[Federal Register Volume 59, Number 83 (Monday, May 2, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-10287]


[[Page Unknown]]

[Federal Register: May 2, 1994]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 29

[Docket No. 93-AWS-1; Special Condition No. 29-ASW-12]

 

Special Condition: European Helicopter Industries, Ltd., Model 
EH-101 Helicopter, Electronic Instrument System

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final special condition.

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SUMMARY: This special condition is issued for the European Helicopter 
Industries, Ltd., Model EH-101 helicopter. This helicopter will have a 
novel or unusual design feature associated with the Electronic 
Instrument System. This special condition contains additional safety 
standards that the Administrator considers necessary to establish a 
level of safety equivalent to that provided by the applicable 
airworthiness standards.

EFFECTIVE DATE: May 2, 1994.

FOR FURTHER INFORMATION CONTACT: Mr. Carroll Wright, FAA, Rotorcraft 
Directorate, Regulations Group, Fort Worth, Texas 76193-0111; telephone 
(817) 222-5120.

SUPPLEMENTARY INFORMATION:

Background

    European Helicopter Industries, Ltd., which consists of Westland 
Helicopters of England and Agusta Helicopters of Italy, submitted 
applications for type certificates dated September 20, 1988, to the FAA 
Brussels Certification Office through the Civil Airworthiness 
Authorities of the United Kingdom for the passenger carrying version of 
the EH-101 and through the Registro Aeronautico Italiano of Italy for 
the utility version.
    The passenger version is a 30 passenger, long range helicopter 
powered by three GE CT 7-6A engines with a maximum takeoff weight of 
31,000 lbs. The utility version is a cargo or mixed passenger and cargo 
helicopter that differs principally from the passenger version in that 
the utility version has a ramp door incorporated in the rear fuselage.

Type Certification Basis

    The certification basis established for the Model EH-101 helicopter 
consists of 14 CFR part 29, including Amendments 29-1 through 29-27, 
and 14 CFR parts 21 and 36; Amendments 21-61 and 36-14, respectively.
    If the Administrator finds that the applicable airworthiness 
regulations do not contain adequate or appropriate safety standards for 
these helicopters because of a novel or unusual design feature, special 
conditions are prescribed under the provisions of Sec. 21.16 to 
establish a level of safety equivalent to that established in the 
regulations.
    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 Sec. 21.101(b)(2) for changes to the type certificates. In 
addition to the applicable airworthiness regulations and special 
conditions, the Model EH-101 must comply with the noise certification 
requirements of part 36, Amendments 36-1 through 36-14.

Novel or Unusual Design Feature

    The European Helicopter Industries, Ltd., Model EH-101 helicopter, 
at the time of application, was identified as incorporating one and 
possibly more electrical or electronic systems that will be performing 
functions critical to the continued safe flight and landing of the 
helicopter. The Electronic Instrument System displays attitude, flight 
data, navigation data, engine, and transmission information. The 
display of attitude, altitude, and airspeed to the pilot is critical to 
the continued safe flight and landing of the helicopter for instrument 
flight rules (IFR) operations in Instrument Meteorological Conditions.
    If it is determined that this helicopter will incorporated other 
electrical or electronic systems performing critical functions, those 
systems also will be required to comply with the requirements of this 
special condition.

Discussion of Comments

    Notice of Proposed Special Condition No. SC-93-1-SW was published 
in the Federal Register on January 8, 1993 (58 FR 3239). No comments 
were received. Therefore, the special condition is adopted as proposed.

Conclusion

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

List of Subjects in 14 CFR Part 29

    Aircraft, Air transportation, Aviation safety, Rotorcraft, Safety.

    The authority citation for this special condition is as follows:

    Authority: 49 U.S.C. 1344, 1348(c), 1352, 1354(a), 1355, 1421 
through 1431, 1502, 1651(b)(2); 42 U.S. 1857f-10, 4321 et seq.; E.O. 
11514, 49 U.S.C. 106(g).

The Special Condition

    Accordingly, pursuant to the authority delegated to me by the 
Administrator, the following special condition is issued as part of the 
type certification basis for the European Helicopter, Ltd., Model EH-
101 helicopter.

Protection for Electrical and Electronic Systems From High Intensity 
Radiated Fields

    Each system that performs critical functions must be designed and 
installed to ensure that the operation and operational capabilities of 
these critical functions are not adversely affected when the helicopter 
is exposed to high intensity radiated fields external to the 
helicopter.

    Issued in Fort Worth, Texas, on April 14, 1994.
Mark R. Schilling,
Acting Manager, Rotorcraft Directorate, Aircraft Certification Service.
[FR Doc. 94-10287 Filed 4-29-94; 8:45 am]
BILLING CODE 4910-13-M