[Federal Register Volume 60, Number 97 (Friday, May 19, 1995)]
[Rules and Regulations]
[Pages 26823-26824]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 95-12386]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 29
[Docket No. 94-ASW-3; Special Condition 29-ASW-15]
Special Condition: Bell Helicopter Textron Model 222U Helicopter,
Electronic Flight Instrument System
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final special condition.
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SUMMARY: This special condition is issued for the Bell Helicopter
Textron, Inc., Model 222U helicopter modified by Heli-Dyne Systems,
Inc. This helicopter will have a novel or unusual design feature
associated with the Electronic Flight Instrument System. This special
condition contains additional safety standards that the Administrator
considers necessary to establish a level of safety equivalent to that
established by the airworthiness standards.
EFFECTIVE DATE: May 19, 1995.
FOR FURTHER INFORMATION CONTACT:
Mr. Robert McCallister, FAA, Rotorcraft Directorate, Policy and
Procedures Group, Forth Worth, Texas 76193-0110; telephone (817) 222-
5121.
SUPPLEMENTARY INFORMATION:
Background
On May 16, 1994, Heli-Dyne Systems, Inc., Hurst, Texas, applied for
a Supplemental Type Certificate for installation of an Electronic
Flight Instrument System in the Bell Helicopter Textron (BHTI) Model
222U helicopter. This model helicopter is a 10 passenger, 2 engine,
8,250 pound (Category B) or 7,850 pound (Category A) transport category
helicopter.
Type Certification Basis
The certification basis established for the BHTI Model 222U
helicopter includes: 14 CFR 21.29 and part 29 of the Federal Aviation
Regulations (FAR) effective February 1, 1965 (Transport Categories A
and B), Amendments 29-1 through 29-9; Amendment 29-11; Sec. 29.997 of
Amendment 29-10; Sec. 29.927(b)(2) of Amendment 29-17; Secs. 29.801,
29.25(c) 29.865, 29.1557(c), and 29.1555(c) of Amendment 29.12;
Secs. 29.1, 29.79, 29.1517, and 29.1587 of Amendment 29-21; Criteria
for Helicopter Instrument Flight Rule (IFR) certification dated
December 15, 1978; Exemption No. 2789, Sec. 29.811(h)(1) (following
Amendment 24, effective December 6, 1984, Sec. 29.811(h)(1) became
Sec. 29.811(f)(1)); and Exemption No. 4395, Sec. 29.855 (a) and
portions of Sec. 29.855(d).
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 that established in the
regulations.
Special conditions, as appropriate, are issued in accordance with
Sec. 11.49 of the FAR 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). [[Page 26824]]
Novel or Unusual Design Feature
The BHTI Model 222U helicopter, at the time of the application for
modification by Heli-Dyne Systems, Inc., was identified as
incorporating one and possibly more electrical, electronic, or
combination of electrical and electronic (electrical/electronic)
systems that will perform functions critical to the continued safe
flight and landing of the helicopter. The electronic flight instrument
system performs the attitude display function. The display of attitude,
altitude, and airspeed is critical to the continued safe flight and
landing of the helicopters for IFR operations in Instrument
Meteorological Conditions.
If it is determined that these helicopters will incorporate other
electrical/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-94-3-SW was published
in the Federal Register on December 27, 1994 (59 FR 66489). 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.C. 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 Bell Helicopter Textron Model 222U
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
helicopters are exposed to high intensity radiated fields external to
the helicopters.
Issued in Fort Worth, Texas, on May 10, 1995.
Eric Bries,
Acting Manager, Rotorcraft Directorate, Aircraft Certification Service,
ASW-100.
[FR Doc. 95-12386 Filed 5-18-95; 8:45 am]
BILLING CODE 4910-13-M
