[Federal Register Volume 63, Number 82 (Wednesday, April 29, 1998)]
[Proposed Rules]
[Pages 23402-23403]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-11337]


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Proposed Rules
                                                Federal Register
________________________________________________________________________

This section of the FEDERAL REGISTER contains notices to the public of 
the proposed issuance of rules and regulations. The purpose of these 
notices is to give interested persons an opportunity to participate in 
the rule making prior to the adoption of the final rules.

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Federal Register / Vol. 63, No. 82 / Wednesday, April 29, 1998 / 
Proposed Rules

[[Page 23402]]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 33

[Docket No. 98-ANE-119; Notice No. 33-98-01-SC]


Special Conditions: Turbomeca S.A., Model Arriel 2S1 Turboshaft 
Engine

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed special conditions.

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SUMMARY: This notice proposes special conditions for the Turbomeca 
S.A., of Bordes, France, Model Arriel 2S1 turboshaft engine. This 
engine was validated on June 10, 1996, by the FAA and Type Certificate 
No. E00054EN was issued. The engine will have an additional new novel 
or unusual engine rating. The applicable airworthiness regulations do 
not contain adequate or appropriate safety standards for this design 
feature. This document contains the additional safety standards that 
the Administrator considers necessary to establish a level of safety 
equivalent to that established by existing airworthiness standards.

DATES: Comments must be submitted on or before May 29, 1998.

ADDRESSES: Comments on this proposal may be mailed in duplicate to: 
Federal Aviation Administration, Office of the Regional Counsel, Attn: 
Rules, Docket No. 98-ANE-119, 12 New England Executive Park, 
Burlington, Massachusetts 01803-5299. Comments must be marked: Docket 
No. 98-ANE-119. Comments may be inspected at this location between 8:00 
a.m. and 4:30 p.m., Monday through Friday, except Federal holidays. 
Comments may also be sent via the Internet using the following address: 
<a href="/cdn-cgi/l/email-protection#4f2f2f76622e2b622a212826212a3f3d203f0f292e2e612b203b61282039">``<span class="__cf_email__" data-cfemail="cbf2e6aaafe6aea5aca2a5aebbb9a4bb8badaaaae5afa4bfe5aca4bd">[email protected]</span></a>''. Comments sent via the Internet must 
contain the docket number in the subject line.

FOR FURTHER INFORMATION CONTACT: Mr. Chung Hsieh, Engine and Propeller 
Standards Staff, ANE-110, Engine and Propeller Directorate, Aircraft 
Certification Service, FAA, New England Region, 12 New England 
Executive Park, Burlington, Massachusetts 01803-5229; (781) 238-7115; 
Fax (781) 238-7199.

SUPPLEMENTARY INFORMATION:

Comments Invited

    Interested persons are invited to participate in the making of 
these proposed special conditions by submitting such written data, 
views, or arguments as they may desire. Communications should identify 
the regulatory docket number and be submitted in duplicate to the 
address specified above. All communications received on or before the 
closing date for comments will be considered by the Administrator. The 
proposals contained in this notice may be changed in light of the 
comments received. All comments submitted will be available in the 
Rules Docket for examination by interested persons, both before and 
after the closing date for comments. A report summarizing each 
substantive public contact with FAA personnel concerning this proposal 
will be filed in the docket. Commenters wishing the FAA to acknowledge 
receipt of their comments submitted in response to this proposed 
special condition must submit with those comments a self-addressed, 
stamped postcard on which the following statement is made: ``Comments 
to Docket No. 98-ANE-119''. The postcard will be date stamped and 
returned to the commenter.

Background

    On March 19, 1998, Turbomeca S.A., applied for an amendment to Type 
Certificate No. E00054EN to include a new 30-minute engine rating to 
Model Arriel 2S1 turboshaft engine. The rating is intended for use up 
to 30 minutes at any time after takeoff in a flight for performing 
search and rescue missions. The Model Arriel 2S1 turboshaft engine will 
be rated at 30-Second one engine inoperative (OEI), 2-Minute OEI, 
Continuous OEI, 30-Minute, Takeoff, and Maximum Continuous ratings.
    The applicable airworthiness requirements do not contain a 
definition for a ``30-minute'' power rating, and do not contain 
adequate or appropriate safety standards of this new and unusual engine 
rating.

Type Certification Basis

    Under the provisions of 14 CFR 21.101, Turbomeca S.A., must show 
that the Model Arriel 2S1 turboshaft engine meets the requirements of 
the applicable regulations in effect on the date of the application, or 
the applicable provisions of the regulations incorporated by reference 
in Type Certificate No. E00054EN. The regulations incorporated by 
reference in the type certificate are commonly referred to as the 
``original type certification basis''. The regulations incorporated by 
reference in Type Certificate No. E00054EN are Secs. 21.29 and part 33, 
effective February 1, 1965, as amended by Amendments 33-1 through 33-
14, and Special Conditions SC-33-ANE-05, Docket No. 95-ANE-46, 
published on April 15, 1996 (61 FR 16375).
    The Administrator finds that the applicable airworthiness 
regulations in part 33, as amended, do not contain adequate or 
appropriate safety standards for the additional new engine rating for 
the Model Arriel 2S1 turboshaft engine because it is a novel or unusual 
engine rating feature, special conditions are prescribed under the 
provision of 14 CFR 21.16.
    Special conditions, as appropriate, are issued in accordance with 
14 CFR 11.49 after public notice, as required by Secs. 11.28 and 
11.29(b), and become part of the type certification basis in accordance 
with 14 CFR 21.101(b)(2).

Novel or Unusual Design Features

    The Turbomeca S.A., Model Arriel 2S1 turboshaft engine will 
incorporate the following novel or unusual design features: Rated 30-
minute power. The power available for rotorcraft hovering to perform 
maritime search and rescue missions is currently limited to the maximum 
continuous rating power under current part 33. The proposed ``30-minute 
power'' rating would provide higher power level than currently 
available for use up to 30 minutes at any time between takeoff and 
landing in one flight. This new rating will enhance rotorcraft safety 
through the availability of increased power for hovering operations 
calling for greater than maximum continuous power.

Applicability

    As discussed above, these special conditions are applicable to the 
Turbomeca S.A., Model Arriel 2S1

[[Page 23403]]

turboshaft engine. Should Turbomeca S.A., of Bordes, France, apply at a 
later date for a change to the type certificate to include another 
model incorporating the same or novel or unusual design feature, the 
special conditions would apply to that model as well under the 
provisions of 14 CFR 21.101(a)(1).

Conclusion

    This action affects only certain novel or unusual design features 
on one model of engines. It is not a rule of general applicability and 
it affects only the applicant who applied to the FAA for approval of 
these features on the engine.

List of Subjects in 14 CFR Part 33

    Air Transportation, Aircraft, Aviation safety, Safety.

    The authority citations for these special conditions is as follows:

    Authority: 49 U.S.C. App. 1354(a), 1421, 1423; 49 U.S.C. 106(g).

The Proposed Special Conditions

    Accordingly, the Federal Aviation Administration (FAA) proposes the 
following special conditions as part of the type certification basis 
for the Turbomeca S.A., Model Arriel 2S1 turboshaft engine:

Section 33.4, Instructions for Continued Airworthiness

    (a) In addition to the requirements of Sec. 33.4, the procedures 
must:
    (1) Ensure that the engine deterioration in service will not exceed 
the level shown in certification using the rated 30-minute rating.
    (2) Be included in the airworthiness limitations section of the 
Instructions for Continued Airworthiness.

Section 33.7, Engine Ratings and Operating Limitations

    (a) In addition to the ratings provided in Sec. 33.7, a ``Rated 30-
minute power'' rating is available, which shall be defined as the 
approved brake horsepower developed under static conditions at 
specified altitudes and temperatures within the operating limitations 
established under part 33 of this chapter, and limited in use to 
periods of not over 30 minutes each.

Section 33.87, Endurance Test.

    (a) Unless already accomplished under Sec. 33.87(d), in addition to 
the requirements of Sec. 33.87, the following test must be conducted:
    Rated 30-minute power. Thirty minutes at rated 30-minute power 
during the twenty -five 6-hour endurance test cycles.

    Issued in Burlington, Massachusetts on April 21, 1998.
Jay J. Pardee,
Manager, Engine and Propeller Directorate, Aircraft Certification 
Service.
[FR Doc. 98-11337 Filed 4-28-98; 8:45 am]
BILLING CODE 4910-13-P


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