Proposed Rule2021-15475
Airworthiness Directives; Hélicoptères Guimbal Helicopters
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
July 23, 2021
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to adopt a new airworthiness directive (AD) for certain H[eacute]licopt[egrave]res Guimbal Model CABRI G2 helicopters. This proposed AD was prompted by a report that, during scheduled maintenance on two helicopters, cracks were found on a certain main rotor (MR) non-rotating scissor link. This proposed AD would require replacing an affected MR non-rotating scissor link with a serviceable part. The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 86 Issue 139 (Friday, July 23, 2021)</title>
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[Federal Register Volume 86, Number 139 (Friday, July 23, 2021)]
[Proposed Rules]
[Pages 38943-38946]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2021-15475]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0574; Project Identifier 2019-SW-073-AD]
RIN 2120-AA64
Airworthiness Directives; H[eacute]licopt[egrave]res Guimbal
Helicopters
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain H[eacute]licopt[egrave]res Guimbal Model CABRI G2
helicopters. This proposed AD was prompted by a report that,
[[Page 38944]]
during scheduled maintenance on two helicopters, cracks were found on a
certain main rotor (MR) non-rotating scissor link. This proposed AD
would require replacing an affected MR non-rotating scissor link with a
serviceable part. 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 August 23,
2021.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
<bullet> Federal eRulemaking Portal: Go to <a href="https://www.regulations.gov">https://www.regulations.gov</a>. Follow the instructions for submitting comments.
<bullet> Fax: (202) 493-2251.
<bullet> 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.
<bullet> Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
For service information identified in this NPRM, contact
H[eacute]licopt[egrave]res Guimbal, 1070, rue du Lieutenant Parayre,
A[eacute]rodrome d'Aix-en-Provence, 13290 Les Milles, France; telephone
33-04-42-39-10-88; email <a href="/cdn-cgi/l/email-protection#aad9dfdadac5d8deeacddfc3c7c8cbc684c9c5c7"><span class="__cf_email__" data-cfemail="d5a6a0a5a5baa7a195b2a0bcb8b7b4b9fbb6bab8">[email protected]</span></a>; or at <a href="https://www.guimbal.com">https://www.guimbal.com</a>. 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. Service information
that is incorporated by reference is also available at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by searching for and locating Docket No. FAA-2021-
0574.
Examining the AD Docket
You may examine the AD docket at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by
searching for and locating Docket No. FAA-2021-0574; 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 European
Union Aviation Safety Agency (EASA) AD, any comments received, and
other information. The street address for Docket Operations is listed
above.
FOR FURTHER INFORMATION CONTACT: Darren Gassetto, Aerospace Engineer,
COS Program Management Section, Operational Safety Branch, Compliance &
Airworthiness Division, FAA, 1600 Stewart Ave., Suite 410, Westbury, NY
11590; telephone (516) 228-7323; email <a href="/cdn-cgi/l/email-protection#c682a7b4b4a3a8e881a7b5b5a3b2b2a986a0a7a7e8a1a9b0"><span class="__cf_email__" data-cfemail="92d6f3e0e0f7fcbcd5f3e1e1f7e6e6fdd2f4f3f3bcf5fde4">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Comments Invited
The FAA invites you to send any written data, views, or arguments
about this proposal. Send your comments to an address listed under
ADDRESSES. Include ``Docket No. FAA-2021-0574; Project Identifier 2019-
SW-073-AD'' 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
<a href="https://www.regulations.gov">https://www.regulations.gov</a>, 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 AD. Submissions containing CBI should be sent to Darren
Gassetto, Aerospace Engineer, COS Program Management Section,
Operational Safety Branch, Compliance & Airworthiness Division, FAA,
1600 Stewart Ave., Suite 410, Westbury, NY 11590; telephone (516) 228-
7323; email <a href="/cdn-cgi/l/email-protection#b3f7d2c1c1d6dd9df4d2c0c0d6c7c7dcf3d5d2d29dd4dcc5"><span class="__cf_email__" data-cfemail="d793b6a5a5b2b9f990b6a4a4b2a3a3b897b1b6b6f9b0b8a1">[email protected]</span></a>. Any commentary that the FAA
receives which is not specifically designated as CBI will be placed in
the public docket for this rulemaking.
Background
EASA, which is the Technical Agent for the Member States of the
European Union, has issued EASA AD 2019-0186, dated July 30, 2019 (EASA
AD 2019-0186), to correct an unsafe condition for
H[eacute]licopt[egrave]res Guimbal Model CABRI G2 helicopters, all
manufacturer serial numbers. EASA advises that, during scheduled
maintenance on two helicopters, cracks were found on the MR non-
rotating scissor link, part number (P/N) G41-10-200. The suspected root
cause for the cracking is corrosion due to stress induced by the
mounting of the metal bushings inside the lug hole. To address this
issue the manufacturer modified the design of the MR non-rotating
scissor link to reinforce the lugs and replace the metal bushings with
plastic bushings. Cracking of a MR non-rotating scissor link, if not
addressed, could result in failure of that scissor link, resulting in
reduced control of the helicopter.
Accordingly, EASA AD 2019-0186 requires replacement of affected MR
non-rotating scissor links with serviceable parts.
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 AD. The FAA is issuing 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 Guimbal Service Bulletin SB 15-015, Revision C,
dated August 27, 2019. This service information specifies procedures
for, among other actions, modifying the helicopter by replacing the MR
non-rotating scissor link, P/N G41-10-200, with a serviceable part, P/N
G41-10-201 (by installing scissor link assembly, P/N G41-12-100, which
includes MR non-rotating scissor link, P/N G41-10-201) and torqueing
the bolts. 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 Guimbal Service Bulletin SB 15-015, Revision
A, dated July 20, 2015 (SB 15-015, Revision A); and SB 15-015, Revision
B, dated July 12, 2019 (SB 15-015, Revision B). SB 15-015, Revision A,
describes procedures for replacing a MR
[[Page 38945]]
non-rotating scissor link, P/N G41-10-200, with P/N G41-12-100, which
has a new, improved design. Service Bulletin SB 15-015, Revision B,
describes the same procedures as SB 15-015, Revision A, and includes a
revised compliance time, an updated Situation section, and added an
action.
Proposed AD Requirements in This NPRM
This proposed AD would require accomplishing the actions specified
in the service information already described.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 32 helicopters of U.S. registry. The FAA estimates the following
costs to comply with this proposed AD:
Estimated Costs for Required Actions
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Cost per Cost on U.S.
Action Labor cost Parts cost product operators
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Replacement........................... 1 work-hour x $85 per $323 $408 $13,056
hour = $85.
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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 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 that this proposed regulation:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866, and
(2) Would not affect intrastate aviation in Alaska.
(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 adding the following new airworthiness
directive:
H[eacute]licopt[egrave]res Guimbal: Docket No. FAA-2021-0574;
Project Identifier 2019-SW-073-AD.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by August 23, 2021.
(b) Affected ADs
None.
(c) Applicability
This AD applies to H[eacute]licopt[egrave]res Guimbal Model
CABRI G2 helicopters, certificated in any category, with main rotor
(MR) non-rotating scissor links, part number (P/N) G41-10-200
installed.
(d) Subject
Joint Aircraft Service Component (JASC) Code: 6700, Rotorcraft
Flight Control.
(e) Unsafe Condition
This AD was prompted by a report that during scheduled
maintenance on two helicopters, cracks were found on the MR non-
rotating scissor link with part number (P/N) G41-10-200. The FAA is
issuing this AD to address cracking of a MR non-rotating scissor
link. Cracking of a MR non-rotating scissor link, if not addressed,
could result in failure of that scissor link, resulting in reduced
control of the helicopter.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
(1) Within 50 hours time-in-service or 2 months after the
effective date of this AD, whichever occurs first, modify the
helicopter by replacing the MR non-rotating scissor link, P/N G41-
10-200, with a serviceable scissor link assembly, P/N G41-12-100, in
accordance with the Required Actions, IPC 4.1-2 (a) through (d)
inclusive, of Guimbal Service Bulletin SB 15-015, Revision C, dated
August 27, 2019.
(2) As of the effective date of this AD, do not install a MR
non-rotating scissor link, P/N G41-10-200, on any helicopter.
(h) Credit for Previous Actions
This paragraph provides credit for actions required by paragraph
(g)(1) of this AD, if those actions were performed before the
effective date of this AD using the service information specified in
paragraph (h)(1) or (2) of this AD.
(1) Guimbal Service Bulletin SB 15-015, Revision A, dated July
20, 2015.
(2) Guimbal Service Bulletin SB 15-015, Revision B, dated July
12, 2019.
(i) Special Flight Permits
Special flight permits, as described in 14 CFR 21.197 and
21.199, are prohibited.
(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)(1) of
this AD. Information may be emailed to: <a href="/cdn-cgi/l/email-protection#586175190e0b7519110a756f6b68751915171b183e3939763f372e"><span class="__cf_email__" data-cfemail="033a2e4255502e424a512e3430332e424e4c40436562622d646c75">[email protected]</span></a>.
(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.
[[Page 38946]]
(k) Related Information
(1) For more information about this AD, contact Darren Gassetto,
Aerospace Engineer, COS Program Management Section, Operational
Safety Branch, Compliance & Airworthiness Division, FAA, 1600
Stewart Ave., Suite 410, Westbury, NY 11590; telephone (516) 228-
7323; email <a href="/cdn-cgi/l/email-protection#d793b6a5a5b2b9f990b6a4a4b2a3a3b897b1b6b6f9b0b8a1"><span class="__cf_email__" data-cfemail="2165405353444f0f664052524455554e614740400f464e57">[email protected]</span></a>.
(2) For service information identified in this AD, contact
H[eacute]licopt[egrave]res Guimbal, 1070, rue du Lieutenant Parayre,
A[eacute]rodrome d'Aix-en-Provence, 13290 Les Milles, France;
telephone 33-04-42-39-10-88; email <a href="/cdn-cgi/l/email-protection#52212722223d20261235273b3f30333e7c313d3f"><span class="__cf_email__" data-cfemail="c5b6b0b5b5aab7b185a2b0aca8a7a4a9eba6aaa8">[email protected]</span></a>; or at
<a href="https://www.guimbal.com">https://www.guimbal.com</a>. You may view this referenced 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.
(3) The subject of this AD is addressed in European Union
Aviation Safety Agency (EASA) AD 2019-0186, dated July 30, 2019. You
may view the EASA AD at <a href="https://www.regulations.gov">https://www.regulations.gov</a> in Docket No.
FAA-2021-0574.
Issued on July 14, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2021-15475 Filed 7-22-21; 8:45 am]
BILLING CODE 4910-13-P
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