated cost of $680 per helicopter.

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

    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, 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 2021-05-03, Amendment 39-21864 (86 
FR 72824, December 23, 2021); and
0
b. Adding the following new airworthiness directive:

Airbus Helicopters: Docket No. FAA-2023-0931; Project Identifier 
MCAI-2022-00653-R.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by June 2, 2023.

(b) Affected ADs

    This AD replaces AD 2021-05-03, Amendment 39-21864 (86 FR 72824, 
December 23, 2021).

(c) Applicability

    This AD applies to Airbus Helicopters Model EC225LP helicopters, 
certificated in any category, with a left-hand side (LH) engine fuel 
supply (fuel supply) hose part number (P/N) 704A34416087 or P/N 
704A34416101 installed.

(d) Subject

    Joint Aircraft Service Component (JASC) Code: 2820, Aircraft 
Fuel Distribution System.

(e) Unsafe Condition

    This AD was prompted by a report of an incorrect installation of 
the LH fuel supply hose P/N 704A34416087. The FAA is issuing this AD 
to prevent restricted fuel flow to the LH engine. The unsafe 
condition, if not addressed, could result in a decrease of the LH 
engine power when accelerating to a power setting corresponding to 
One Engine Inoperative power and subsequent reduced control of the 
helicopter.

(f) Compliance

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

(g) Required Actions

    (1) For helicopters with LH fuel supply hose P/N 704A34416087 
installed, within 110 hours time-in-service (TIS) or 6 months after 
the effective date of this AD, whichever occurs first, visually 
inspect the LH fuel supply hose for twisting as shown in Figures 1 
and 2 of Airbus Helicopters Alert Service Bulletin (ASB) No. EC225-
71A019, Revision 2, dated May 21, 2021 (ASB EC225-71A019 Rev 2). If 
the LH fuel supply hose has any twisting or if it cannot be 
determined if the LH fuel supply hose has any twisting, before 
further flight, borescope inspect the entire length of the inside of 
the fuel supply hose for twisting as shown in Figures 3 through 5 of 
ASB EC225-71A019 Rev 2.
    (i) If the inside of the LH fuel supply hose has any twisting, 
before further flight, remove the LH fuel supply hose from service 
and install an airworthy LH fuel supply hose in accordance with the 
actions required by paragraphs (g)(2) or (4) of this AD.
    (ii) If the inside of the LH fuel supply hose does not have any 
twisting, reinstall the LH fuel supply hose by following the 
Accomplishment Instructions, paragraph 3.B.3.b., of ASB EC225-71A019 
Rev 2.
    (2) For helicopters with LH fuel supply hose P/N 704A34416087 
installed, within 1,200 hours TIS or 36 months after the effective 
date of this AD, whichever occurs first, modify your helicopter by 
removing from service LH fuel supply hose P/N 704A34416087 and 
installing LH fuel supply hose P/N 704A34416101 in accordance with 
the Accomplishment Instructions, paragraph 3.B.2.b., of Airbus 
Helicopters ASB No. EC225-28A026, Revision 1, dated May 6, 2022 (ASB 
EC225-28A026 Rev 1).
    (3) For helicopters with LH fuel supply hose P/N 704A34416101 
previously installed by accomplishing Airbus Helicopters ASB No. 
EC225-28A026, Revision 0, dated May 21, 2021, by installation of AH 
modification 0728745 prior to initial delivery of the helicopter 
from the manufacturer, or if the previously accomplished 
installation procedures cannot be determined, accomplish the actions 
required by paragraph (g)(3)(i) of this AD.
    (i) Within 15 hours TIS or 7 days after the effective date of 
this AD, whichever occurs first, and thereafter at intervals not to 
exceed 15 hours TIS or 7 days, whichever occurs first, inspect the 
LH fuel supply hose for fuel leakage in the area of each junction 
nut (items 1a and 1b) as depicted in Figure 1 of ASB EC225-28A026 
Rev 1.
    (A) If there is any fuel leakage, before further flight, remove 
the LH side engine and tighten each junction nut (items 1a and 1b) 
of the LH fuel supply hose by applying the torque depicted in Figure 
1 of ASB EC225-28A026 Rev 1.

[[Page 23589]]

    (B) If there is no fuel leakage, within 110 hours TIS after the 
effective date of this AD, remove the LH side engine and tighten 
each junction nut (items 1a and 1b) of the LH fuel supply hose by 
applying the torque depicted in Figure 1 of ASB EC225-28A026 Rev 1.
    (ii) Tightening the junction nuts as required by paragraphs 
(g)(3)(i)(A) and (B) of this AD constitutes terminating action for 
the repetitive inspection required by paragraph (g)(3)(i) of this 
AD.
    (4) For helicopters with LH fuel supply hose P/N 704A34416087 
installed, as of the effective date of this AD, you may replace an 
LH fuel supply hose P/N 704A34416087 with an LH fuel supply hose P/N 
704A34416087 or reinstall an LH fuel supply hose P/N 704A34416087 on 
any helicopter by following the Accomplishment Instructions, 
paragraph 3.B.3.b., of ASB EC225-71A019 Rev 2, until required to 
install LH fuel supply hose P/N 704A34416101 by paragraph (g)(2) of 
this AD, provided one of the conditions in paragraphs (g)(4)(i) 
through (iii) of this AD is met.
    (i) If installing, the LH fuel supply hose P/N 704A34416087 is 
new (zero total hours TIS).
    (ii) If reinstalling, before reinstallation, the LH fuel supply 
hose P/N 704A34416087 is inspected by accomplishing the actions 
required by the introductory text of paragraph (g)(1) of this AD and 
the inside of the LH fuel supply hose does not have any twisting.
    (iii) If reinstalling, the initial delivery of the helicopter 
from the manufacturer was on or after November 30, 2018, and the LH 
fuel supply hose P/N 704A34416087 has never been previously 
reinstalled.
    (5) For helicopters with an LH fuel supply hose P/N 704A34416101 
installed, as of the effective date of this AD, do not remove LH 
fuel supply hose P/N 704A34416101 and replace it with LH fuel supply 
hose P/N 704A34416087 and do not install an LH engine with an LH 
fuel supply hose P/N 704A34416087 installed.

(h) Credit for Previous Actions

    This paragraph provides credit for the actions specified in 
paragraph (g)(1) of this AD, if those actions were performed before 
the effective date of this AD using Airbus Helicopters ASB No. 
EC225-71A019, Revision 1, dated February 28, 2019.

(i) Special Flight Permits

    Special flight permits may be permitted provided that there are 
no passengers on board and that helicopters identified in paragraph 
(g)(3) of this AD have no fuel leakage.

(j) Alternative Methods of Compliance (AMOCs)

    (1) 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 local Flight 
Standards District Office, as appropriate. If sending information 
directly to the manager of the International Validation Branch, send 
it to the attention of the person identified in paragraph (k)(2) of 
this AD. Information may be emailed to: [email protected].
    (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.

(k) Additional Information

    (1) Refer to European Union Aviation Safety Agency (EASA) AD 
2022-0087, dated May 16, 2022, for related information. This EASA AD 
may be found in the AD docket at regulations.gov under Docket No. 
FAA-2023-0931.
    (2) For more information about this AD, contact Hal Jensen, 
Aerospace Engineer, Operational Safety Branch, Compliance & 
Airworthiness Division, FAA, 26805 E 68th Ave., Mail Stop: Room 214, 
Denver, CO 80249; telephone (303) 342-1080; email 
[email protected].
    (3) Service information identified in this AD that is not 
incorporated by reference is available at the contact information 
specified in paragraphs (l)(5) and (6) of this AD.

(l) 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 the AD specifies otherwise.
    (3) The following service information was approved for IBR on 
[DATE 35 DAYS AFTER PUBLICATION OF THE FINAL RULE].
    (i) Airbus Helicopters Alert Service Bulletin No. EC225-28A026, 
Revision 1, dated May 6, 2022.
    (ii) [Reserved]
    (4) The following service information was approved for IBR on 
January 27, 2022 (86 FR 72824, December 23, 2021).
    (i) Airbus Helicopters Alert Service Bulletin No. EC225-71A019, 
Revision 2, dated May 21, 2021.
    (ii) [Reserved]
    (5) For Airbus Helicopters service information identified in 
this AD, contact Airbus Helicopters, 2701 North Forum Drive, Grand 
Prairie, TX 75052; telephone (972) 641-0000 or (800) 232-0323; fax 
(972) 641-3775; or at airbus.com/helicopters/services/technical-support.html.
    (6) You may view this service information at the FAA, Office of 
the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 
6N-321, Fort Worth, TX 76177. For information on the availability of 
this material at the FAA, call (817) 222-5110.
    (7) 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.

    Issued on April 11, 2023.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2023-08015 Filed 4-17-23; 8:45 am]
BILLING CODE 4910-13-P