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2018-20-03 R1 HOFFMANN GMBH & CO. KG:
Amendment 39-19492; Docket No. FAA-2018-0975; Product Identifier 2018-NE-06-AD.

(a) EFFECTIVE DATE

    This AD is effective December 12, 2018.

(b) AFFECTED ADS

    This  AD  replaces  AD  2018-20-03,  Amendment 39-19437  (83 FR 50821,
    October 10, 2018).

(c) APPLICABILITY

    This  AD  applies  to  Hoffmann GmbH & Co. KG (Hoffmann) model HO-V 62
    propellers  with a propeller blade serial number (S/N) 1 to 6049,  in-
    clusive.  Hoffmann  model  HO-V 62 propeller blades  marked  with  the
    change letter "A" or  "B" suffix to the  S/N are not affected  by this
    AD.

(d) SUBJECT

    Joint Aircraft System Component (JASC) Code 6110, Propeller Assembly.

(e) UNSAFE CONDITION

    This AD was prompted by the failure of the propeller blade lag screws.
    We are issuing the AD to prevent failure of the propeller. The  unsafe
    condition,  if  not addressed,  could  result in  the  release of  the
    propeller blade,  damage to  the aircraft,  and injury  and/or loss of
    life.

(f) COMPLIANCE

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

(g) REQUIRED ACTIONS

    Within  15  days after  the  effective date  of  this AD,  remove  the
    affected  propeller  blades and  install  modified Hoffmann  propeller
    blades marked with a change letter "A" or "B" suffix to the S/N marked
    on the blade.

(h) INSTALLATION PROHIBITION

    After the effective date of this  AD,  do not install a Hoffmann model
    HO-V 62 propeller with  a propeller blade S/N  1 to 6049 if  it is not
    marked with a change letter "A" or "B" suffix to the S/N marked on the
    blade.

(i) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS)

(1) The  Manager,  Boston ACO 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
    certification  office,  send  it  to  the  attention  of  the   person
    identified in paragraph (j)(1) of this AD.

(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.

(j) RELATED INFORMATION

(1) For more information about this AD,  contact Maureen Maisttison, Aero-
    space Engineer, Boston ACO Branch, FAA, 1200 District Ave, Burlington,
    MA 01803;  phone:  781-238-7076;  fax:  781-238-7898;  email: maureen.
    maisttison@faa.gov.

(2) Refer  to  European Aviation Safety Agency (EASA) AD 2017-0220,  dated
    November 10, 2017,  for more information.  You may examine the EASA AD
    in the AD docket  on  the  internet  at  http://www.regulations.gov by
    searching for and locating it in Docket No. FAA-2018-0975.

(k) MATERIAL INCORPORATED BY REFERENCE

    None.

Issued in Burlington, Massachusetts, on November 19, 2018. Robert J Ganley
Manager,  Engine  &  Propeller  Standards  Branch,  Aircraft Certification
Service.

FOR FURTHER INFORMATION CONTACT:  Maureen Maisttison,  Aerospace Engineer,
Boston ACO Branch,  FAA,  1200 District Ave, Burlington, MA, 01803; phone:
781-238-7076; fax: 781-238-7898; email: maureen.maisttison@faa.gov.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0975; Product Identifier 2018-NE-06-AD; Amendment
39-19492; AD 2018-20-03 R1]
RIN 2120-AA64

Airworthiness Directives; Hoffmann GmbH & Co. KG Propellers

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; request for comments.

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

SUMMARY: We are revising airworthiness directive (AD) 2018-20-03 for
certain Hoffmann GmbH & Co. KG (Hoffmann) model HO-V 62 propellers. AD
2018-20-03 required removal of the affected propeller blades and
installation of modified propeller blades marked with a change letter
``A'' or ``B'' suffix. This AD requires the removal and replacement of
the affected propeller blades and installation of modified propeller
blades marked with a change letter ``A'' or ``B'' suffix. This AD was
prompted by a determination that the applicability and installation
prohibition paragraphs of AD 2018-20-03 were incorrect. We
inadvertently included all Hoffmann model HO-V 62 propeller blades that
did not have a change letter ``A'' or ``B'' suffix added to the serial
number (S/N) and marked on the blade in the applicability and
installation prohibition paragraphs of AD 2018-20-03. Only Hoffmann
model HO-V 62 propellers with certain S/Ns without a change letter
``A'' or ``B'' suffix are affected. We are issuing this AD to address
the unsafe condition on these products.

DATES: This AD is effective December 12, 2018.
We must receive any comments on this AD by January 11, 2019.

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 http://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: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE, Washington, DC, 20590, between 9 a.m. and 5 p.m.,
Monday through Friday, except Federal holidays.
For service information identified in this AD, contact Hoffmann
Propeller GmbH & Co. KG, Sales and Service, K[uuml]pferlingstrasse 9,
83022 Rosenheim, Germany; phone: +49 (0) 8031 1878 0; fax: +49 (0) 8031
1878 78; email: info@hoffmann-prop.com. You may view this service
information at the FAA, Engine & Propeller Standards Branch, 1200
District Avenue, Burlington, MA, 01803. For information on the
availability of this material at the FAA, call 781-238-7759. It is also
available on the internet at http://www.regulations.gov by searching
for and locating Docket No. FAA-2018-0975.

Examining the AD Docket

You may examine the AD docket on the internet at http://www.regulations.
gov by searching for and locating Docket No. FAA-2018-
0975; 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,
regulatory evaluation, any comments received, and other information.
The street address for Docket Operations (phone: 800-647-5527) is
listed above. Comments will be available in the AD docket shortly after
receipt.

FOR FURTHER INFORMATION CONTACT: Maureen Maisttison, Aerospace
Engineer, Boston ACO Branch, FAA, 1200 District Ave, Burlington, MA,
01803; phone: 781-238-7076; fax: 781-238-7898; email:
maureen.maisttison@faa.gov.

SUPPLEMENTARY INFORMATION:

Discussion

We issued AD 2018-20-03, Amendment 39-19437 (83 FR 50821, October
10, 2018), (``AD 2018-20-03''), for Hoffmann model HO-V 62 propellers.
AD 2018-20-03 required removal of the affected propeller blades and
installation of modified propeller blades marked with a change letter
``A'' or ``B'' suffix. AD 2018-20-03 resulted from the failure of the
propeller blade lag screws. We issued AD 2018-20-03 to prevent failure
of the propeller.

Actions Since AD 2018-20-03 Was Issued

Since we issued AD 2018-20-03, we determined that we inadvertently
included all Hoffmann S/N model HO-V 62 propeller blades without a
change letter ``A'' or ``B'' suffix in the applicability and
installation prohibition paragraphs of this AD. This AD corrects the
applicability and installation prohibition paragraphs to affect only
Hoffmann model HO-V 62 propeller blades with S/N 1 to 6049, inclusive.
We are issuing this AD to address the unsafe condition on these
products.

Related Service Information

We reviewed Hoffmann Propeller GmbH & Co. KG Service Bulletin (SB)
E34 Rev. B, dated September 18, 2017. The SB describes the instructions
for the removal and installation of the propeller blades. 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.

FAA's Determination

This product has been approved by the European Aviation Safety
Agency (EASA), and is approved for operation in the United States.
Pursuant to our bilateral agreement with the European Community, EASA
has notified us of the unsafe condition described in the MCAI and
service information referenced above. We are issuing this AD because we
evaluated all the relevant information provided by EASA and determined
the unsafe condition described previously is likely to exist or develop
in other products of the same type design.

AD Requirements

This AD requires removal of the affected propeller blades and
installation of modified propeller blades marked with a change letter
``A'' or ``B'' suffix.

FAA's Justification and Determination of the Effective Date

We are revising AD 2018-20-03 to correct the applicability and
installation prohibition paragraphs, which were overly inclusive. We
also reduced the compliance time in this AD to align more closely with
the effective compliance time in AD 2018-20-03. We previously provided
notice and an opportunity to comment on the substance of this
rulemaking and received no comments. Therefore, we find that notice and
opportunity for prior public comment are unnecessary and that good
cause exists for making this amendment effective in less than 30 days.

Comments Invited

This AD is a final rule that involves requirements affecting flight
safety, and we did not provide you with notice and an opportunity to
provide your comments before it becomes effective. However, we invite
you to send any written data, views, or arguments about this final
rule. Send your comments to an address listed under the ADDRESSES
section. Include the docket number FAA-2018-0975 and product identifier
2018-NE-06-AD at the beginning of your comments. We specifically invite
comments on the overall regulatory, economic, environmental, and energy
aspects of this final rule. We will consider all comments received by
the closing date and may amend this final rule because of those
comments.
We will post all comments we receive, without change, to http://www.
regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive about this final rule.

Costs of Compliance

We estimate that this AD affects 50 propellers installed on
airplanes of U.S. registry.
We estimate that 25 propellers will need to be replaced between
overhaul and 25 propellers will need to be replaced at overhaul to
comply with this AD:


Estimated Costs

Action Labor cost Parts cost Cost per product Cost on U.S. operators
Replace blades between overhaul 3 work-hours x $85 per hour = $255 $3,150 $3,405 $85,125
Replace blades at overhaul 0 work-hours x $85 per hour = $0 3,150 3,150 78,750

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.
We are 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.
This AD is issued in accordance with authority delegated by the
Executive Director, Aircraft Certification Service, as authorized by
FAA Order 8000.51C. In accordance with that order, issuance of ADs is
normally a function of the Compliance and Airworthiness Division, but
during this transition period, the Executive Director has delegated the
authority to issue ADs applicable to engines, propellers, and
associated appliances to the Manager, Engine and Propeller Standards
Branch, Policy and Innovation Division.

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) Is not a ``significant rule'' under DOT Regulatory Policies and
Procedures (44 FR 11034, February 26, 1979),
(3) Will not affect intrastate aviation in Alaska, and
(4) 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.

Adoption of the Amendment

Accordingly, under the authority delegated to me by the
Administrator, the FAA amends part 39 of the Federal Aviation
Regulations (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 removing airworthiness directive (AD)
2018-20-03, Amendment 39-19437 (83 FR 50821, October 10, 2018), and
adding the following new AD: