Special Conditions: Dassault-Breguet Model Falcon 10 Airplane; High Intensity Radiated Fields (HIRF), 1161-1163 [05-236]
Download as PDF
<![CDATA[
1161
Rules and Regulations
Federal Register
Vol. 70, No. 4
Thursday, January 6, 2005
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.
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)
Federal Aviation
Administration (FAA) DOT.
ACTION: Final special conditions; request
for comments.
AGENCY:
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 highintensity 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.,
VerDate jul<14>2003
18:52 Jan 05, 2005
Jkt 205001
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.
PO 00000
Frm 00001
Fmt 4700
Sfmt 4700
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 DassaultBreguet Model Falcon 10 airplane
because of a novel or unusual design
feature, special conditions are
prescribed under the provisions of
§ 21.16.
In addition to the applicable
airworthiness regulations and special
conditions, the Model Falcon 10
E:\FR\FM\06JAR1.SGM
06JAR1
1162
Federal Register / Vol. 70, No. 4 / Thursday, January 6, 2005 / Rules and Regulations
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 § 11.38 and become part of the type
certification basis in accordance with
§ 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 § 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
VerDate jul<14>2003
18:52 Jan 05, 2005
Jkt 205001
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 cockpitinstalled 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.
Frequency
Field strength
(volts per meter)
Peak
10 kHz–100 kHz ...
100 kHz–500 kHz
500 kHz–2 MHz ....
2 MHz–30 MHz .....
30 MHz–70 MHz ...
70 MHz–100 MHz
100 MHz–200 MHz
200 MHz–400 MHz
400 MHz–700 MHz
700 MHz–1 GHz ...
1 GHz–2 GHz .......
2GHz–4 GHz ........
4 GHz–6 GHz .......
6 GHz–8 GHz .......
8 GHz–12 GHz .....
12 GHz–18 GHz ...
18 GHz–40 GHz ...
50
50
50
100
50
50
100
100
700
700
2000
3000
3000
1000
3000
2000
600
Average
50
50
50
100
50
50
100
100
50
100
200
200
200
200
300
200
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 DassaultBreguet Model Falcon 10 airplane
modified by Long Beach Avionics.
PO 00000
Frm 00002
Fmt 4700
Sfmt 4700
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.
The authority citation for these special
conditions is as follows:
I
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 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
I
E:\FR\FM\06JAR1.SGM
06JAR1
Federal Register / Vol. 70, No. 4 / Thursday, January 6, 2005 / Rules and Regulations
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
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 25
[Docket No. NM287; Special Conditions No.
25–281–SC]
Special Conditions: Airbus Model
A330, A340–200 and A340–300 Series
Airplanes; Lower Deck Mobile Crew
Rest (LD–MCR) Compartment
Federal Aviation
Administration (FAA), DOT.
ACTION: Final special conditions.
AGENCY:
SUMMARY: These special conditions are
issued for the Airbus Model A330,
A340–200, and A340–300 series
airplanes. These airplanes will have
novel or unusual design features
associated with a lower deck mobile
crew rest (LD–MCR) compartment. The
applicable airworthiness regulations do
not contain adequate or appropriate
safety standards for this design feature.
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.
EFFECTIVE DATE: December 23, 2004.
FOR FURTHER INFORMATION CONTACT: Tim
Backman, FAA, International Branch,
ANM–116, Transport Airplane
Directorate, Aircraft Certification
Service, 1601 Lind Avenue SW.,
Renton, Washington, 98055–4056;
telephone (425) 227–2797; facsimile
(425) 227–1149.
SUPPLEMENTARY INFORMATION:
Background
On March 20, 2003, Airbus applied
for a change to Type Certificate
Numbers A46NM and A43NM to permit
installation of an LD–MCR compartment
in Airbus Model A330, A340–200, and
A340–300 series airplanes.
The LD–MCR compartment will be
located under the passenger cabin floor
in the aft cargo compartment of Airbus
VerDate jul<14>2003
18:52 Jan 05, 2005
Jkt 205001
Model A330, A340–200, and A340–300
series airplanes. It will be the size of a
standard airfreight container and will be
removable from the cargo compartment.
The LD–MCR compartment will be
occupied in flight but not during taxi,
takeoff, or landing. No more than seven
crewmembers at a time will be
permitted to occupy it. The LD–MCR
compartment will have a smoke
detection system, a fire suppression
system, and an oxygen system.
The LD–MCR compartment will be
accessed from the main deck via a
‘‘stairhouse.’’ The floor within the
stairhouse has a hatch that leads to
stairs which occupants use to descend
into the LD–MCR compartment. An
interface will keep this hatch open
when the stairhouse door is open. In
addition, there will be an emergency
hatch which opens directly into the
main passenger cabin. The LD–MCR
compartment has a maintenance door.
This door is intended to be used to
allow maintenance personnel and cargo
handlers to enter the LD–MCR from the
cargo compartment when the airplane is
not in flight.
Type Certification Basis
Under the provisions of § 21.101,
Airbus must show that Airbus Model
A330, A340–200, and A340–300 series
airplanes, as changed, continue to meet
(1) the applicable provisions of the
regulations incorporated by reference in
A46NM (for Airbus Model A330) and in
A43NM (for Airbus Model A340–200
and A340–300 series airplanes) or (2)
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 A46NM
and A43NM are as follows:
The certification basis for Airbus
Models A330–300, A340–200, and
A340–300 series airplanes is 14 CFR
part 25, as amended by Amendments
25–1 through 25–63; certain regulations
at later Amendments 25–65, 25–66, and
25–77; and Amendment 25–64 with
exceptions. Refer to Type Certificate
Data Sheet (TCDS) A46NM or A43NM,
as applicable, for a complete description
of the certification basis for these
models, including certain special
conditions that are not relevant to these
proposed special conditions.
The certification basis for Airbus
Model A330–200 series airplanes is 14
CFR part 25, as amended by
Amendments 25–1 through 25–63, 25–
65, 25–66, 25–68, 25–69, 25–73, 25–75,
25–77, 25–78, 25–81, 25–82, 25–84 and
25–85; certain regulations at
PO 00000
Frm 00003
Fmt 4700
Sfmt 4700
1163
Amendments 25–72 and 25–74; and
Amendment 25–64 with exceptions.
Refer to TCDS A46NM for a complete
description of the certification basis for
that model, including certain special
conditions that are not relevant to these
proposed special conditions.
If the Administrator finds that the
applicable airworthiness regulations
(i.e., 14 CFR part 25) do not contain
adequate or appropriate safety standards
for Airbus Model A330, A340–200, and
A340–300 series airplanes because of a
novel or unusual design feature, special
conditions are prescribed under the
provisions of § 21.16.
In addition to the applicable
airworthiness regulations and special
conditions, Airbus Model A330, A340–
200, and A340–300 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
§ 11.19, are issued in accordance with
§ 11.38 and become part of the type
certification basis in accordance with
§ 21.101.
Special conditions are initially
applicable to the model for which they
are issued. Should the type certificate
for that model be amended later to
include any other model that
incorporates the same or similar novel
or unusual design feature, or should any
other model already included on the
same type certificate be modified to
incorporate the same or similar novel or
unusual design feature, the special
conditions would also apply to the other
model under the provisions of § 21.101.
Novel or Unusual Design Features
While the installation of a crew rest
compartment is not a new concept for
large transport category airplanes, each
crew rest compartment has unique
features based on design, location, and
use on the airplane. The LD–MCR
compartment is novel in terms of part
25 in that it will be located below the
passenger cabin floor in the aft cargo
compartment of Airbus Model A330,
A340–200, and A340–300 series
airplanes. Due to the novel or unusual
features associated with the installation
of a LD–MCR compartment, special
conditions are considered necessary to
provide a level of safety equal to that
established by the airworthiness
regulations incorporated by reference in
the type certificates of these airplanes.
These special conditions do not negate
the need to address other applicable
part 25 regulations.
E:\FR\FM\06JAR1.SGM
06JAR1
]]>Agencies
[Federal Register Volume 70, Number 4 (Thursday, January 6, 2005)]
[Rules and Regulations]
[Pages 1161-1163]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 05-236]
========================================================================
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.
========================================================================
Federal Register / Vol. 70, No. 4 / Thursday, January 6, 2005 / Rules
and Regulations
[[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
