preamble attached >>>
ADs updated daily at www.Tdata.com
2021-18-11 LEONARDO S.P.A.: Amendment 39-21712; Docket No. FAA-2021-0507; Project Identifier 2018-SW-117-AD.
(a) EFFECTIVE DATE

    This airworthiness directive (AD) is effective November 1, 2021.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD applies to Leonardo S.p.a. Model AB139 and AW139  helicopters,
    certificated in any category, with  an affected part as identified  in
    European Aviation  Safety Agency  (now European  Union Aviation Safety
    Agency) (EASA)  AD 2018-0292,  dated December  28, 2018  (EASA AD 2018
    -0292).

(d) SUBJECT

    Joint Aircraft Service Component (JASC) Code: 6400, Tail Rotor System.

(e) UNSAFE CONDITION

    This AD was prompted by a report that, during a post-flight inspection
    of an in-service  helicopter, a tail  rotor slider assembly  was found
    fractured, and  the bushing  and the  actuator rod  in the  tail rotor
    servo were partially  damaged. The FAA  is issuing this  AD to address
    corrosion  in  the  tail  rotor  slider  assembly  caused  by improper
    refinishing  (characterized  by signs  of  circumferential refinishing
    consistent  with sanding).  The unsafe  condition,  if  not addressed,
    could result in fatigue cracks  and fracture of the tail  rotor slider
    assembly,  resulting  in  failure  of  the  tail  rotor  controls  and
    consequent loss of yaw 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, EASA AD 2018-0292.

(h) EXCEPTIONS TO EASA AD 2018-0292

(1) Where EASA AD 2018-0292 refers to flight hours (FH),  this AD requires
    using hours time-in-service.

(2) Where EASA AD 2018-0292 refers to its effective date, this AD requires
    using the effective date of this AD.

(3) Where EASA AD 2018-0292 refers to "Part I of the ASB" this AD requires
    using "Part I of section 3., Accomplishment Instructions of the  ASB,"
    and where EASA AD  2018-0292 refers to "Part  II of the ASB,"  this AD
    requires using "Part II of section 3., Accomplishment Instructions  of
    the ASB.".

(4) Where the service information  referred to in EASA AD 2018-0292 speci-
    fies to return certain parts,  this AD does not include  that require-
    ment.

(5) Where the service information  referred to in EASA AD 2018-0292 speci-
    fies to  contact Leonardo  S.p.a. "if  in doubt"  regarding if  a tail
    rotor  slider  assembly needs  to  be replaced  based  on evidence  of
    corrosion  craters,  replacement  of an  affected  slider  assembly is
    required by this AD but contacting Leonardo S.p.a. is not required  by
    this AD.

(6) The "Remarks" section of EASA AD 2018-0292 does not apply to this AD.

(i) NO REPORTING REQUIREMENT

    Although the service information referenced in EASA AD 2018-0292 spec-
    ifies to submit certain information to the manufacturer,  this AD does
    not include that requirement.

(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) of  this AD.  Information may  be
    emailed to: 9-AVS-AIR-730-AMOC@faa.gov.

(2) Before using any approved AMOC,  notify your appropriate principal in-
    spector, or lacking  a principal inspector,  the manager of  the local
    flight standards district office/certificate holding district office.

(k) RELATED INFORMATION

    For more information about this AD,  contact Andrea Jimenez, Aerospace
    Engineer,  COS Program Management Section,  Operational Safety Branch,
    Compliance & Airworthiness Division, FAA, 1600 Stewart Ave, Suite 410,
    Westbury, NY 11590; telephone (516) 228-7330; email andrea.jimenez@faa
    .gov.

(l) 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 Aviation Safety Agency (EASA) AD 2018-0292 dated December 28,
    2018.

(ii) [Reserved]

(3) For EASA AD 2018-0292,  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 EASA AD on the EASA web
    site at https://ad.easa.europa.eu.

(4) 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.  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-2021-0507.

(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/ibr-
    locations.html.

Issued on August 26, 2021. Lance T. Gant, Director, Compliance & Airworth-
iness Division, Aircraft Certification Service.

FOR FURTHER INFORMATION CONTACT:  Andrea Jimenez,  Aerospace Engineer, COS
Program Management Section,  Operational Safety Branch,  Compliance & Air-
worthiness Division, FAA, 1600 Stewart Ave, Suite 410, Westbury, NY 11590;
telephone (516) 228-7330; email andrea.jimenez@faa.gov. nyaco-cos@faa.gov.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2021-0507; Project Identifier 2018-SW-117-AD; Amendment
39-21712; AD 2021-18-11]
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 that, during a post-flight inspection of an in-
service helicopter, a tail rotor slider assembly was found fractured,
and the bushing and the actuator rod in the tail rotor servo were
partially damaged. This AD requires an inspection of the rail rotor
tail rotor slider assembly for corrosion and signs of circumferential
refinishing and, depending on the findings, replacement of the tail
rotor slider assembly with a serviceable part or repetitive inspections
of the tail rotor slider assembly for corrosion and signs of
circumferential refinishing, 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 1, 2021.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of November 1,
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 IBR 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-2021-0507.

Examining the AD Docket

You may examine the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2021-0507; 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
mandatory continuing airworthiness information (MCAI), 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: Andrea Jimenez, Aerospace Engineer,
COS Program Management Section, Operational Safety Branch, Compliance &
Airworthiness Division, FAA, 1600 Stewart Ave., Suite 410, Westbury, NY
11590; telephone (516) 228-7330; email andrea.jimenez@faa.gov. nyaco-cos
@faa.gov.

SUPPLEMENTARY INFORMATION:

Background

The EASA, which is the Technical Agent for the Member States of the
European Union, has issued EASA AD 2018-0292, dated December 28, 2018
(EASA AD 2018-0292) (also referred to as the MCAI), to correct an
unsafe condition for Leonardo S.p.a. (formerly Finmeccanica S.p.A,
AgustaWestland S.p.A., Agusta S.p.A.; AgustaWestland Philadelphia
Corporation, formerly Agusta Aerospace Corporation) Model AB139 and
AW139 helicopters, all serial numbers. Although EASA AD 2018-0292
applies to all Model AB139 and AW139 helicopters, this AD applies to
helicopters with an affected part installed instead.
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 AB139 and AW139 helicopters. The NPRM published in the Federal
Register on June 24, 2021 (86 FR 33149). The NPRM was prompted by a
report that, during a post-flight inspection of an in-service
helicopter, a tail rotor slide assembly was found fractured, and the
bushing and the actuator rod in the tail rotor servo were partially
damaged. The subsequent investigation revealed that the failure was due
to fatigue, initiated from corroded areas (corrosion craters) on the
surface of the tail rotor slider assembly characterized by signs of
circumferential refinishing. The corrosion craters originated along
finishing signs consistent with low grit sanding operations, which can
remove the passivation corrosion protection from the tail rotor slider
assembly. Sanding is a maintenance activity that is not included in the
maintenance manual for Leonardo S.p.a. Model AB139 and AW139
helicopters and is not allowed on in-service helicopters. The NPRM
proposed to require an inspection of the rail rotor tail rotor slider
assembly for corrosion and signs of circumferential refinishing and,
depending on the findings, replacement of the tail rotor slider
assembly with a serviceable part or repetitive inspections of the tail
rotor slider assembly for corrosion and signs of circumferential
refinishing, as specified in EASA AD 2018-0292.
The FAA is issuing this AD to address corrosion in the tail rotor
slider assembly caused by improper refinishing (characterized by signs
of circumferential refinishing consistent with sanding). The unsafe
condition, if not addressed, could result in fatigue crack and fracture
of the tail rotor slider assembly, resulting in failure of the tail
rotor controls and consequent loss of yaw control of the helicopter.
See EASA AD 2018-0292 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 2018-0292 requires a detailed inspection of the tail rotor
slide assembly for corrosion and sign of circumferential refinishing
and, depending on the findings, applicable corrective actions. If there
is any evidence of corrosion craters the corrective action is
replacement of the affected part with a serviceable part. If there is
any evidence of surface imperfections caused by circumferential
refinishing but no evidence of corrosion, the corrective action is
repetitive inspections of the tail rotor slide assembly for corrosion
and signs of circumferential refinishing. Replacement of an affected
part with a serviceable part is terminating action for the repetitive
inspections.
This material is reasonably available because the interested
parties have access to it through their normal course of business or by
the means identified in the ADDRESSES section.

Costs of Compliance

The FAA estimates that this AD affects 129 helicopters of U.S.
Registry. The FAA estimates the following costs to comply with this AD.

Estimated Costs

Action
Labor cost
Parts cost
Cost per product
Cost on U.S. operators
Inspection 1 work-hour x $85 per hour = $85
$0
$85
$10,965

The FAA estimates the following costs to do any necessary
replacement that would be required based on the results of the
inspection. The agency has no way of determining the number of aircraft
that might need this replacement:

On-Condition Costs

Action Labor cost Parts cost Cost per product
Replacement Up to 10 work-hours x $85 per hour = $850 $23,200 Up to $24,050
Inspection 1 work-hour x $85 per hour = $85 per inspection cycle 0 $85 per inspection cycle

The FAA has included all known costs in its cost estimate.
According to the manufacturer, however, some or all of the costs of
this AD may be covered under warranty, thereby reducing the cost impact
on affected operators.

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 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.

Sec. 39.13 [Amended]


2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive: