Document ID: FAA-2017-0838-0001
Agency: faa
Document Type: Proposed Rule
Title: Airworthiness Directives: Safran Helicopter Engines, S.A., Turboshaft Engines
Posted Date: 2017-11-03T04:00Z

[Federal Register Volume 82, Number 212 (Friday, November 3, 2017)]
[Proposed Rules]
[Pages 51170-51172]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2017-23606]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2017-0838; Product Identifier 2017-NE-33-AD]
RIN 2120-AA64

Airworthiness Directives; Safran Helicopter Engines, S.A., 
Turboshaft Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to adopt a new airworthiness directive (AD) for all 
Safran Helicopter Engines, S.A., Arriel 2E turboshaft engines. This 
proposed AD was prompted by reports of ruptured front support pins on 
the accessory gearbox front support. This proposed AD would require 
replacement of the accessory gearbox front support. We are proposing 
this AD to address the unsafe condition on these products.

[[Page 51171]]

DATES: We must receive comments on this NPRM by December 18, 2017.

ADDRESSES: You may send comments by any of the following methods:
     Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
     Mail: Docket Management Facility, U.S. Department of 
Transportation, 1200 New Jersey Avenue SE., West Building Ground Floor, 
Room W12-140, Washington, DC 20590-0001.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
     Fax: 202-493-2251.
    For service information identified in this proposed AD, contact 
Safran Helicopter Engines, S.A., 40220 Tarnos, France; phone: (33) 05 
59 74 40 00; fax: (33) 05 59 74 45 15. You may view this service 
information at the FAA, Engine and Propeller Standards Branch, 1200 
District Avenue, Burlington, MA. For information on the availability of 
this material at the FAA, call 781-238-7125.

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-2017-
0838; or in person at the Docket Operations office between 9 a.m. and 5 
p.m., Monday through Friday, except Federal holidays. The AD docket 
contains this proposed AD, the mandatory continuing airworthiness 
information (MCAI), the regulatory evaluation, any comments received, 
and other information. The address for the Docket Office (phone: 800-
647-5527) is in the ADDRESSES section. Comments will be available in 
the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Robert Green, Aerospace Engineer, ECO 
Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781-
238-7754; fax: 781-238-7199; email: [email protected].

SUPPLEMENTARY INFORMATION: 

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposal. Send your comments to an address listed 
under the ADDRESSES section. Include ``Docket No. FAA-2017-0838; 
Product Identifier 2017-NE-33-AD'' at the beginning of your comments. 
We specifically invite comments on the overall regulatory, economic, 
environmental, and energy aspects of this NPRM. We will consider all 
comments received by the closing date and may amend this NPRM 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 
with FAA personnel concerning this NPRM.

Discussion

    The European Aviation Safety Agency (EASA), which is the Technical 
Agent for the Member States of the European Community, has issued EASA 
AD No. 2016-0235, dated November 24, 2016 (referred to hereinafter as 
``the MCAI''), to correct an unsafe condition for the specified 
products. The MCAI states:

    Some cases were reported of ruptured front support pins on 
ARRIEL 1E2 engines. That condition, if not detected and corrected, 
could lead to the loss of the load path integrity of the engine 
front support. Consequently, Turbom[eacute]ca issued Mandatory 
Service Bulletin (MSB) 292 72 0842 to provide instructions for the 
inspection of the pins and front support replacement, and EASA 
issued AD 2015-0064 (later revised) to require those actions. Since 
EASA AD 2015-0064R1 was issued, SAFRAN Helicopter Engines developed 
a new pin design, in order to increase the mechanical strength of 
the pin, through modification TU380, for ARRIEL 1E2 engines. 
Although no cases of front support pin rupture have been reported on 
ARRIEL 2E engines, since the ARRIEL 1E2 and 2E type designs have the 
same front support, SAFRAN Helicopter Engines decided to also apply 
this new pin design on ARRIEL 2E engines through modification TU197. 
To address this potential unsafe condition, SAFRAN Helicopter 
Engines decided, as precautionary measure, to replace the front 
support on ARRIEL 2E engines, and published MSB 292 72 2197 to 
provide instructions for in-service front support replacement. For 
the reasons described above, this AD requires modification of the 
affected engines by replacement of each pre-mod TU197 front support.

    You may obtain further information by examining the MCAI in the AD 
docket on the Internet at http://www.regulations.gov by searching for 
and locating Docket No. FAA-2017-0838.

Related Service Information

    We reviewed Safran Helicopter Engines, S.A., Mandatory Service 
Bulletin (MSB) No. 292 72 2197, Version A, dated September 15, 2016. 
The MSB describes procedures for replacement of the accessory gearbox 
front support. 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 and Requirements of This Proposed AD

    This product has been approved by the aviation authority of France, 
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. We are proposing this AD 
because we evaluated all information provided by EASA and determined 
the unsafe condition exists and is likely to exist or develop on other 
products of the same type design. This proposed AD would require for 
replacement of the accessory gearbox front support.

Costs of Compliance

    We estimate that this proposed AD affects 28 engines installed on 
aircraft of U.S. registry.
    We estimate the following costs to comply with this proposed AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
----------------------------------------------------------------------------------------------------------------
Front support replacement.............  2 work-hours x $85 per           $19,731         $19,901        $557,228
                                         hour = $170.
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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.
    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

[[Page 51172]]

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

    We 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 above, I certify this proposed 
regulation:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Is not a ``significant rule'' under the 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.

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 (AD):

Safran Helicopter Engines, S.A. (Type Certificate previously held by 
Turbomeca, S.A): Docket No. FAA-2017-0838; Product Identifier 2017-
NE-33-AD.

(a) Comments Due Date

    We must receive comments by December 18, 2017.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to all Safran Helicopter Engines S.A. Arriel 2E 
turboshaft engines with front support, part number 0 292 11 715 0, 
installed (pre-mod TU 197 configuration).

(d) Subject

    Joint Aircraft System Component (JASC) Code 8300, Accessory 
Gearboxes.

(e) Reason

    This AD was prompted by reports of ruptured front support pins 
on the accessory gearbox front support. We are issuing this AD to 
prevent failure of a front support, loss of engine thrust control 
and reduced control of the helicopter.

(f) Compliance

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

(g) Required Actions

    Before the accessory gearbox and transmission shaft module 
(Module 01) accumulates 1,600 engine operating hours since new, or 
within 80 engine operating hours after the effective date of this 
AD, whichever occurs later, replace the front support with a part 
eligible for installation.

(h) Definition

    For the purpose of this AD, a part eligible for installation is 
a Module 01 with a pre-mod TU 197 front support, that has not 
accumulated more than 1,680 engine operating hours since new; or a 
Module 01 with a post-mod TU 197 front support.

(i) Installation Prohibition

    As of the effective date of this AD, you may not install a pre-
mod TU 197 front support on any engine with a post-mod TU 197 front 
support installed.

(j) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, FAA, ECO Branch, 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 
ECO Branch, send it to the attention of the person identified in 
paragraph (k)(1) of this AD. You may email your request 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.

(k) Related Information

    (1) For more information about this AD, contact Robert Green, 
Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, 
Burlington, MA 01803; phone: 781-238-7754; fax: 781-238-7199; email: 
[email protected].
    (2) Refer to MCAI EASA AD 2016-0235, dated November 24, 2016, 
for more information. You may examine the MCAI in the AD docket on 
the Internet at http://www.regulations.gov by searching for and 
locating it in Docket No. FAA-2017-0838.

    Issued in Burlington, Massachusetts, on October 24, 2017.
Robert J. Ganley,
Manager, Engine and Propeller Standards Branch, Aircraft Certification 
Service.
[FR Doc. 2017-23606 Filed 11-2-17; 8:45 am]
BILLING CODE 4910-13-P