[Federal Register Volume 87, Number 99 (Monday, May 23, 2022)]
[Rules and Regulations]
[Pages 31116-31119]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2022-11067]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2022-0519; Project Identifier MCAI-2022-00589-R; 
Amendment 39-22050; AD 2022-10-51]
RIN 2120-AA64


Airworthiness Directives; Airbus Helicopters and Airbus 
Helicopters Deutschland GmbH (AHD) Helicopters

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; request for comments.

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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
Airbus Helicopters Model AS350B, AS350B1, AS350B2, AS350B3, AS350BA, 
AS350D, AS355E, AS355F, AS355F1, AS355F2, AS355N, AS355NP, EC130B4, and 
EC130T2 helicopters; and Airbus Helicopters Deutschland GmbH (AHD) 
Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, 
EC135T3, MBB-BK 117 C-2, MBB-BK 117 D-2, and MBB-BK 117 D-3 
helicopters. This AD was prompted by a supplier report of a non-
conformity occurring during production. This AD requires removing 
certain flight control Flexball cables from service and prohibits 
installing those flight control Flexball cables on any helicopter, as 
specified in a European Union Aviation Safety Agency (EASA) AD, which 
is incorporated by reference. This AD also requires reporting certain 
information. The FAA previously sent an emergency AD to all known U.S. 
owners and operators of these helicopters. The FAA is issuing this AD 
to address the unsafe condition on these products.

DATES: This AD is effective June 7, 2022. Emergency AD 2022-10-51, 
issued on May 3, 2022, which contained the requirements of this 
amendment, was effective with actual notice.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of June 7, 
2022.
    The FAA must receive comments on this AD by July 7, 2022.

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 https://www.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.
    For EASA material incorporated by reference (IBR) in this final 
rule, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; 
telephone +49 221 8999 000; email [email protected]; internet 
www.easa.europa.eu. You may find this IBR material on the EASA website 
at https://ad.easa.europa.eu. For Airbus Helicopters service 
information identified in this final rule, 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 https://www.airbus.com/helicopters/services/technical-support.html. You may 
view this material 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. Service information that is IBRed is also 
available in the AD docket at https://www.regulations.gov by searching 
for and locating Docket No. FAA-2022-0519.

Examining the AD Docket

    You may examine the AD docket at https://www.regulations.gov by 
searching for and locating Docket No. FAA-2022-0519; 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 
EASA emergency AD, any comments received, and other information. The 
street address for Docket Operations is listed above. Comments will be 
available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Kristi Bradley, Program Manager, COS 
Program Management Section, Operational Safety Branch, Compliance & 
Airworthiness Division, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 
76177; telephone (817) 222-5110; email [email protected].

SUPPLEMENTARY INFORMATION:

Background

    On May 3, 2022, the FAA issued Emergency AD 2022-10-51 for Airbus 
Helicopters Model AS350B, AS350B1, AS350B2, AS350B3, AS350BA, AS350D, 
AS355E, AS355F, AS355F1, AS355F2, AS355N, AS355NP, EC130B4, and EC130T2 
helicopters; and Airbus Helicopters Deutschland GmbH (AHD) Model 
EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, 
EC135T3, MBB-BK 117 C-2, MBB-BK 117 D-2, and MBB-BK 117 D-3 
helicopters. Emergency AD 2022-10-51 requires removing certain part-
numbered and serial-numbered flight control Flexball cables from 
service and prohibits installing those flight control Flexball cables 
on any helicopter. Emergency AD 2022-10-51 also requires reporting 
certain information to Airbus Helicopters or AHD, as applicable. The 
FAA sent the emergency AD to all known U.S. owners and operators of 
these helicopters. That action was prompted by EASA Emergency AD 2022-
0077-E, dated April 29, 2022 (EASA AD 2022-0077-E), to correct an 
unsafe condition for Airbus Helicopters (AH), formerly Eurocopter, 
Eurocopter France, Aerospatiale, Model AS 350 B, AS 350 B1, AS 350 B2, 
AS 350 B3, AS 350 BA, AS 350 BB, AS 350 D, AS 355 E, AS 355 F, AS 355 
F1, AS 355 F2, AS 355 N, AS 355 NP, EC 130 B4, and EC 130 T2 
helicopters, all serial numbers (S/Ns); and Airbus Helicopters 
Deutschland GmbH (AHD), formerly Eurocopter Deutschland GmbH, 
Eurocopter Espa[ntilde]a S.A., Model EC 135 T1, EC 135 T2, EC 135 T2+, 
EC 135 T3, EC 135 P1, EC 135 P2, EC 135 P2+, EC 135 P3, EC 635 T1, EC 
635 T2+, EC 635 T3, EC 635 P2+, EC 635 P3, MBB-BK 117 D-2, MBB-BK 117 
D-3, MBB-BK 117 D-3m, and MBB-BK 117 C-2 helicopters, all S/Ns.
    The FAA is issuing this AD to address non-conforming flight control 
Flexball cables, which, if not addressed, could result in increased 
friction inside the flight control Flexball cables, jamming of the 
flight controls, and subsequent loss of control of the helicopter. See 
EASA AD 2022-0077-E for additional background information.

Related Service Information Under 1 CFR Part 51

    EASA AD 2022-0077-E requires replacing affected flight control 
Flexball cables with a serviceable part and prohibits installing an 
affected flight control Flexball cable on any helicopter.
    This material is reasonably available because the interested 
parties have access to it through their normal course

[[Page 31117]]

of business or by the means identified in the ADDRESSES section.

Other Related Service Information

    The FAA reviewed Airbus Helicopters Emergency Alert Service 
Bulletin (EASB) AS350 67.00.81, AS355 67.00.49, and EC130 67A023, which 
are co-published as one document along with AS550 67.00.45 (military) 
and AS555 67.00.34 (military), EASB EC135-67A-043, EASB EC135H-67A-016, 
EASB MBB-BK117 C-2-67A-032, and EASB MBB-BK117 D-2-67A-021, each 
Revision 0 and dated April 29, 2022. This service information specifies 
procedures for determining if an affected Flexball is installed. If an 
affected Flexball is installed, or if it cannot be determined if an 
affected Flexball is installed, this service information specifies 
procedures for replacing the Flexball, returning the removed Flexball 
to the supplier, and completing and emailing a reply form sheet to 
Airbus Helicopters Customer Support or Airbus Helicopters Service 
Bulletin Germany, depending on your model helicopter.

FAA's Determination

    These helicopters have 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 emergency AD. The FAA is issuing this 
AD after evaluating all pertinent information and determining that the 
unsafe condition exists and is likely to exist or develop on other 
helicopters of the same type designs.

Requirements of This AD

    This AD requires accomplishing the actions specified in EASA AD 
2022-0077-E, described previously, as IBRed, except for any differences 
identified as exceptions in the regulatory text of this AD and except 
as discussed under ``Differences Between this AD and the EASA AD.''

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, 
EASA AD 2022-0077-E is IBRed in this FAA final rule. This AD, 
therefore, requires compliance with EASA AD 2022-0077-E in its entirety 
through that incorporation, except for any differences identified as 
exceptions in the regulatory text of this AD. Using common terms that 
are the same as the heading of a particular section in EASA AD 2022-
0077-E 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 2022-0077-E. Service information referenced in 
EASA AD 2022-0077-E for compliance will be available at https://www.regulations.gov by searching for and locating Docket No. FAA-2022-
0519 after this final rule is published.

Differences Between This AD and the EASA AD

    EASA AD 2022-0077-E applies to Airbus Helicopters Model AS 350 BB 
helicopters and Airbus Helicopters Deutschland GmbH (AHD) Model EC 635 
T1, EC 635 T2+, EC 635 T3, EC 635 P2+, EC 635 P3, and MBB-BK 117 D-3m 
helicopters. This AD does not apply to those model helicopters because 
those models are not FAA type-certificated and are not included on the 
U.S. type certificate data sheet (TCDS), except where the TCDS explains 
that the Model EC635T2+ helicopter having serial number 0858 was 
converted from Model EC635T2+ to Model EC135T2+. The service 
information referenced in EASA AD 2022-0077-E specifies sending removed 
Flexball cables to the supplier; whereas, this AD requires removing an 
affected part from service. EASA AD 2022-0077-E specifies that a single 
ferry flight without passengers is allowed to a maintenance location 
where the action required by the AD can be accomplished; whereas this 
AD may allow a special flight permit or continuous authorization flight 
for a single flight, provided that there are no passengers onboard and 
that there is no noticeable increase in friction in the flight control 
system. EASA AD 2022-0077-E does not require reporting information; 
whereas, this AD does.

Justification for Immediate Adoption and Determination of the Effective 
Date

    Section 553(b)(3)(B) of the Administrative Procedure Act (APA) (5 
U.S.C. 551 et seq.) authorizes agencies to dispense with notice and 
comment procedures for rules when the agency, for ``good cause,'' finds 
that those procedures are ``impracticable, unnecessary, or contrary to 
the public interest.'' Under this section, an agency, upon finding good 
cause, may issue a final rule without providing notice and seeking 
comment prior to issuance. Further, section 553(d) of the APA 
authorizes agencies to make rules effective in less than thirty days, 
upon a finding of good cause.
    An unsafe condition exists that required the immediate adoption of 
Emergency AD 2022-10-51, issued on May 3, 2022, to all known U.S. 
owners and operators of these helicopters. The FAA found that the risk 
to the flying public justified waiving notice and comment prior to 
adoption of this rule because the affected component is part of the 
flight control system and is critical to the control of a helicopter. A 
non-conforming flight control Flexball cable, if not corrected, could 
result in jamming of the flight controls during various operations and 
phases of flight, and over various terrains. Additionally, the FAA has 
no information pertaining to how quickly the condition may propagate to 
failure. In light of this, the initial actions required by this AD must 
be accomplished before next flight. These conditions still exist, 
therefore, notice and opportunity for prior public comment are 
impracticable and contrary to the public interest pursuant to 5 U.S.C. 
553(b)(3)(B).
    In addition, the FAA finds that good cause exists pursuant to 5 
U.S.C. 553(d) for making this amendment effective in less than 30 days, 
for the same reasons the FAA found good cause to forego notice and 
comment.

Comments Invited

    The FAA invites you to send any written data, views, or arguments 
about this final rule. Send your comments to an address listed under 
ADDRESSES. Include ``Docket No. FAA-2022-0519; Project Identifier MCAI-
2022-00589-R'' at the beginning of your comments. The most helpful 
comments reference a specific portion of the final rule, 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 final rule 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 
https://www.regulations.gov, including any personal information you 
provide. The agency will also post a report summarizing each 
substantive verbal contact received about this final rule.

[[Page 31118]]

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 AD 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 AD, 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 AD. Submissions containing CBI should be sent to Kristi 
Bradley, Program Manager, COS Program Management Section, Operational 
Safety Branch, Compliance & Airworthiness Division, FAA, 10101 Hillwood 
Pkwy., Fort Worth, TX 76177; telephone (817) 222-5110; email 
[email protected]. Any commentary that the FAA receives that is 
not specifically designated as CBI will be placed in the public docket 
for this rulemaking.

Regulatory Flexibility Act

    The requirements of the Regulatory Flexibility Act (RFA) do not 
apply when an agency finds good cause pursuant to 5 U.S.C. 553 to adopt 
a rule without prior notice and comment. Because the FAA has determined 
that it has good cause to adopt this rule without notice and comment, 
RFA analysis is not required.

Costs of Compliance

    The FAA estimates that this AD affects up to 1,785 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 AD.
    Replacing a flight control Flexball cable takes about 8 work-hours 
and parts cost about $804 to $13,555, depending on part number, for an 
estimated cost of $1,484 to $14,235 per helicopter and up to $437,780 
to $4,199,325 for the U.S. fleet (there are up to 295 affected flight 
control Flexball cables installed in the U.S. fleet). Reporting 
information takes about 0.5 work-hour for an estimated cost of $43 per 
helicopter and up to $76,755 for the U.S. fleet.

Paperwork Reduction Act

    A federal agency may not conduct or sponsor, and a person is not 
required to respond to, nor shall a person be subject to penalty for 
failure to comply with a collection of information subject to the 
requirements of the Paperwork Reduction Act unless that collection of 
information displays a currently valid OMB Control Number. The OMB 
Control Number for this information collection is 2120-0056. Public 
reporting for this collection of information is estimated to be 
approximately 0.5 hour per response, including the time for reviewing 
instructions, searching existing data sources, gathering and 
maintaining the data needed, and completing and reviewing the 
collection of information. All responses to this collection of 
information are mandatory. Send comments regarding this burden estimate 
or any other aspect of this collection of information, including 
suggestions for reducing this burden, to: Information Collection 
Clearance Officer, Federal Aviation Administration, 10101 Hillwood 
Parkway, Fort Worth, TX 76177-1524.

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, I certify that this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866, and
    (2) Will not affect intrastate aviation in Alaska.

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:

2022-10-51 Airbus Helicopters and Airbus Helicopters Deutschland 
GmbH (AHD): Amendment 39-22050; Docket No. FAA-2022-0519; Project 
Identifier MCAI-2022-00589-R.

(a) Effective Date

    The FAA issued Emergency Airworthiness Directive (AD) 2022-10-51 
on May 3, 2022, directly to affected owners and operators. As a 
result of such actual notice, that AD was effective for those owners 
and operators on the date it was provided. This AD contains the same 
requirements as that emergency AD and, for those who did not receive 
actual notice, is effective on June 7, 2022.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to the helicopters identified in paragraphs 
(c)(1) and (2) of this AD, certificated in any category.
    (1) Airbus Helicopters Model AS350B, AS350B1, AS350B2, AS350B3, 
AS350BA, AS350D, AS355E, AS355F, AS355F1, AS355F2, AS355N, AS355NP, 
EC130B4, and EC130T2 helicopters.
    Note 1 to paragraph (c)(1): Helicopters with an AS350B3e 
designation are Model AS350B3 helicopters.
    (2) Airbus Helicopters Deutschland GmbH (AHD) Model EC135P1, 
EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, EC135T3, 
MBB-BK 117 C-2, MBB-BK 117 D-2, and MBB-BK 117 D-3 helicopters.
    Note 2 to paragraph (c)(2): Helicopters with an EC135P3H 
designation are Model EC135P3 helicopters. Helicopters with an 
EC135T3H designation are Model EC135T3 helicopters. Helicopters with 
an MBB-BK117 C-2e designation are Model MBB-BK117 C-2 helicopters.

(d) Subject

    Joint Aircraft System Component (JASC) Code: 2700, Flight 
Control System.

(e) Unsafe Condition

    This AD was prompted by a supplier report of a non-conformity 
occurring during

[[Page 31119]]

production. The FAA is issuing this AD to address non-conforming 
flight control Flexball cables. The unsafe condition, if not 
addressed, could result in increased friction inside the flight 
control Flexball cables, jamming of the flight controls, and 
subsequent loss of control of the helicopter.

(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) 
Emergency AD 2022-0077-E, dated April 29, 2022 (EASA AD 2022-0077-
E).

(h) Exceptions to EASA AD 2022-0077-E

    (1) Where EASA AD 2022-0077-E refers to its effective date, this 
AD requires using the effective date of this AD.
    (2) Where the service information referenced in EASA AD 2022-
0077-E specifies returning a part to the supplier, this AD requires 
removing an affected part from service.
    (3) The note to paragraph (1) of EASA AD 2022-0077-E does not 
apply to this AD; instead, see the provisions in paragraph (j) of 
this AD.
    (4) This AD does not mandate compliance with the ``Remarks'' 
section of EASA AD 2022-0077-E.

(i) Reporting Requirement

    Within 10 days after accomplishing the actions required by 
paragraph (g) of this AD, report the information requested in 
Appendix 1 to this AD to the email address identified in paragraph 
(i)(1) or (2) of this AD, depending on your helicopter model.
    (1) For Model AS350B, AS350B1, AS350B2, AS350B3, AS350BA, 
AS350D, AS355E, AS355F, AS355F1, AS355F2, AS355N, AS355NP, EC130B4, 
and EC130T2 helicopters: [email protected].
    (2) For Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, 
EC135T2, EC135T2+, EC135T3, MBB-BK 117 C-2, MBB-BK 117 D-2, and MBB-
BK 117 D-3 helicopters: [email protected].

(j) Special Flight Permit

    A special flight permit or continuous authorization flight for a 
single flight may be issued, provided that there are no passengers 
onboard and that there is no noticeable increase in friction in the 
flight control system.

(k) 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 (l) 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.

(l) Related Information

    For more information about this AD, contact Kristi Bradley, 
Program Manager, COS Program Management Section, Operational Safety 
Branch, Compliance & Airworthiness Division, FAA, 10101 Hillwood 
Pkwy., Fort Worth, TX 76177; telephone (817) 222-5110; email 
[email protected].

(m) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference of the service information listed in this 
paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless this AD specifies otherwise.
    (i) European Union Aviation Safety Agency (EASA) Emergency AD 
2022-0077-E, dated April 29, 2022.
    (ii) [Reserved]
    (3) For EASA AD 2022-0077-E, contact EASA, Konrad-Adenauer-Ufer 
3, 50668 Cologne, Germany; telephone +49 221 8999 000; email 
[email protected]; internet www.easa.europa.eu. You may find the 
EASA material on the EASA website at https://ad.easa.europa.eu.
    (4) 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. This material may be 
found in the AD docket at https://www.regulations.gov by searching 
for and locating Docket No. FAA-2022-0519.
    (5) You may view this material 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: https://www.archives.gov/federal-register/cfr/ibr-locations.html.

Appendix 1 to Airworthiness Directive 2022-10-51

Conformity of the Flexballs (sample format)

    Provide the following information by email as follows:
    For Model AS350B, AS350B1, AS350B2, AS350B3, AS350BA, AS350D, 
AS355E, AS355F, AS355F1, AS355F2, AS355N, AS355NP, EC130B4, and 
EC130T2 helicopters: [email protected].
    For Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, 
EC135T2+, EC135T3, MBB-BK 117 C-2, MBB-BK 117 D-2, and MBB-BK 117 D-
3 helicopters: [email protected].
Helicopter Model and Serial Number:
Flexball Part Number:
Flexball Serial Number:

    Issued on May 9, 2022.
Gaetano A. Sciortino,
Deputy Director for Strategic Initiatives, Compliance & Airworthiness 
Division, Aircraft Certification Service.
[FR Doc. 2022-11067 Filed 5-19-22; 11:15 am]
BILLING CODE 4910-13-P