Airworthiness Directives; Leonardo S.p.a. Helicopters, 57574-57577 [2021-22468]
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57574
Federal Register / Vol. 86, No. 198 / Monday, October 18, 2021 / Rules and Regulations
AS350BA, AS350B1, AS350B2, AS350B3,
AS350D, AS355E, AS355F, AS355F1,
AS355F2, AS355N, AS355NP, AS–365N2,
AS 365 N3, EC120B, EC130B4, EC130T2, EC
155B, EC155B1, SA–365N, and SA–365N1
helicopters, and
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–BK117 C–2, and MBB–
BK117 D–2 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: 2500, Cabin Equipment/Furnishings.
(e) Unsafe Condition
This AD was prompted by failure of an
Emergency Flotation System (EFS) float
compartment to inflate during maintenance
of the EFS. The FAA is issuing this AD to
address a blocked float supply hose. The
unsafe condition, if not addressed, could
result in partial inflation of an EFS float
during an emergency landing on water and
subsequently preventing a timely egress from
the helicopter, which could result in injury
to helicopter occupants.
(f) Compliance
Comply with this AD within the
compliance times specified, unless already
done.
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(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, EASA AD 2020–0064.
(h) Exceptions to EASA AD 2020–0064
(1) Where EASA AD 2020–0064 refers to its
effective date, this AD requires using the
effective date of this AD.
(2) Where paragraph (1) of the EASA AD
requires inspecting each affected part within
the compliance time defined in section 1.E of
the applicable ASB, this AD requires
inspecting each affected part within 100
hours time-in-service (TIS) after the effective
date of this AD.
(3) Where the service information
referenced in paragraph (1) of EASA AD
2020–0064 specifies that ‘‘the work must be
performed on the helicopter by the operator,’’
this AD requires that the work be
accomplished by a mechanic that meets the
requirements of 14 CFR part 65 subpart D.
(4) Where the service information
referenced in EASA AD 2020–0064 specifies
replacing or removing an affected hose that
fails the inspection, this AD requires
removing the hose from service.
(5) Where the service information
referenced in EASA AD 2020–0064 specifies
to discard certain parts, this AD requires
removing those parts from service.
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(6) Where the service information
referenced in EASA AD 2020–0064 specifies
returning the EFS to the Safran Aerosystems
network for compliance or returning clogged
hoses to Safran Aerosystems Services, this
AD does not include those requirements.
(7) This AD does not mandate compliance
with the ‘‘Remarks’’ section of EASA AD
2020–0064.
(i) Clarification of Required Service
Information
As required by the Definitions section and
paragraph (4.2) of EASA AD 2020–0064, this
AD requires using Safran Aerosystems
Service Bulletin (SB) 025–69–18, Revision 1,
dated February 4, 2020, or Safran
Aerosystems SB 025–69–18, Revision 2,
dated March 24, 2021.
(j) No Reporting Requirement
Although the service information
referenced in EASA AD 2020–0064 specifies
to submit certain information to the
manufacturer, this AD does not include that
requirement.
(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: 9-AVS-AIR730-AMOC@faa.gov.
(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 Andrea Jimenez, Aerospace Engineer,
Airframe and Propulsion Section, FAA, New
York ACO Branch, 1600 Stewart Avenue,
Suite 410, Westbury, NY 11590; telephone
516–228–7330; fax 516–794–5531; email 9avs-nyaco-cos@faa.gov.
(m) Material Incorporated by Reference
(1) The Director of the Federal Register
approved the incorporation by reference
(IBR) of the service information listed in this
paragraph under 5 U.S.C. 552(a) and 1 CFR
part 51.
(2) You must use this service information
as applicable to do the actions required by
this AD, unless this AD specifies otherwise.
(i) European Union Aviation Safety Agency
(EASA) AD 2020–0064, dated March 19,
2020.
(ii) Safran Aerosystems Service Bulletin
(SB) 025–69–18, Revision 1, dated February
4, 2020.
(iii) Safran Aerosystems SB 025–69–18,
Revision 2, dated March 24, 2021.
(3) For EASA AD 2020–0064, contact the
EASA, Konrad-Adenauer-Ufer 3, 50668
Cologne, Germany; telephone +49 221 8999
PO 00000
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000; email ADs@easa.europa.eu; Internet
www.easa.europa.eu. You may find this
EASA AD on the EASA website at https://
ad.easa.europa.eu. For Safran Aerosystems
service information identified in this AD,
contact Safran Aerosystems, Technical
Publication Department, 61 rue Pierre Curie
CS20001, 78373 Plaisir Cedex, France;
telephone (33) 1 61 34 23 23; fax (33) 1 61
34 24 41; or at https://www.safranaerosystems.com/customers-0.
(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 on
the internet at https://www.regulations.gov
by searching for and locating Docket No.
FAA–2021–0496.
(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
fr.inspection@nara.gov, or go to https://
www.archives.gov/federal-register/cfr/ibrlocations.html.
Issued on September 16, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2021–22467 Filed 10–15–21; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2021–0579; Project
Identifier MCAI–2020–00267–R; Amendment
39–21748; AD 2021–20–10]
RIN 2120–AA64
Airworthiness Directives; Leonardo
S.p.a. Helicopters
Federal Aviation
Administration (FAA), DOT.
ACTION: Final rule.
AGENCY:
The FAA is adopting a new
airworthiness directive (AD) for certain
Leonardo S.p.a. Model AB139 and
AW139 helicopters. This AD was
prompted by a report of several
occurrences of a cracked main gearbox
(MGB) spherical bearing lock nut (lock
nut). This AD requires removing from
service a certain part-numbered MGB
lock nut that is installed on certain partnumbered MGBs and replacing it with
newly designed MGB lock nut. This AD
also prohibits installing any MGB with
the affected MGB lock nut and prohibits
installing any affected MGB lock nut on
any helicopter. The FAA is issuing this
AD to address the unsafe condition on
these products.
SUMMARY:
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Federal Register / Vol. 86, No. 198 / Monday, October 18, 2021 / Rules and Regulations
This AD is effective November
22, 2021.
The Director of the Federal Register
approved the incorporation by reference
of a certain document listed in this AD
as of November 22, 2021.
ADDRESSES: For service information
identified in this final rule, contact
Leonardo S.p.A. Helicopters, Emanuele
Bufano, Head of Airworthiness, Viale
G.Agusta 520, 21017 C.Costa di
Samarate (Va) Italy; telephone +39–
0331–225074; fax +39–0331–229046; or
at https://
customerportal.leonardocompany.com/
en-US/.
You may view the 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. Service
information that is incorporated by
reference is also available at https://
www.regulations.gov by searching for
and locating Docket No. FAA–2021–
0579.
DATES:
Examining the AD Docket
You may examine the AD docket at
https://www.regulations.gov by
searching for and locating Docket No.
FAA–2021–0579; 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 European Union Aviation
Safety Agency (EASA) AD, any
comments received, and other
information. The street address for
Docket Operations is U.S. Department of
Transportation, Docket Operations, M–
30, West Building Ground Floor, Room
W12–140, 1200 New Jersey Avenue SE,
Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Rao
Edupuganti, Aerospace Engineer,
Dynamic Systems Section, Technical
Innovation Policy Branch, Policy &
Innovation Division, FAA, 10101
Hillwood Pkwy., Fort Worth, TX 76177;
telephone (817) 222–5110; email
rao.edupuganti@faa.gov.
SUPPLEMENTARY INFORMATION:
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Background
The FAA issued a notice of proposed
rulemaking (NPRM) to amend 14 CFR
part 39 by adding an AD that would
apply to Leonardo S.p.a. Model AB139
and AW139 helicopters, without MGB
lock nut part number (P/N)
3G6320A09152 installed and with MGB
P/N 3G6320A00131, 3G6320A00132,
3G6320A00133, 3G6320A00134,
3G6320A00135, 3G6320A00136,
3G6320A22031, 4G6320A00132, or
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4G6320A00133 installed; or MGB P/N
3G320A00133 with serial number (S/N)
M23, or MGB P/N 3G6320A00134, with
S/N M6, N76, N92, P124, P129, P131,
P162, P184, Q230, Q243, Q249, R272,
V21, V39, V96, V163, V211, V241, V272,
V281, V384, V386, or V622 installed; or
MGB P/N 3G6320A00136 with S/N
AW1, AW2, AW3, AW5, or AW10
installed. The NPRM published in the
Federal Register on July 26, 2021 (86 FR
39984). In the NPRM, the FAA proposed
to require within 100 hours time in
service (TIS) or during the next
scheduled MGB overhaul, whichever
occurs first after the effective date of
this AD, removing a certain partnumbered MGB lock nut from service
and replacing it with a different partnumbered MGB lock nut. The NPRM
also proposed to prohibit installing an
MGB having an affected MGB lock nut
and also prohibit installing an affected
MGB lock nut on any helicopter as of
the effective date of the NPRM.
The NPRM was prompted a series of
EASA ADs beginning with EASA AD
2019–0036, dated February 15, 2019
(EASA AD 2019–0036), issued by
EASA, which is the Technical Agent for
the Member States of the European
Union, to correct an unsafe condition
for all serial-numbered Leonardo S.p.a.
Helicopters (formerly Finmeccanica
S.p.A, AgustaWestland S.p.A., Agusta
S.p.A.; and AgustaWestland
Philadelphia Corporation, formerly
Agusta Aerospace Corporation) Model
AB139 and AW139 helicopters. EASA
advised that an occurrence was reported
of a cracked MGB lock nut
P/N 3G6310A09151, which is used to
keep the planetary gears in position.
EASA AD 2019–0036 required replacing
each MGB lock nut with an airworthy
MGB lock nut. EASA advised this
condition, if not detected and corrected,
could lead to failure of the MGB
planetary gears, resulting in loss of
control of the helicopter.
After EASA issued EASA AD 2019–
0036, an additional occurrence was
reported of a cracked MGB lock nut
P/N 3G6320A09151. Accordingly, EASA
superseded EASA AD 2019–0036 with
EASA AD 2019–0174, dated July 18,
2019 (EASA AD 2019–0174), which
retained the requirements of EASA AD
2019–0036 but reduced the compliance
times. After EASA issued EASA AD
2019–0174, Leonardo Helicopters issued
Alert Service Bulletin No. 139–609,
dated December 18, 2019 to provide
instructions for replacing the affected
MGB lock nut with MGB lock nut P/N
3G6320A09152, which has a redesigned
flange reducing the stress at the bearing
nut locations where cracks were
detected.
PO 00000
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Accordingly, EASA then issued EASA
AD 2020–0011, dated January 29, 2020,
and corrected January 30, 2020 (EASA
AD 2020–0011), which superseded
EASA AD 2019–0174, and partially
retained the requirements of EASA AD
2019–0174. EASA AD 2020–0011
revised the compliance times in EASA
AD 2019–0174, required replacing each
affected MGB lock nut with a newly
designed MGB lock nut, and prohibited
installing an affected MGB on any
helicopter. After EASA issued EASA AD
2020–0011, EASA identified certain
MGB part numbers that were
inadvertently categorized incorrectly
and therefore listed in the wrong group
of helicopters. Accordingly, EASA
issued EASA AD 2020–0011R1, dated
November 20, 2020 (EASA AD 2020–
011R1), thereby revising EASA AD
2020–0011. EASA AD 2020–0011R1
retains the requirements of EASA AD
2020–0011 and corrects Appendix 1 of
EASA AD 2020–0011.
After EASA issued EASA AD 2020–
0011R1, Leonardo Helicopters issued
Alert Service Bulletin No. 139–609,
Revision A, dated April 13, 2021 (ASB
139–609 Rev A), which identifies an
additional part-numbered MGB, which
is also affected by the unsafe condition.
Accordingly, EASA superseded EASA
AD 2020–0011R1 with EASA AD 2021–
0121, dated May 4, 2021 (EASA AD
2021–0121). EASA AD 2021–0121 adds
an additional part-numbered MGB with
a certain S/N to the list of affected parts.
EASA AD 2021–0121 retains the
requirements of EASA AD 2020–
0011R1, and corrects Table 1 and
Appendix 1 of EASA AD 2020–0011R1.
Discussion of Final Airworthiness
Directive
Comments
The FAA received no comments on
the NPRM or on the determination of
the costs.
Conclusion
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 reviewed
the relevant data and determined that
air safety requires adopting this AD as
proposed. Accordingly, the FAA is
issuing this AD to address the unsafe
condition on these products.
Related Service Information Under 1
CFR Part 51
The FAA reviewed ASB 139–609 Rev
A, which specifies procedures for
replacing an affected MGB lock nut with
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Federal Register / Vol. 86, No. 198 / Monday, October 18, 2021 / Rules and Regulations
the new MGB lock nut, within certain
compliance times for certain partnumbered MGBs with certain serial
numbers.
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 Leonardo
Helicopters ASB No. 139–567, Revision
B, dated October 18, 2019, which
provides additional information for
replacing the MGB lock nut.
Differences Between This AD and EASA
AD 2021–0121
EASA AD 2021–0121 requires a
compliance time based on number of
landings, whereas this AD requires a
compliance time based on hours TIS.
The service information referenced in
EASA AD 2021–0121 requires
submitting certain information and parts
to Leonardo, whereas this AD does not.
EASA AD 2021–0121 applies to all
serial-numbered Model AB139 and
AW139 helicopters, whereas this AD
only applies to Model AB139 and
AW139 helicopters without certain partnumbered MGB lock nuts installed and
with certain part-numbered MGBs
installed.
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Costs of Compliance
The FAA estimates that this AD
affects 130 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 each affected MGB lock nut
with a newly designed MGB lock nut
takes about 190 work-hours (during next
MGB overhaul) and parts cost about
$7,600 for an estimated cost of $23,750
per replacement.
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.
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This regulation is within the scope of
that authority because it addresses an
unsafe condition that is likely to exist or
develop on helicopters identified in this
rulemaking action.
Regulatory Findings
This AD will not have federalism
implications under Executive Order
13132. This AD will not have a
substantial direct effect on the States, on
the relationship between the national
government and the States, or on the
distribution of power and
responsibilities among the various
levels of government.
For the reasons discussed above, I
certify that this AD:
(1) Is not a ‘‘significant regulatory
action’’ under Executive Order 12866,
(2) Will not affect intrastate aviation
in Alaska, and
(3) Will not have a significant
economic impact, positive or negative,
on a substantial number of small entities
under the criteria of the Regulatory
Flexibility Act.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation
safety, Incorporation by reference,
Safety.
The Amendment
Accordingly, under the authority
delegated to me by the Administrator,
the FAA amends 14 CFR part 39 as
follows:
PART 39—AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:
■
Authority: 49 U.S.C. 106(g), 40113, 44701.
§ 39.13
[Amended]
2. The FAA amends § 39.13 by adding
the following new airworthiness
directive:
■
2021–20–10 Leonardo S.p.a.: Amendment
39–21748; Docket No. FAA–2021–0579;
Project Identifier MCAI–2020–00267.
(a) Effective Date
This airworthiness directive (AD) is
effective November 22, 2021.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Leonardo S.p.a. Model
AB139 and AW139 helicopters, certificated
in any category, without main gearbox (MGB)
spherical bearing lock nut (lock nut) part
number (P/N) 3G6320A09152 installed and
with:
(1) MGB P/N 3G6320A00131,
3G6320A00132, 3G6320A00133,
3G6320A00134, 3G6320A00135,
PO 00000
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3G6320A00136, 3G6320A22031,
4G6320A00132, or 4G6320A00133 installed,
or
(2) MGB P/N 3G320A00133 with serial
number (S/N) M23, or MGB P/N
3G6320A00134, with S/N M6, N76, N92,
P124, P129, P131, P162, P184, Q230, Q243,
Q249, R272, V21, V39, V96, V163, V211,
V241, V272, V281, V384, V386, or V622
installed, or
(3) MGB P/N 3G6320A00136 with S/N
AW1, AW2, AW3, AW5, or AW10 installed.
(d) Subject
Joint Aircraft Service Component (JASC)
Code: 6320, Main Rotor Gearbox.
(e) Unsafe Condition
This AD was prompted by a cracked MGB
lock nut. The FAA is issuing this AD to
replace an affected MGB lock nut with a new
MGB lock nut. The unsafe condition, if not
addressed, could result in failure of the MGB
planetary gears, resulting in loss of control of
the helicopter.
(f) Compliance
Comply with this AD within the
compliance times specified, unless already
done.
(g) Required Actions
(1) Within 100 hours time-in-service, or
during the next scheduled MGB overhaul,
whichever occurs first after the effective date
of this AD, remove each MGB lock nut P/N
3G6320A09151 from service and replace with
MGB lock nut P/N 3G6320A09152 in
accordance with Annex A, steps 1 through
17, of Leonardo Helicopters Alert Service
Bulletin No. 139–609, Revision A, dated
April 13, 2021, except you are not required
to send parts to Leonardo Helicopters.
Note to paragraph (g)(1): Leonardo
Helicopters service information refers to an
MGB lock nut as a ring nut.
(2) As of the effective date of this AD, do
not install any MGB having MGB lock nut P/
N 3G630A09151 on any helicopter, and do
not install any MGB lock nut P/N
3G630A09151 on any helicopter.
(h) Special Flight Permits
Special flight permits are prohibited.
(i) 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 (j)(1) of this AD.
Information may be emailed to: 9-AVS-AIR730-AMOC@faa.gov.
(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.
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(j) Related Information
(1) For more information about this AD,
contact Rao Edupuganti, Aerospace Engineer,
Dynamic Systems Section, Technical
Innovation Policy Branch, Policy &
Innovation Division, FAA, 10101 Hillwood
Pkwy., Fort Worth, TX 76177; telephone
(817) 222–5110; email rao.edupuganti@
faa.gov.
(2) The subject of this AD is addressed in
European Union Aviation Safety Agency
(EASA) AD 2021–0121, dated May 4, 2021.
You may view the EASA AD at https://
www.regulations.gov in Docket No. FAA–
2021–0579.
(k) 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 the AD specifies otherwise.
(i) Leonardo Helicopters Alert Service
Bulletin No. 139–609, Revision A, dated
April 13, 2021.
(ii) [Reserved]
(3) For service information identified in
this AD, contact Leonardo S.p.A. Helicopters,
Emanuele Bufano, Head of Airworthiness,
Viale G. Agusta 520, 21017 C. Costa di
Samarate (Va) Italy; telephone +39–0331–
225074; fax +39–0331–229046; or at https://
customerportal.leonardocompany.com/enUS/.
(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.
(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: fr.inspection@nara.gov, or go to:
https://www.archives.gov/federal-register/cfr/
ibr-locations.html.
Issued on September 16, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2021–22468 Filed 10–15–21; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
jspears on DSK121TN23PROD with RULES1
14 CFR Part 39
[Docket No. FAA–2021–0578; Project
Identifier 2018–SW–084–AD; Amendment
39–21741; AD 2021–20–03]
RIN 2120–AA64
Airworthiness Directives; Leonardo
S.p.a. Helicopters
Federal Aviation
Administration (FAA), DOT.
AGENCY:
VerDate Sep<11>2014
16:35 Oct 15, 2021
Jkt 256001
ACTION:
Final rule.
SUPPLEMENTARY INFORMATION:
The FAA is adopting a new
airworthiness directive (AD) for certain
Leonardo S.p.a. Model AW169
helicopters. This AD was prompted by
reports of in-flight pilot collective stick
oscillation. This AD requires a one-time
measurement of the friction of the pilot
collective stick assembly to verify that it
is within the allowable range and,
depending on findings, making an
adjustment to restore the acceptable
level of friction, as specified in a
European Aviation Safety Agency (now
European Union Aviation Safety
Agency) (EASA) AD, which is
incorporated by reference. The FAA is
issuing this AD to address the unsafe
condition on these products.
DATES: This AD is effective November
22, 2021.
The Director of the Federal Register
approved the incorporation by reference
of a certain publication listed in this AD
as of November 22, 2021.
ADDRESSES: For material incorporated
by reference (IBR) in this AD, contact
EASA, Konrad-Adenauer-Ufer 3, 50668
Cologne, Germany; telephone +49 221
8999 000; email ADs@easa.europa.eu;
internet www.easa.europa.eu. You may
find this material on the EASA website
at https://ad.easa.europa.eu. 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. It is also available in the AD
docket at https://www.regulations.gov
by searching for and locating Docket No.
FAA–2021–0578.
SUMMARY:
Examining the AD Docket
You may examine the AD docket at
https://www.regulations.gov by
searching for and locating Docket No.
FAA–2021–0578; 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 AD, any comments
received, and other information. The
address for Docket Operations is U.S.
Department of Transportation, Docket
Operations, M–30, West Building
Ground Floor, Room W12–140, 1200
New Jersey Avenue SE, Washington, DC
20590.
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
Darren.Gassetto@faa.gov.
PO 00000
Frm 00049
Fmt 4700
57577
Sfmt 4700
Background
EASA, which is the Technical Agent
for the Member States of the European
Union, has issued EASA AD 2018–0203,
dated September 12, 2018 (EASA AD
2018–0203) (also referred to as the
Mandatory Continuing Airworthiness
Information, or the MCAI), to correct an
unsafe condition for Leonardo S.p.A.,
formerly Finmeccanica S.p.A. and
AgustaWestland S.p.A., Model AW169
helicopters, all serial numbers equipped
with pilot collective stick assemblies
having part number (P/N)
6F6711A07832 or P/N 6F6711A07831.
The FAA issued a notice of proposed
rulemaking (NPRM) to amend 14 CFR
part 39 by adding an AD that would
apply to certain Leonardo S.p.a. Model
AW169 helicopters. The NPRM
published in the Federal Register on
July 23, 2021 (86 FR 38950). The NPRM
was prompted by reports of in-flight
pilot collective stick oscillation. The
NPRM proposed to require a one-time
measurement of the friction of the pilot
collective stick assembly to verify that it
is within the allowable range and,
depending on findings, making an
adjustment to restore the acceptable
level of friction, as specified in EASA
AD 2018–0203.
The FAA is issuing this AD to address
incorrect adjustment of the pilot
collective stick fixed friction. The
unsafe condition, if not addressed,
could result in reduced controllability
of the helicopter, and subsequent
damage to the helicopter and injury to
occupants. See EASA AD 2018–0203 for
additional background information.
Discussion of Final Airworthiness
Directive
Comments
The FAA gave the public the
opportunity to participate in developing
this final rule. The FAA received no
comments on the NPRM or on the
determination of the cost to the public.
Conclusion
The FAA reviewed the relevant data
and determined that air safety requires
adopting this AD as proposed. Except
for minor editorial changes, this AD is
adopted as proposed in the NPRM.
None of the changes will increase the
economic burden on any operator.
Accordingly, the FAA is issuing this AD
to address the unsafe condition on these
products.
Related Service Information Under 1
CFR Part 51
EASA AD 2018–0203 requires a onetime measurement of the friction of the
E:\FR\FM\18OCR1.SGM
18OCR1
]]>Agencies
[Federal Register Volume 86, Number 198 (Monday, October 18, 2021)]
[Rules and Regulations]
[Pages 57574-57577]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-22468]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0579; Project Identifier MCAI-2020-00267-R;
Amendment 39-21748; AD 2021-20-10]
RIN 2120-AA64
Airworthiness Directives; Leonardo S.p.a. Helicopters
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain Leonardo S.p.a. Model AB139 and AW139 helicopters. This AD was
prompted by a report of several occurrences of a cracked main gearbox
(MGB) spherical bearing lock nut (lock nut). This AD requires removing
from service a certain part-numbered MGB lock nut that is installed on
certain part-numbered MGBs and replacing it with newly designed MGB
lock nut. This AD also prohibits installing any MGB with the affected
MGB lock nut and prohibits installing any affected MGB lock nut on any
helicopter. The FAA is issuing this AD to address the unsafe condition
on these products.
[[Page 57575]]
DATES: This AD is effective November 22, 2021.
The Director of the Federal Register approved the incorporation by
reference of a certain document listed in this AD as of November 22,
2021.
ADDRESSES: For service information identified in this final rule,
contact Leonardo S.p.A. Helicopters, Emanuele Bufano, Head of
Airworthiness, Viale G.Agusta 520, 21017 C.Costa di Samarate (Va)
Italy; telephone +39-0331-225074; fax +39-0331-229046; or at https://customerportal.leonardocompany.com/en-US/.
You may view the 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. Service information that
is incorporated by reference is also available at https://www.regulations.gov by searching for and locating Docket No. FAA-2021-
0579.
Examining the AD Docket
You may examine the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2021-0579; 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
European Union Aviation Safety Agency (EASA) AD, any comments received,
and other information. The street address for Docket Operations is U.S.
Department of Transportation, Docket Operations, M-30, West Building
Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, Washington, DC
20590.
FOR FURTHER INFORMATION CONTACT: Rao Edupuganti, Aerospace Engineer,
Dynamic Systems Section, Technical Innovation Policy Branch, Policy &
Innovation Division, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177;
telephone (817) 222-5110; email [email protected].
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to Leonardo S.p.a. Model
AB139 and AW139 helicopters, without MGB lock nut part number (P/N)
3G6320A09152 installed and with MGB P/N 3G6320A00131, 3G6320A00132,
3G6320A00133, 3G6320A00134, 3G6320A00135, 3G6320A00136, 3G6320A22031,
4G6320A00132, or 4G6320A00133 installed; or MGB P/N 3G320A00133 with
serial number (S/N) M23, or MGB P/N 3G6320A00134, with S/N M6, N76,
N92, P124, P129, P131, P162, P184, Q230, Q243, Q249, R272, V21, V39,
V96, V163, V211, V241, V272, V281, V384, V386, or V622 installed; or
MGB P/N 3G6320A00136 with S/N AW1, AW2, AW3, AW5, or AW10 installed.
The NPRM published in the Federal Register on July 26, 2021 (86 FR
39984). In the NPRM, the FAA proposed to require within 100 hours time
in service (TIS) or during the next scheduled MGB overhaul, whichever
occurs first after the effective date of this AD, removing a certain
part-numbered MGB lock nut from service and replacing it with a
different part-numbered MGB lock nut. The NPRM also proposed to
prohibit installing an MGB having an affected MGB lock nut and also
prohibit installing an affected MGB lock nut on any helicopter as of
the effective date of the NPRM.
The NPRM was prompted a series of EASA ADs beginning with EASA AD
2019-0036, dated February 15, 2019 (EASA AD 2019-0036), issued by EASA,
which is the Technical Agent for the Member States of the European
Union, to correct an unsafe condition for all serial-numbered Leonardo
S.p.a. Helicopters (formerly Finmeccanica S.p.A, AgustaWestland S.p.A.,
Agusta S.p.A.; and AgustaWestland Philadelphia Corporation, formerly
Agusta Aerospace Corporation) Model AB139 and AW139 helicopters. EASA
advised that an occurrence was reported of a cracked MGB lock nut P/N
3G6310A09151, which is used to keep the planetary gears in position.
EASA AD 2019-0036 required replacing each MGB lock nut with an
airworthy MGB lock nut. EASA advised this condition, if not detected
and corrected, could lead to failure of the MGB planetary gears,
resulting in loss of control of the helicopter.
After EASA issued EASA AD 2019-0036, an additional occurrence was
reported of a cracked MGB lock nut P/N 3G6320A09151. Accordingly, EASA
superseded EASA AD 2019-0036 with EASA AD 2019-0174, dated July 18,
2019 (EASA AD 2019-0174), which retained the requirements of EASA AD
2019-0036 but reduced the compliance times. After EASA issued EASA AD
2019-0174, Leonardo Helicopters issued Alert Service Bulletin No. 139-
609, dated December 18, 2019 to provide instructions for replacing the
affected MGB lock nut with MGB lock nut P/N 3G6320A09152, which has a
redesigned flange reducing the stress at the bearing nut locations
where cracks were detected.
Accordingly, EASA then issued EASA AD 2020-0011, dated January 29,
2020, and corrected January 30, 2020 (EASA AD 2020-0011), which
superseded EASA AD 2019-0174, and partially retained the requirements
of EASA AD 2019-0174. EASA AD 2020-0011 revised the compliance times in
EASA AD 2019-0174, required replacing each affected MGB lock nut with a
newly designed MGB lock nut, and prohibited installing an affected MGB
on any helicopter. After EASA issued EASA AD 2020-0011, EASA identified
certain MGB part numbers that were inadvertently categorized
incorrectly and therefore listed in the wrong group of helicopters.
Accordingly, EASA issued EASA AD 2020-0011R1, dated November 20, 2020
(EASA AD 2020-011R1), thereby revising EASA AD 2020-0011. EASA AD 2020-
0011R1 retains the requirements of EASA AD 2020-0011 and corrects
Appendix 1 of EASA AD 2020-0011.
After EASA issued EASA AD 2020-0011R1, Leonardo Helicopters issued
Alert Service Bulletin No. 139-609, Revision A, dated April 13, 2021
(ASB 139-609 Rev A), which identifies an additional part-numbered MGB,
which is also affected by the unsafe condition. Accordingly, EASA
superseded EASA AD 2020-0011R1 with EASA AD 2021-0121, dated May 4,
2021 (EASA AD 2021-0121). EASA AD 2021-0121 adds an additional part-
numbered MGB with a certain S/N to the list of affected parts. EASA AD
2021-0121 retains the requirements of EASA AD 2020-0011R1, and corrects
Table 1 and Appendix 1 of EASA AD 2020-0011R1.
Discussion of Final Airworthiness Directive
Comments
The FAA received no comments on the NPRM or on the determination of
the costs.
Conclusion
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 reviewed the relevant
data and determined that air safety requires adopting this AD as
proposed. Accordingly, the FAA is issuing this AD to address the unsafe
condition on these products.
Related Service Information Under 1 CFR Part 51
The FAA reviewed ASB 139-609 Rev A, which specifies procedures for
replacing an affected MGB lock nut with
[[Page 57576]]
the new MGB lock nut, within certain compliance times for certain part-
numbered MGBs with certain serial numbers.
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 Leonardo Helicopters ASB No. 139-567,
Revision B, dated October 18, 2019, which provides additional
information for replacing the MGB lock nut.
Differences Between This AD and EASA AD 2021-0121
EASA AD 2021-0121 requires a compliance time based on number of
landings, whereas this AD requires a compliance time based on hours
TIS. The service information referenced in EASA AD 2021-0121 requires
submitting certain information and parts to Leonardo, whereas this AD
does not. EASA AD 2021-0121 applies to all serial-numbered Model AB139
and AW139 helicopters, whereas this AD only applies to Model AB139 and
AW139 helicopters without certain part-numbered MGB lock nuts installed
and with certain part-numbered MGBs installed.
Costs of Compliance
The FAA estimates that this AD affects 130 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 each affected MGB lock nut with a newly designed MGB lock
nut takes about 190 work-hours (during next MGB overhaul) and parts
cost about $7,600 for an estimated cost of $23,750 per replacement.
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 helicopters identified in this rulemaking action.
Regulatory Findings
This AD will not have federalism implications under Executive Order
13132. This AD will not have a substantial direct effect on the States,
on the relationship between the national government and the States, or
on the distribution of power and responsibilities among the various
levels of government.
For the reasons discussed above, I certify that this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Will not affect intrastate aviation in Alaska, and
(3) Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
The Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 14 CFR part 39 as follows:
PART 39--AIRWORTHINESS DIRECTIVES
0
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
0
2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive:
2021-20-10 Leonardo S.p.a.: Amendment 39-21748; Docket No. FAA-2021-
0579; Project Identifier MCAI-2020-00267.
(a) Effective Date
This airworthiness directive (AD) is effective November 22,
2021.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Leonardo S.p.a. Model AB139 and AW139
helicopters, certificated in any category, without main gearbox
(MGB) spherical bearing lock nut (lock nut) part number (P/N)
3G6320A09152 installed and with:
(1) MGB P/N 3G6320A00131, 3G6320A00132, 3G6320A00133,
3G6320A00134, 3G6320A00135, 3G6320A00136, 3G6320A22031,
4G6320A00132, or 4G6320A00133 installed, or
(2) MGB P/N 3G320A00133 with serial number (S/N) M23, or MGB P/N
3G6320A00134, with S/N M6, N76, N92, P124, P129, P131, P162, P184,
Q230, Q243, Q249, R272, V21, V39, V96, V163, V211, V241, V272, V281,
V384, V386, or V622 installed, or
(3) MGB P/N 3G6320A00136 with S/N AW1, AW2, AW3, AW5, or AW10
installed.
(d) Subject
Joint Aircraft Service Component (JASC) Code: 6320, Main Rotor
Gearbox.
(e) Unsafe Condition
This AD was prompted by a cracked MGB lock nut. The FAA is
issuing this AD to replace an affected MGB lock nut with a new MGB
lock nut. The unsafe condition, if not addressed, could result in
failure of the MGB planetary gears, resulting in loss of control of
the helicopter.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
(1) Within 100 hours time-in-service, or during the next
scheduled MGB overhaul, whichever occurs first after the effective
date of this AD, remove each MGB lock nut P/N 3G6320A09151 from
service and replace with MGB lock nut P/N 3G6320A09152 in accordance
with Annex A, steps 1 through 17, of Leonardo Helicopters Alert
Service Bulletin No. 139-609, Revision A, dated April 13, 2021,
except you are not required to send parts to Leonardo Helicopters.
Note to paragraph (g)(1): Leonardo Helicopters service
information refers to an MGB lock nut as a ring nut.
(2) As of the effective date of this AD, do not install any MGB
having MGB lock nut P/N 3G630A09151 on any helicopter, and do not
install any MGB lock nut P/N 3G630A09151 on any helicopter.
(h) Special Flight Permits
Special flight permits are prohibited.
(i) 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 (j)(1) 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.
[[Page 57577]]
(j) Related Information
(1) For more information about this AD, contact Rao Edupuganti,
Aerospace Engineer, Dynamic Systems Section, Technical Innovation
Policy Branch, Policy & Innovation Division, FAA, 10101 Hillwood
Pkwy., Fort Worth, TX 76177; telephone (817) 222-5110; email
[email protected].
(2) The subject of this AD is addressed in European Union
Aviation Safety Agency (EASA) AD 2021-0121, dated May 4, 2021. You
may view the EASA AD at https://www.regulations.gov in Docket No.
FAA-2021-0579.
(k) 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 the AD specifies otherwise.
(i) Leonardo Helicopters Alert Service Bulletin No. 139-609,
Revision A, dated April 13, 2021.
(ii) [Reserved]
(3) For service information identified in this AD, contact
Leonardo S.p.A. Helicopters, Emanuele Bufano, Head of Airworthiness,
Viale G. Agusta 520, 21017 C. Costa di Samarate (Va) Italy;
telephone +39-0331-225074; fax +39-0331-229046; or at https://customerportal.leonardocompany.com/en-US/.
(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.
(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: https://www.archives.gov/federal-register/cfr/ibr-locations.html.
Issued on September 16, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2021-22468 Filed 10-15-21; 8:45 am]
BILLING CODE 4910-13-P
