Document ID: FAA-2010-0219-0005
Agency: faa
Document Type: Proposed Rule
Title: Airworthiness Directives: Turbomeca S.A. Turboshaft Engines
Posted Date: 2016-03-11T05:00Z

[Federal Register Volume 81, Number 48 (Friday, March 11, 2016)]
[Proposed Rules]
[Pages 12843-12845]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2016-05461]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-0219; Directorate Identifier 2010-NE-14-AD]
RIN 2120-AA64

Airworthiness Directives; Turbomeca S.A. Turboshaft Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to supersede airworthiness directive (AD) 2010-11-
10 that applies to all Turbomeca S.A., Astazou XIV B and XIV H 
turboshaft engines. AD 2010-11-10 requires inspection of certain third 
stage turbine wheels and removal of any damaged wheel. This AD was 
prompted by a report of a third stage turbine wheel crack detected 
during engine overhaul. This proposed AD would expand the population 
and frequency of repetitive inspections. We are proposing this AD to 
prevent uncontained failure of the third stage turbine wheel, which 
could result in damage to the engine and damage to the helicopter.

DATES: We must receive comments on this proposed AD by May 10, 2016.

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: 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 proposed AD, contact 
Turbomeca 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 & Propeller Directorate, 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-2010-
0219; or in person at the Docket Management Facility 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, 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: Contact Brian Kierstead, Aerospace 
Engineer, Engine Certification Office, FAA, Engine & Propeller 
Directorate, 1200 District Avenue, Burlington, MA 01803; phone: 781-
238-7772, fax: 781-238-7199; email: brian.kierstead@faa.gov.

SUPPLEMENTARY INFORMATION: 

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposed AD. Send your comments to an address 
listed under the ADDRESSES section. Include ``Docket No. FAA-2010-0219; 
Directorate Identifier 2010-NE-14-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of this proposed AD. We 
will consider all comments received by the closing date and may amend 
this proposed AD 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 proposed AD.

Discussion

    On May 19, 2010, we issued AD 2010-11-10, Amendment 39-16315 (75 FR 
30270, June 1, 2010), (``AD 2010-11-10''), for all Turbomeca S.A., 
Astazou XIV B and XIV H turboshaft engines. AD 2010-11-10 requires 
inspection of

[[Page 12844]]

certain third stage turbine wheels and removal of any damaged wheel. AD 
2010-11-10 resulted from European Aviation Safety Agency (EASA) issuing 
an AD to identify and correct an unsafe condition on Turbomeca engines.
    We are issuing this AD to prevent uncontained failures of the third 
stage turbine wheel, which could result in damage to the engine and 
damage to the helicopter.

Actions Since AD 2010-11-10 Was Issued

    Since we issued AD 2010-11-10, Turbomeca reported a cracked third 
stage turbine wheel discovered during engine overhaul. As a result of 
the crack, Turbomeca S.A., expanded the population of affected wheels 
and inspection frequency. Turbomeca S.A., Mandatory Service Bulletin 
(MSB) No. 283 72 0804, Version D, dated July 24, 2015 addresses the 
increased population and inspection frequency. Also, since we issued AD 
2010-11-10, (EASA) has issued AD 2015-0211, dated October 15, 2015, 
which supersedes EASA AD 2010-0004, dated January 5, 2010.

Related Service Information Under 1 CFR Part 51

    Turbomeca S.A., has issued MSB No. 283 72 0804, Version D, dated 
July 24, 2015. That MSB describes procedures for expanding the 
frequency of repetitive inspections. 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 of this NPRM.

Other Related Service Information

    Turbomeca S.A., has issued Service Bulletin (SB) No. 283 72 0805, 
Version B, dated December 15, 2010. That SB describes terminating 
action for the inspections. 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 of this NPRM.

FAA's Determination

    We are proposing this AD because we evaluated all the relevant 
information and determined the unsafe condition described previously is 
likely to exist or develop in other products of the same type design.

Proposed AD Requirements

    This proposed AD would require expanding the frequency of 
repetitive inspections. We are proposing this AD to prevent uncontained 
failure of the third stage turbine wheel, which could result in damage 
to the engine, and damage to the helicopter.

Costs of Compliance

    We estimate that this proposed AD affects seven engines installed 
on helicopters of U.S. registry. We also estimate that it would take 
about 5 hours per engine to comply with this proposed AD. The average 
labor rate is $85 per hour. Based on these figures, we estimate the 
cost of this proposed AD on U.S. operators to be $2,975.

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.

Regulatory Findings

    We have 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 that the 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 to the extent 
that it justifies making a regulatory distinction, 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 removing airworthiness directive (AD) 
2010-11-10, Amendment 39-16315 (75 FR 30270, June 1, 2010), (``AD 2010-
11-10''), and adding the following new AD:

Turbomeca S.A.: Docket No. FAA-2010-0219 Directorate Identifier 
2010-NE-14-AD.

(a) Comments Due Date

    We must receive comments by May 10, 2016.

(b) Affected ADs

    This AD supersedes AD 2010-11-10.

(c) Applicability

    This AD applies to Turbomeca S.A., Astazou XIV B and XIV H 
turboshaft engines with the following part number (P/N) and serial 
number (S/N) third stage turbine wheels that incorporate 
modification AB 173 (Turbomeca S.A., Service Bulletin (SB) No. 283 
72 0091) or modification AB 208 (Turbomeca S.A., SB No. 283 72 
0117). This AD does not apply to third stage turbine wheels that 
incorporate Turbomeca SB No. 283 72 805.
    (1) Third stage turbine wheels, P/N 0 265 25 700 0, all S/Ns;
    (2) Third stage turbine wheels, P/N 0 265 25 702 0, all S/Ns;
    (3) Third stage turbine wheels, P/N 0 265 25 706 0, all S/Ns;
    (4) Third stage turbine wheels, P/N 0 265 25 705 0, with an S/N 
listed in Appendix 2.1 of Turbomeca S.A., Mandatory Service Bulletin 
(MSB) No. 283 72 0804, Version D, dated July 24, 2015.

(d) Unsafe Condition

    This AD was prompted by a report of a third stage turbine wheel 
crack detected during engine overhaul. We are issuing this AD to 
prevent uncontained failure of the third stage turbine wheel, which 
could result in damage to the engine and damage to the helicopter.

(e) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.
    (1) Perform a dye penetrant inspection of the third stage 
turbine wheel. Use paragraph

[[Page 12845]]

2.4.2.2 of Turbomeca S.A., MSB No. 283 72 0804, Version D, dated 
July 24, 2015, to do the inspection, as follows:
    (i) Inspect third stage turbine wheels with 300 engine cycles 
(EC) or more accumulated since last inspection, or since new, or 
since last overhaul, or since repair, within 100 EC after the 
effective date of this AD.
    (ii) Inspect third stage turbine wheels with less than 300 EC 
accumulated since last inspection, or since new, or since last 
overhaul, or since repair, within 400 EC since last inspection, or 
since new, or since last overhaul, or since repair.
    (2) Repeat the inspection required by this AD within 400 EC 
since last inspection.
    (3) Remove from service any third stage turbine wheels that fail 
the inspection required by this AD.

(f) Optional Terminating Action

    Application of Turbomeca S.A., SB No. 283 72 0805, Version B, 
dated December 15, 2010 is terminating action for the inspections 
required by paragraphs (e)(1) and (e)(2) of this AD.

(g) Alternative Methods of Compliance (AMOCs)

    The Manager, Engine Certification Office, may approve AMOCs for 
this AD. Use the procedures found in 14 CFR 39.19 to make your 
request. You may email your request to: ANE-AD-AMOC@faa.gov.

(h) Related Information

    (1) For more information about this AD, contact Brian Kierstead, 
Aerospace Engineer, Engine Certification Office, FAA, Engine & 
Propeller Directorate, 1200 District Avenue, Burlington, MA 01803; 
phone: 781-238-7772; fax: 781-238-7199; email: 
brian.kierstead@faa.gov.
    (2) Refer to MCAI EASA AD 2015-0211, dated October 15, 2015, for 
related 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-2010-0219.
    (3) Turbomeca S.A., MSB No. 283 72 0804, Version D, dated July 
24, 2015 and Turbomeca S.A., SB No. 283 72 0805, Version B, dated 
December 15, 2010, can be obtained from Turbomeca, using the contact 
information in paragraph (h)(4) of this AD.
    (4) For service information identified in this proposed AD, 
contact Turbomeca S.A., 40220 Tarnos, France; phone: (33) 05 59 74 
40 00; fax: (33) 05 59 74 45 15.
    (5) You may view this service information at the FAA, Engine & 
Propeller Directorate, 1200 District Avenue, Burlington, MA. For 
information on the availability of this material at the FAA, call 
781-238-7125.

    Issued in Burlington, Massachusetts, on February 26, 2016.
Colleen M. D'Alessandro,
Manager, Engine & Propeller Directorate, Aircraft Certification 
Service.
[FR Doc. 2016-05461 Filed 3-10-16; 8:45 am]
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