[Federal Register Volume 61, Number 157 (Tuesday, August 13, 1996)]
[Rules and Regulations]
[Pages 41949-41951]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 96-20628]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 25
[Docket No. NM-129; Special Conditions No. 25-ANM -119]
Special Conditions: Modified Avions Marcel Dassault--Breguet
Aviation Mystere-Falcon Model Fan Jet Falcon (Basic), Fan Jet Falcon
Series D, E, and Mystere-Falcon 20-C5, 20-D5 and 20-E5 Airplanes; High
Intensity Radiated Fields (HIRF)
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final special conditions; request for comments.
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SUMMARY: These special conditions are issued for the Avions Marcel
Dassault--Breguet Aviation Mystere-Falcon Model Fan Jet Falcon (Basic),
Fan Jet Falcon Series D, E, and Mystere-Falcon 20-C5, 20-D5 and 20-E5
airplanes modified by Rockwell Collins of Cedar Rapids, Iowa. These
airplanes will be equipped with a digital Electronic Flight Instrument
System (EFIS) that will perform critical functions. The applicable
regulations do not contain adequate or appropriate safety standards for
the protection of the EFIS from the effects of high-intensity radiated
fields (HIRF). These special conditions provide the additional safety
standards that the Administrator considers necessary to ensure that the
critical functions performed by this system are maintained when the
airplane is exposed to HIRF.
DATES: The effective date of these special conditions is August 6,
1996. Comments must be received on or before September 27, 1996.
ADDRESSES: Comments on these final special conditions, request for
comments, may be mailed in duplicate to: Federal Aviation
Administration, Office of the Assistant Chief Counsel, Attn: Rules
Docket (ANM-7), Docket No. NM-129, 1601 Lind Avenue SW.,
[[Page 41950]]
Renton, Washington, 98055-4056; or delivered in duplicate to the Office
of the Assistant Chief Counsel at the above address. Comments must be
marked ``Docket No. NM-129.'' Comments may be inspected in the Rules
Docket weekdays, except Federal holidays, between 7:30 a.m. and 4:00
p.m.
FOR FURTHER INFORMATION CONTACT:
Mark Quam, FAA, Standardization Branch, Transport Airplane Directorate,
Aircraft Certification Service, 1601 Lind Avenue SW., Renton,
Washington 98055-4056; telephone (206) 227-2145.
SUPPLEMENTARY INFORMATION:
Comments Invited
The FAA has determined that good cause exists for making these
special conditions effective upon issuance; however, interested persons
are invited to submit such written data, views, or arguments as they
may desire. Communications should identify the regulatory docket and
special conditions number and be submitted in duplicate to the address
specified above. All communications received on or before the closing
date for comments will be considered by the Administrator. These
special conditions may be changed in light of the comments received.
All comments submitted will be available in the Rules Docket for
examination by interested persons, both before and after the closing
date for comments. A report summarizing each substantive public contact
with FAA personnel concerning this rulemaking will be filed in the
docket. Persons wishing the FAA to acknowledge receipt of their
comments submitted in response to this request must submit with those
comments a self-addressed, stamped postcard on which the following
statement is made: ``Comments to Docket No. NM-129.'' The postcard will
be date stamped and returned to the commenter.
Background
On January 16, 1996, Rockwell Collins of Cedar Rapids, Iowa,
applied for an amendment to a supplemental type certificate to modify
the Avopms Marcel Dassault--Breguet Aviation Mystere-Falcon Model Fan
Jet Falcon (Basic), Fan Jet Falcon Series D, E, and Mystere-Falcon 20-
C5, 20-D5 and 20-E5 airplanes. The proposed amendment adds EFIS-86C(14)
(Electronic Flight Instrument System) applicability for the above
listed airplanes. The EFIS displays required flight critical
information and critical functions. The installation of the EFIS system
displaying critical functions is potentially vulnerable to high-
intensity radiated fields (HIRF) external to the airplane.
Supplemental Type Certification Basis
Under the provisions of Sec. 21.101 of the Federal Aviation
Regulations (FAR), Rockwell Collins, must show that the altered Avions
Marcel Dassault--Breguet Aviation Mystere-Falcon Model Fan Jet Falcon
(Basic), Fan Jet Falcon Series D, E, and Mystere-Falcon 20-C5, 20-D5
and 20-E5 airplanes 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 the following for the Model Fan Jet Falcon (Basic), Fan
Jet Falcon Series D, E, and Mystere-Falcon 20-C5, 20-D5 and 20-E5
airplanes: Civil Aviation Regulations (CAR) 4b dated December 31, 1953,
including Amendments 4b-1 through 4b-12 and Special Regulation SR422B.
In addition, under Sec. 21.101(b)(1), the following sections of the FAR
apply to the EFIS installation: Secs. 25.1301(d), 25.1303 and 25.1322,
as amended by Amendment 25-38; and Secs. 25.1309, 25.1321 (a) (b) (d),
and (e), 25.1331, 25.1333, and 25.1335, as amended by Amendment 25-41.
These special conditions will form an additional part of the
supplemental type certification basis.
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 Fan Jet Falcon (Basic), Fan Jet Falcon Series D, E, and
Mystere-Falcon 20-C5, 20-D5 and 20-E5 airplane 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
Sec. 11.49 of the FAR after public notice, as required by Secs. 11.28
and 11.29, 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 the applicant apply for a supplemental type
certificate to modify any other model included on the same type
certificate to incorporate the same novel or unusual design feature,
the special conditions would also apply to the other model under the
provisions of Sec. 21.101(a)(1).
Discussion
There is no specific regulation that addresses protection
requirements for electrical and electronic systems from high-intensity
radiated fields (HIRF). Increased power levels from ground-based radio
transmitters, and the growing use of sensitive electrical and
electronic 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 modified Model Fan Jet Falcon (Basic),
Fan Jet Falcon Series D, E, and Mystere-Falcon 20-C5, 20-D5 and 20-E5
airplanes that would require that the EFIS be designed and installed to
preclude component damage and interruption of function due to the
effects of HIRF.
High-Intensity Radiated Fields (HIRF)
With the trend toward increased power levels from ground-based
transmitters, plus the advent of space and satellite communications,
coupled with electronic command and control of the airplane, the
immunity of critical digital avionics systems, such as the EFIS, to
HIRF must be established.
It is not possible to precisely define the HIRF to which the
airplanes 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 paragraphs 1 or 2 below:
1. A minimum threat of 100 volts per meter peak 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
systems tests and analysis.
2. A threat external to the airframe of the following field
strengths for the frequency ranges indicated:
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Peak (V/ Average
Frequency M) (V/M)
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10 KHz-100 KHz...................................... 50 50
[[Page 41951]]
100 KHz-500 KHz..................................... 60 60
500 KHz-2000 KHz.................................... 70 70
2 MHz-30 MHz........................................ 200 200
30 MHz-70 MHz....................................... 30 30
70 MHz-100 MHz...................................... 30 30
100 MHz-200 MHz..................................... 150 33
200 MHz-400 MHz..................................... 70 70
400 MHz-700 MHz..................................... 4,020 935
700 MHz-1000 MHz.................................... 1,700 170
1 GHz-2 GHz......................................... 5,000 990
2 GHz-4 GHz......................................... 6,680 840
4 GHz-6 GHz......................................... 6,850 310
6 GHz-8 GHz......................................... 3,600 670
8 GHz-12 GHz........................................ 3,500 1,270
12 GHz-18 GHz....................................... 3,500 360
18 GHz-40 GHz....................................... 2,100 750
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As discussed above, these special conditions are applicable to the
Avions Marcel Dassault--Breguet Aviation Model Fan Jet Falcon (Basic),
Fan Jet Falcon Series D, E, and Mystere-Falcon 20-C5, 20-D5 and 20-E5
airplane, modified by Rockwell Collins. Should Rockwell Collins 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
novel or unusual design feature, the special conditions would apply to
that model as well, under the provisions of Sec. 21.101(a)(1).
Conclusion
This action affects only certain unusual or novel design features
on Avions Marcel Dassault--Breguet Aviation Model Fan Jet Falcon
(Basic), Fan Jet Falcon Series D, E, and Mystere-Falcon 20-C5, 20-D5
and 20-E5 airplanes modified by Rockwell Collins. It is not a rule of
general applicability and affects only the applicant who applied to the
FAA for approval of this feature on this 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. It is
unlikely that prior public comment would result in a significant change
from the substance contained herein. For this reason, and 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. Therefore, these special
conditions are being made effective 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.
The authority citation for these special conditions is as follows:
Authority: 49 U.S.C. app. 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; and 49 U.S.C. (106)(g).
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 Avions Marcel
Dassault--Bruguet Aviation Model Fan Jet Falcon (Basic), Fan Jet Falcon
Series D, E, and Mystere-Falcon 20-C5, 20-D5 and 20-E5 airplane, as
modified by Rockwell Collins.
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 external to the airplane.
2. The following definition applies with respect to this special
condition:
Critical Function. 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 6, 1996.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service, ANM-100.
[FR Doc. 96-20628 Filed 8-12-96; 8:45 am]
BILLING CODE 4910-13-M
