[Federal Register: July 2, 2004 (Volume 69, Number 127)]
[Rules and Regulations]
[Page 40307-40309]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr02jy04-1]
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Rules and Regulations
Federal Register
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[[Page 40307]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 25
[Docket No. NM283, Special Conditions No. 25-266-SC]
Special Conditions: Dassault Mystere Falcon Model 20-C5/-D5/-E5/-
F5 and Fanjet Falcon ModelC/D/E/F Series Airplanes; High Intensity
Radiated Fields (HIRF)
AGENCY: Federal Aviation Administration (FAA) DOT.
ACTION: Final special conditions; request for comments.
-----------------------------------------------------------------------
SUMMARY: These special conditions are issued for Dassault Mystere
Falcon Model 20-C5/-D5/-E5/-F5 and Fanjet Falcon Model C/D/E/F series
airplanes modified by Flight Test Associates, Inc. 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
installation of Ametek Model AM-250 barometric altimeters. 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 June 3, 2004.
Comments must be received on or before August 2, 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. NM283 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. NM283.
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-
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 of the airplane and thus delivery of the affected
aircraft. 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 August 11, 2003, Flight Test Associates, Inc., Mojave,
California, applied to the FAA, Los Angeles Aircraft Certification
Office, for a supplemental type certificate (STC) to modify Dassault
Mystere Falcon Model 20-C5/-D5/-E5/-F5 and Fanjet Falcon Model C/D/E/F
series airplanes. The Dassault Mystere Falcon Model 20-C5/-D5/-E5/-F5
and Fanjet Falcon Model C/D/E/F series airplanes are small transport
category airplanes powered by two turbine engines, with maximum takeoff
weights of up to 29,000 pounds. These airplanes operate with a 2-pilot
crew and can seat up to 10 passengers. These models are currently
approved under Type Certificate No. A7EU. The proposed modification
incorporates installation of Ametek Model AM-250 barometric altimeters.
The information this equipment presents is flight critical. The
barometric altimeters to be installed on 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, Flight Test Associates must
show that the Dassault Mystere Falcon Model 20-C5/-D5/-E5/-F5 and
Fanjet Falcon Model C/D/E/F series 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 regulations incorporated by reference in Type Certificate No.
A7EU include Civil Air Regulations (CAR) 4b, as amended by amendments
4b-1 through 4b-12, Special Regulation SR422B, and certain requirements
of 14 CFR part 25, Amendment levels 25-1 through 25-56. 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 Mystere Falcon Model 20-C5/
[[Page 40308]]
-D5/-E5/-F5 and Fanjet Falcon Model C/D/E/F series 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 modified Dassault Mystere Falcon Model 20-C5/-D5/-E5/-
F5 and Fanjet Falcon Model C/D/E/F series 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 Flight Test Associates 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 Mystere Falcon Model 20-C5/
-D5/-E5/-F5 and Fanjet Falcon Model C/D/E/F series airplanes will
incorporate new barometric altimeters that will perform critical
functions. These systems may be vulnerable to HIRF 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 Mystere Falcon Model 20-C5/-D5/-
E5/-F5 and Fanjet Falcon Model C/D/E/F series airplanes. 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 is shown with either HIRF protection
special condition 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 are to be
demonstrated.
------------------------------------------------------------------------
Field strength
(volts per meter)
Frequency ------------------
Peak Average
------------------------------------------------------------------------
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
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
------------------------------------------------------------------------
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
Dassault Mystere Falcon Model 20-C5/-D5/-E5/-F5 and Fanjet Falcon Model
C/D/E/F series airplanes modified by Flight Test Associates. Should
Flight Test Associates 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 apply to that model as well
under the provisions of Sec. 21.101.
Conclusion
This action affects only certain novel or unusual design features
on the Dassault Mystere Falcon Model 20-C5/-D5/-E5/-F5 and Fanjet
Falcon Model C/D/E/F series airplanes modified by Flight Test
Associates. 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 the special conditions for these airplanes 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
0
Accordingly, pursuant to the authority delegated to me by the
Administrator, the following special conditions are issued as part of
the supplemental type
[[Page 40309]]
certification basis for the Dassault Mystere Falcon Model 20-C5/-D5/-
E5/-F5 and Fanjet Falcon Model C/D/E/F series airplanes modified by
Flight Test Associates:
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 June 3, 2004.
Franklin Tiangsing,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 04-15036 Filed 7-1-04; 8:45 am]
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