[Federal Register Volume 59, Number 19 (Friday, January 28, 1994)]
[Unknown Section]
[Page ]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-1927]
[Federal Register: January 28, 1994]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 27
[Docket No. 93-ASW-5; Special Condition 27-ASW-2]
Special Condition: Agusta Aerospace Corporation (Agusta) Model
A109C 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 Agusta Model A109C
helicopter. 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
provided by the applicable airworthiness standards.
EFFECTIVE DATE: January 28, 1994.
FOR FURTHER INFORMATION CONTACT:
Mr. Robert McCallister, FAA, Rotorcraft Directorate, Policy and
Procedures Group, Fort Worth, Texas 76193-0112; telephone (817) 222-
5121.
SUPPLEMENTARY INFORMATION:
Background
On July 21, 1993, Agusta Aerospace Corporation, Philadelphia,
Pennsylvania, applied for a Supplemental Type Certificate for
installation of an Electronic Flight Instrument System in the Agusta
Model A109C helicopter. This model is a 7 passenger, 2 engine, 5,997
pound normal category helicopter.
Type Certification Basis
The certification basis established for the Agusta Model A109C
helicopter includes: Federal Aviation Regulation (FAR) Sec. 21.29; part
27 effective February 1, 1965, Amendments 27-1 through 27-8; FAR part
29 dated February 1, 1965, paragraph 29.903(b), for Category ``A''
engine isolation; and equivalent safety in lieu of compliance shown
for: FAR 27.1189 (regarding shut-off means); FAR 27.927(c) as amended
by Amendment 27-12; and Airworthiness Criteria for Helicopter
Instrument Flight, eligible for day and night Instrument Flight Rules
(IFR) operations, with one or two pilots, when Agusta Kit No. 109-0810-
22, Revision E or later approved revision, is incorporated, and the
helicopter is operated in accordance with the Model A109C Rotorcraft
Flight Manual.
If the Administrator finds that the applicable airworthiness
regulations do not contain adequate or appropriate safety standards for
this helicopter 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
FAR Sec. 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.
Novel or Unusual Design Feature
The Agusta Model A109C helicopter was identified as incorporating
one or possibly more electrical, electronic, or combination of
electrical electronic (electrical/electronic) systems that will be
performing 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 to the pilot is critical to the continued safe flight and
landing of the helicopter 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-93-5-SW was published
in the Federal Register on November 17, 1993, (58 FR 60569). 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 27
Aircraft, Air transportation, Aviation safety, Rotorcraft, Safety.
PART 27--[AMENDED]
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 Agusta Model A109C 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 January 19, 1994.
Sanida McRae,
Acting Manager, Rotorcraft Directorate Aircraft Certification Service.
[FR Doc. 94-1927 Filed 1-27-94; 8:45 am]
BILLING CODE 4910-13-M
