[Federal Register Volume 63, Number 118 (Friday, June 19, 1998)]
[Rules and Regulations]
[Pages 33529-33530]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-16359]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 33

[Docket No. 98-ANE-119; Special Conditions No. 33-001-SC]


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

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final special conditions.

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SUMMARY: These special conditions are issued for the Turbomeca S.A., of 
Bordes, France, Model Arriel 2S1 turboshaft engine. This engine was 
validated on June 10, 1996, by the Federal Aviation Administration 
(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. These special conditions contain the 
additional safety standards the Administrator considers necessary to 
establish a level of safety equivalent to that established by existing 
airworthiness standards.

EFFECTIVE DATE: June 19, 1998.

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:

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. The FAA published a notice of proposed special conditions on 
April 29, 1998 (63 FR 23402), Docket No. 98-ANE-119, and requested 
public comments.

Type Certification Basis

    Under the provisions of Title 14 of the Code of Federal Regulations 
(14 CFR) Sec. 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

[[Page 33530]]

incorporated by reference in Type Certificate No. E00054EN are 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.

Discussion of Comments

    Interested persons have been afforded the opportunity to 
participate in the making of these special conditions. No comments were 
received on the special conditions as proposed. After careful review of 
the available data, the FAA has determined that air safety and the 
public interest require the adoption of the special conditions without 
change.

Applicability

    As discussed above, these special conditions are applicable to the 
Turbomeca S.A., Model Arriel 2S1 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).
    These special conditions provide necessary increased hover time to 
enable operators to better perform critical, life-saving search and 
rescue missions, particularly in overwater situations. For this reason 
and because a delay would not be in the public interest, the FAA has 
determined that good cause exists for adopting these special conditions 
immediately upon publication.

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. 106(g), 40113, 44701-44702, 44704.

The 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 June 12, 1998.
Jay J. Pardee,
Manager, Engine and Propeller Directorate, Aircraft Certification 
Service.
[FR Doc. 98-16359 Filed 6-18-98; 8:45 am]
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