[Federal Register: September 22, 2004 (Volume 69, Number 183)]
[Rules and Regulations]
[Page 56672-56674]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr22se04-2]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 25
[Docket No. NM289, Special Conditions No. 25-272-SC]
Special Conditions: Dassault Model Mystere-Falcon 20-C5, 20-D5,
20-E5, and 20-F5 Series and Dassault Model Fan Jet Falcon Series C, D,
E, F, and G 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 Dassault Model
Mystere-Falcon 20-C5, 20-D5, 20-E5, and 20-F5 series and Dassault Model
Fan Jet Falcon series C, D, E, F, and G airplanes modified by Genesis3
Engineering. These modified airplanes will have novel and unusual
design features when compared to the state of technology envisioned in
the airworthiness standards for transport category airplanes. The
modification incorporates the installation of an Innovative Solutions &
Support (IS&S) Dual Air Data Display Unit (ADDU) and an Air Data Sensor
Unit (ADS). 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 provided by the existing airworthiness standards.
DATES: The effective date of these special conditions is September 13,
2004. Comments must be received on or before October 22, 2004.
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. NM289, 1601 Lind
Avenue, SW., Renton, Washington, 98055-4056; or delivered in duplicate
to the Transport Airplane Directorate at the above address. All
comments must be marked: Docket No. NM289.
FOR FURTHER INFORMATION CONTACT: Mr. 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-
1320.
SUPPLEMENTARY INFORMATION:
Comments Invited
The FAA has determined that notice and opportunity for prior public
comment is impracticable because these procedures would significantly
delay certification, and thus delivery, of the affected airplanes. In
addition, 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 written 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 March 29, 2004, Genesis3 Engineering, Woodland Park, Colorado,
applied to the FAA, Denver Aircraft Certification Office, for a
supplemental type certificate (STC) to modify Dassault Model Mystere-
Falcon 20-C5, 20-D5, 20-E5, and 20-F5 series and Dassault Model Fan Jet
Falcon series C, D, E, F, and G airplanes. The Dassault Model Mystere-
Falcon 20-C5, 20-D5, 20-E5, and 20-F5 series and Dassault Model Fan Jet
Falcon series C, D, E, F, and G airplanes are small transport category
[[Page 56673]]
airplanes powered by two turbofan engines, with a maximum takeoff
weight of 32,000 pounds. These airplanes operate with a 2-pilot crew
and can hold up to 10 passengers. They are currently approved under
Type Certificate No. A7EU.
The proposed modification incorporates the installation of an
Innovative Solutions & Support (IS&S) Dual Air Data Display Unit (ADDU)
and an Air Data Sensor Unit (ADS). The information these units display
is flight critical. The avionics/electronics and electrical systems to
be installed in this airplane have the potential to be vulnerable to
high-intensity radiated fields (HIRF) external to the airplane.
Type Certification Basis
Under the provisions of 14 CFR 21.101, Amendment 21-69, Genesis3
Engineering must show that the Dassault Model Mystere-Falcon 20-C5, 20-
D5, 20-E5, and 20-F5 series and Dassault Model Fan Jet Falcon series C,
D, E, F, and G airplanes, as changed, continue to meet the applicable
provisions of the regulations incorporated by reference in Type
Certificate No. A7EU, 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 original type certification basis for the Dassault Model
Mystere-Falcon 20-C5, 20-D5, 20-E5, and 20-F5 series and Dassault Model
Fan Jet Falcon series C, D, E, F, and G includes Civil Air Regulations
(CAR) 4b, as amended by amendment 4b-1 through 4b-12, Special
Regulation SR-422B, and provisions of 14 CFR part 25 Amendment 25-4, in
lieu of CAR 4b.350 (e) and (f).
If the Administrator finds that the applicable airworthiness
regulations (i.e., CAR 4b, as amended) do not contain adequate or
appropriate safety standards for the modified Dassault Model Mystere-
Falcon 20-C5, 20-D5, 20-E5, and 20-F5 series and Dassault Model Fan Jet
Falcon series C, D, E, F, and G airplanes because of a novel or unusual
design feature, special conditions are prescribed under the provisions
of Sec. 21.16.
In addition to the applicable airworthiness regulations and special
conditions, the Dassault Model Mystere-Falcon 20-C5, 20-D5, 20-E5, and
20-F5 series and Dassault Model Fan Jet Falcon series C, D, E, F, and G
airplanes must comply with the fuel vent and exhaust emission
requirements of 14 CFR part 34 and the noise certification requirements
of 14 CFR 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(b)(2).
Special conditions are initially applicable to the model for which
they are issued. Should Genesis3 Engineering apply at a later date for
a supplemental type certificate to modify any other model included on
Type Certificate No. A7EU to incorporate the same or similar novel or
unusual design feature, these special conditions would also apply to
the other model under the provisions of Sec. 21.101(a)(1).
Novel or Unusual Design Features
As noted earlier, the modified Dassault Model Mystere-Falcon 20-C5,
20-D5, 20-E5, and 20-F5 series and Dassault Model Fan Jet Falcon series
C, D, E, F, and G airplanes will incorporate an Innovative Solutions &
Support (IS&S) Dual Air Data Display Unit (ADDU) and an Air Data Sensor
Unit (ADS) 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 the Dassault Model Mystere-Falcon 20-C5, 20-
D5, 20-E5, and 20-F5 series and Dassault Model Fan Jet Falcon series C,
D, E, F, and G airplanes modified by Genesis3 Engineering. 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 digital 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 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 following table for the frequency ranges indicated.
Both peak and average field strength components from the table are to
be demonstrated.
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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-70 MHz................................. 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
2GHz-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.
[[Page 56674]]
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
Dassault Model Mystere-Falcon 20-C5, 20-D5, 20-E5, and 20-F5 series and
Dassault Model Fan Jet Falcon series C, D, E, F, and G airplanes.
Should Genesis3 Engineering apply at a later date for a supplemental
type certificate to modify any other model included on Type Certificate
No. A7EU, to incorporate the same or similar novel or unusual design
features, these special conditions would apply to that model as well as
under the provisions of 14 CFR 21.101(a)(1).
Conclusion
This action affects only certain novel or unusual design features
on Dassault Model Mystere-Falcon 20-C5, 20-D5, 20-E5, and 20-F5 series
and Dassault Model Fan Jet Falcon series C, D, E, F, and G airplanes.
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 procedure in several prior instances and has been
derived without substantive change from those previously issued.
Because a delay would significantly affect the certification of the
airplane, which is imminent, 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 record keeping
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
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 Dassault Model
Mystere-Falcon 20-C5, 20-D5, 20-E5, and 20-F5 series and Dassault Model
Fan Jet Falcon series C, D, E, F, and G modified by Genesis3
Engineering:
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 September 13, 2004.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 04-21224 Filed 9-21-04; 8:45 am]
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