[Federal Register: January 6, 2005 (Volume 70, Number 4)]
[Rules and Regulations]
[Page 1161-1163]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr06ja05-1]
========================================================================
Rules and Regulations
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains regulatory documents
having general applicability and legal effect, most of which are keyed
to and codified in the Code of Federal Regulations, which is published
under 50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by the Superintendent of Documents.
Prices of new books are listed in the first FEDERAL REGISTER issue of each
week.
========================================================================
[[Page 1161]]
=======================================================================
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 25
[Docket No. NM298, Special Conditions No. 25-282-SC]
Special Conditions: Dassault-Breguet Model Falcon 10 Airplane;
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 a Dassault-Breguet
Model Falcon 10 airplane modified by Long Beach Avionics of Long Beach,
California. The modified airplane 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 a Collins Model ALI-80
Altimeter and Model MSI-80 Mach Airspeed Indicator. 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 December 23,
2004. Comments must be received on or before February 7, 2005.
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. NM298, 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. NM298. Comments may be inspected in
the Rules Docket weekdays, except Federal holidays, between 7:30 a.m.
and 4 p.m.
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:
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 airplane. 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 received.
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 October 11, 2004, Long Beach Avionics of Long Beach, California,
applied to the FAA, Los Angeles Aircraft Certification Office for a
supplemental type certificate (STC) to modify a Dassault-Breguet Model
Falcon 10 airplane. The proposed modification incorporates the
installation of a Collins Model ALI-80 Altimeter and a Model MSI-80
Mach Airspeed Indicator as primary instruments. These digital
instruments would perform critical functions, that is, functions whose
failure would prevent the continued safe flight and landing of the
airplane. The Altimeter and Mach Airspeed Indicator to be installed in
the 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, effective
September 16, 1991, Long Beach Avionics must show that the Model Falcon
10 airplane, as changed, continues 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 regulations incorporated by reference in Type Certificate No.
A33EU include 14 CFR part 25, as amended by Amendments 25-1 through 25-
20.
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 modified Dassault-Breguet Model
Falcon 10 airplane 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 Model Falcon 10
[[Page 1162]]
airplane 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.
Special conditions are initially applicable to the model for which
they are issued. Should Long Beach Avionics apply at a later date for a
supplemental type certificate to modify any other model included on the
same type certificate 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.
Novel or Unusual Design Features
The Dassault-Breguet Model Falcon 10 airplane modified by Long
Beach Avionics will incorporate new digital equipment 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-Breguet Model Falcon 10 airplane
modified by Long Beach Avionics. These special conditions require that
new digital equipment 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
indicated in the following table 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
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
------------------------------------------------------------------------
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 a
Dassault-Breguet Model Falcon 10 airplane modified by Long Beach
Avionics. Should Long Beach Avionics apply at a later date for a
supplemental type certificate to modify any other model included on
Type Certificate A33EU to incorporate the same or similar novel or
unusual design feature, these special conditions would apply to that
model as well as under the provisions of 14 CFR 21.101.
Conclusion
This action affects only certain design features on the Dassault-
Breguet Model Falcon 10 airplane modified by Long Beach Avionics. It is
not a rule of general applicability and affects only the applicant
which applied to the FAA for approval of these features on the
airplane.
The substance of the special conditions for this airplane 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 immediately. 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 certification basis for the modified Dassault-
Breguet Model Falcon 10 airplane:
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
[[Page 1163]]
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 December 23, 2004.
Kevin Mullin,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 05-236 Filed 1-5-05; 8:45 am]
BILLING CODE 4910-13-P