Airworthiness standards: Special conditions Turbomeca S.A.,
[Federal Register: June 19, 1998 (Volume 63, Number 118)]
[Rules and Regulations]
[Page 33529-33530]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr19jn98-2]
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.
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. 98-16359Filed6-18-98; 8:45 am]
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