[Federal Register: August 27, 2003 (Volume 68, Number 166)]
[Rules and Regulations]
[Page 51436-51438]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr27au03-2]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 25
[Docket No. NM262; Special Conditions No. 25-244-SC]
Special Conditions: Avions Marcel Dassault-Breguet Aviation Model
Falcon 10 Series Airplanes; High-Intensity Radiated Fields (HIRF)
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final special conditions; request for comments.
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SUMMARY: These special conditions are issued for Avions Marcel
Dassault-Breguet Aviation (AMD/BA) Model Falcon 10 series airplanes
modified by Elliott Aviation Technical Products Development, Inc. These
modified airplanes will have a novel or unusual design feature when
compared to the state of technology envisioned in the airworthiness
standards for transport category airplanes. The modification
incorporates the installation of dual Innovative Solutions & Support
(IS&S) Air Data Display Units (ADDU) with the IS&S Air Data Sensor and
an analog interface unit (AIU) that perform critical functions. The
applicable airworthiness regulations do not contain adequate or
appropriate safety standards for the protection of these systems from
the effects of high-intensity-radiated fields (HIRF). These special
conditions contain the additional safety standards that the
Administrator considers necessary to establish a level of safety
equivalent to that established by the existing airworthiness standards.
DATES: The effective date of these special conditions is August 19,
2003.
Comments must be received on or before September 26, 2003.
ADDRESSES: Comments on these special conditions may be mailed in
duplicate to: Federal Aviation Administration, Transport Airplane
Directorate, Attn: Rules Docket (ANM-113), Docket No. NM262, 1601 Lind
Avenue SW., Renton Washington, 98055-4056; or delivered in duplicate to
the Transport Directorate at the above address. All comments must be
marked: Docket No. NM262.
FOR FURTHER INFORMATION CONTACT: Greg Dunn, FAA, Airplane and Flight
Crew Interface Branch, ANM-111, Transport Airplane Directorate,
Aircraft Certification Service, 1601 Lind Avenue SW., Renton,
Washington 98055-4056; telephone (425) 227-2799; facsimile (425) 227-
1149.
SUPPLEMENTARY INFORMATION:
[[Page 51437]]
FAA's Determination as to Need for Public Process
The FAA has determined that notice and opportunity for prior public
comment is unnecessary because the substance of these special
conditions has been subject to the public comment process in several
prior instances with no substantive comments received. The FAA,
therefore, finds that good cause exists for making these special
conditions effective upon issuance; however, the FAA invites interested
persons to participate in this rulemaking by submitting comments, data,
or views. The most helpful comments reference a specific portion of the
special conditions, explain the reason for any recommended change, and
include supporting data. We ask that you send us two copies of written
comments.
We will file in the docket all comments we receive, as well as a
report summarizing each substantive public contact with FAA personnel
concerning these special conditions. The docket is available for public
inspection before and after the comment closing date. If you wish to
review the docket in person, go to the address in the ADDRESSES section
of this preamble between 7:30 a.m. and 4 p.m., Monday through Friday,
except Federal holidays.
We will consider all comments we receive on or before the closing
date for comments. We will consider comments filed late if it is
possible to do so without incurring expense or delay. We may change
these special conditions based on the comments we receive.
If you want the FAA to acknowledge receipt of your comments on
these special conditions, include with your comments a pre-addressed,
stamped postcard on which the docket number appears. We will stamp the
date on the postcard and mail it back to you.
Background
On February 25, 2003, Elliott Aviation Technical Products
Development, Inc., PO Box 100, Quad City Airport, Moline, Illinois
61266-0100, applied for a Supplemental Type Certificate (STC) to modify
Avions Marcel Dassault-Breguet Aviation Model Falcon 10 series
airplanes. This model series is currently approved under Type
Certificate No. A33EU. The Avions Marcel Dassault-Breguet Aviation
Model Falcon 10 series airplanes are a small category airplane powered
by two Airesearch Manufacturing Company TFE731-2-1C turbofan engines,
and have a maximum takeoff weight of 18,300 pounds. This airplane
operates with a 2-pilot crew and can hold up to 9 passengers. The
modification incorporates the installation of Innovative Solutions &
Support (IS&S) Air Data Display Units (ADDU) with an IS&S Air Data
Sensor and Analog Interface Unit (AIU). The ADDU replaces the existing
analog flight instrumentation and provides additional functional
capability and redundancy in the system. The AIU is a digital-to-analog
adapter used to adapt signals driving the existing Sperry Flight
Guidance Computer. The avionics/electronics and electrical systems
installed in this airplane have the potential to be vulnerable to HIRF
external to the airplane.
Type Certification Basis
Under the provisions of 14 CFR 21.101, Elliott Aviation Technical
Products Development, Inc. must show that the Avions Marcel Dassault-
Breguet Aviation Model Falcon 10 series airplanes, as changed, continue
to meet the applicable provisions of the regulations incorporated by
reference in Type Certificate No. A33EU, or the applicable regulations
in effect on the date of application for the change. The regulations
incorporated by reference in the type certificate are commonly referred
to as the ``original type certification basis.'' The certification
basis for the Avions Marcel Dassault-Breguet Aviation Model Falcon 10
series airplanes includes 14 CFR part 25 as amended by Amendments 25-1
through 25-20, dated February 1, 1964, except for special conditions
and exceptions noted in Type Certificate Data Sheet (TDCS) No. A33EU.
If the Administrator finds that the applicable airworthiness
regulations (i.e., part 25, as amended) do not contain adequate or
appropriate safety standards for the Avions Marcel Dassault-Breguet
Aviation Model Falcon 10 series airplanes because of novel or unusual
design features, special conditions are prescribed under the provisions
of Sec. 21.16.
In addition to the applicable airworthiness regulations and special
conditions, the Avions Marcel Dassault-Breguet Aviation Model Falcon 10
series airplanes must comply with the fuel vent and exhaust emission
requirements of 14 CFR part 34 and the noise certification requirement
of part 36.
Special conditions, as defined in 14 CFR 11.19, are issued in
accordance with Sec. 11.38 and become part of the type certification
basis in accordance with Sec. 21.101.
Special conditions are initially applicable to the model for which
they are issued. Should Elliott Aviation Technical Products
Development, Inc. apply at a later date for a supplemental type
certificate to modify any other model included on Type Certificate No.
A33EU to incorporate the same or similar novel or unusual design
feature, these special conditions would also apply to the other model.
Novel or Unusual Design Features
As noted earlier, the Avions Marcel Dassault-Breguet Aviation Model
Falcon 10 series airplanes modified by Elliott Aviation Technical
Products Development, Inc. will incorporate systems comprised of dual
Air Data Display Units and an analog interface unit that will perform
critical functions. These systems may be vulnerable to high-intensity
radiated fields external to the airplane. The current airworthiness
standards of part 25 do not contain adequate or appropriate safety
standards for the protection of this equipment from the adverse effects
of HIRF. Accordingly, this system is considered to be a novel or
unusual design feature.
Discussion
There is no specific regulation that addresses protection
requirements for electrical and electronic systems from HIRF. Increased
power levels from ground-based radio transmitters and the growing use
of sensitive avionics/electronics and electrical systems to command and
control airplanes have made it necessary to provide adequate
protection.
To ensure that a level of safety is achieved equivalent to that
intended by the regulations incorporated by reference, special
conditions are needed for Avions Marcel Dassault-Breguet Aviation Model
Falcon 10 series airplanes modified by Elliott Aviation Technical
Products Development, Inc. These special conditions require that new
avionics/electronics and electrical systems that perform critical
functions be designed and installed to preclude component damage and
interruption of function due to both the direct and indirect effects of
HIRF.
High-Intensity Radiated Fields (HIRF)
With the trend toward increased power levels from ground-based
transmitters, and the advent of space and satellite communications
coupled with electronic command and control of the airplane, the
immunity of critical avionics/electronics and electrical systems to
HIRF must be established.
It is not possible to precisely define the HIRF to which the
airplane will be exposed in service. There is also uncertainty
concerning the effectiveness of airframe shielding for HIRF.
Furthermore, coupling of electromagnetic energy to cockpit-installed
equipment through the cockpit
[[Page 51438]]
window apertures is undefined. Based on surveys and analysis of
existing HIRF emitters, an adequate level of protection exists when
compliance with the HIRF protection special condition is shown with
either paragraph 1, OR 2 below:
1. A minimum threat of 100 volts rms (root-mean-square) per meter
electric field strength from 10 kHz to 18 GHz.
a. The threat must be applied to the system elements and their
associated wiring harnesses without the benefit of airframe shielding.
b. Demonstration of this level of protection is established through
system tests and analysis.
2. A threat external to the airframe of the field strengths
identified in the table below for the frequency ranges indicated. Both
peak and average field strength components from the table below are to
be demonstrated.
------------------------------------------------------------------------
Field Strength (volts
per meter)
Frequency -----------------------
Peak Average
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10 kHz-100 kHz.................................. 50 50
100 kHz-500 kHz................................. 50 50
500 kHz-2 MHz................................... 50 50
2 MHz-30 MHz.................................... 100 100
30 MHz-70MHz.................................... 50 50
70 MHz-100 MHz.................................. 50 50
100 MHz-200 MHz................................. 100 100
200 MHz-400 MHz................................. 100 100
400 MHz-700 MHz................................. 700 50
700 MHz-1 GHz................................... 700 100
1 GHz-2 GHz..................................... 2000 200
2 GHz-4 GHz..................................... 3000 200
4 GHz-6 GHz..................................... 3000 200
6 GHz-8 GHz..................................... 1000 200
8 GHz-12 GHz.................................... 3000 300
12 GHz-18 GHz................................... 2000 200
18 GHz-40 GHz................................... 600 200
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The field strengths are expressed in terms of peak of the root-mean-
square (rms) over the complete modulation period.
The threat levels identified above are the result of an FAA review
of existing studies on the subject of HIRF, in light of the ongoing
work of the Electromagnetic Effects Harmonization Working Group of the
Aviation Rulemaking Advisory Committee.
Applicability
As discussed above, these special conditions are applicable to
Avions Marcel Dassault-Breguet Aviation Model Falcon 10 series
airplanes modified by Elliott Aviation Technical Products Development,
Inc. Should Elliott Aviation Technical Products Development, Inc. apply
at a later date for a supplemental type certificate to modify any other
model included on Type Certificate No. A33EU to incorporate the same or
similar novel or unusual design features, these special conditions
would apply to that model as well.
Conclusion
This action affects only certain novel or unusual design features
on the Avions Marcel Dassault-Breguet Aviation Model Falcon 10 series
airplanes modified by Elliott Aviation Technical Products Development,
Inc. 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
airplane.
The substance of these special conditions has been subjected to the
notice and comment period in several prior instances and has been
derived without substantive change from those previously issued.
Therefore, the FAA has determined that prior public notice and comment
are unnecessary and impracticable, and good cause exists for adopting
these special conditions upon issuance. The FAA is requesting comments
to allow interested persons to submit views that may not have been
submitted in response to the prior opportunities for comment described
above.
List of Subjects in 14 CFR Part 25
Aircraft, Aviation safety, Reporting and recordkeeping
requirements.
0
The authority citation for these special conditions is as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701, 44702, 44704.
The Special Conditions
0
Accordingly, pursuant to the authority delegated to me by the
Administrator, the following special conditions are issued as part of
the supplemental type certification basis for the Avions Marcel
Dassault-Breguet Aviation Model Falcon 10 series airplanes modified by
Elliott Aviation Technical Products Development, Inc.
1. Protection From Unwanted Effects of High-Intensity Radiated
Fields (HIRF). Each electrical and electronic system that performs
critical functions must be designed and installed to ensure that the
operation and operational capability of these systems to perform
critical functions are not adversely affected when the airplane is
exposed to high-intensity radiated fields.
2. For the purpose of these special conditions, the following
definition applies: Critical Functions: Functions whose failure would
contribute to or cause a failure condition that would prevent the
continued safe flight and landing of the airplane.
Issued in Renton, Washington, on August 19, 2003.
Ali Bahrami,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 03-21959 Filed 8-26-03; 8:45 am]
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