Special Conditions: Dassault-Aviation Mystere-Falcon 50 Airplanes; High-Intensity Radiated Fields (HIRF), 57730-57732 [05-19860]
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57730
Federal Register / Vol. 70, No. 191 / Tuesday, October 4, 2005 / Rules and Regulations
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 ...........
2 GHz–4 GHz ...........
4 GHz–6 GHz ...........
6 GHz–8 GHz ...........
8 GHz–12 GHz .........
12 GHz–18 GHz .......
18 GHz–40 GHz .......
Average
50
50
50
100
50
50
100
100
700
700
2000
3000
3000
1000
3000
2000
600
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 Raytheon
Model BH125 Series 400A and 600A
airplanes, modified by Flight Test
Associates, Inc. Should Flight Test
Associates, Inc., apply at a later date for
a change to the type certificate to
include another model incorporating the
same 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 Raytheon Model BH125
Series 400A and 600A airplanes
modified by Flight Test Associates, Inc.
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
VerDate Aug<31>2005
16:33 Oct 03, 2005
Jkt 208002
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:
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 Raytheon Model BH125
Series 400A and 600A airplanes,
modified by Flight Test Associates, Inc.:
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.
Kalene C. Yanamura,
Acting Manager, Transport Airplane
Directorate, Aircraft Certification Service.
[FR Doc. 05–19859 Filed 10–3–05; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 25
[Docket No. NM329; Special Conditions No.
25–300–SC]
Special Conditions: Dassault-Aviation
Mystere-Falcon 50 Airplanes; HighIntensity Radiated Fields (HIRF)
Federal Aviation
Administration (FAA), DOT.
ACTION: Final special conditions; request
for comments.
AGENCY:
PO 00000
Frm 00006
Fmt 4700
Sfmt 4700
SUMMARY: These special conditions are
issued for Dassault-Aviation MystereFalcon 50 airplanes modified by
Premier Air Center. These modified
airplanes will have a novel or unusual
design feature when compared to the
state of technology envisioned in the
airworthiness standards for transport
category airplanes. The modification
incorporates the installation of
Universal Avionics EFI–890 Electronic
Flight Displays and Rockwell Collins
AHS–3000A Attitude Heading
Reference Systems (AHRS) that perform
critical functions. 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 established by the
existing airworthiness standards.
DATES: The effective date of these
special conditions is September 23,
2005. Comments must be received on or
before November 3, 2005.
ADDRESSES: Comments on these special
conditions may be mailed in duplicate
to: Federal Aviation Administration,
Transport Airplane Directorate,
Attention: Rules Docket (ANM–113),
Docket No. NM329, 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. NM329.
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
E:\FR\FM\04OCR1.SGM
04OCR1
Federal Register / Vol. 70, No. 191 / Tuesday, October 4, 2005 / Rules and Regulations
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 4:00 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 May 26, 2005, Premier Air Center,
18 Terminal Drive, East Alton, Illinois,
62024, applied for a supplemental type
certificate (STC) to modify DassaultAviation Mystere-Falcon 50 airplanes.
This model is currently approved under
Type Certificate No. A46EU. The
Dassault-Aviation Mystere-Falcon 50
airplanes are transport category
airplanes powered by three Allied
Signal TFE–731–3–1C turbine engines
with maximum takeoff weights of up to
40,780 pounds. These airplanes operate
with a 2-pilot crew and can seat up to
19 passengers. The modification
incorporates the installation of
Universal Avionics EFI–890 Electronic
Flight Displays and Rockwell Collins
AHS–3000A Attitude Heading
Reference Systems (AHRS). These
systems perform critical functions
whose failure would prevent the
continued safe flight and landing of the
airplane. The display and attitude
systems that will 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, Premier Air Center must show
that the Dassault-Aviation MystereFalcon 50 airplanes, as changed,
VerDate Aug<31>2005
16:33 Oct 03, 2005
Jkt 208002
continue to meet the applicable
provisions of the regulations
incorporated by reference in Type
Certificate No. A46EU, 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 certification
basis for Dassault-Aviation MystereFalcon 50 airplanes includes applicable
sections of 14 CFR part 25 as amended
by Amendment 25–1 through
Amendment 25–34, Special Conditions
No. 25–86–EU–24, and SFAR 27 as
amended by Amendment 27–1. In
addition, the certification basis includes
certain special conditions, exemptions,
equivalent levels of safety, or later
amended sections of the applicable part
25 that are not relevant to these special
conditions.
If the Administrator finds that the
applicable airworthiness regulations
(i.e., part 25, as amended) do not
contain adequate or appropriate safety
standards for Dassault-Aviation
Mystere-Falcon 50 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, the Dassault-Aviation
Mystere-Falcon 50 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 § 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 Premier Air Center
apply at a later date for a STC to modify
any other model included on Type
Certificate No. A46EU 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
As noted earlier, the DassaultAviation Mystere-Falcon 50 airplanes
modified by Premier Air Center will
incorporate Universal Avionics EFI–809
Electronic Flight Displays and Rockwell
Collins AHS–3000A AHRS that will
perform critical functions. These
systems may be vulnerable to highintensity radiated fields (HIRF) external
to the airplane. The current
airworthiness standards of part 25 do
not contain adequate or appropriate
PO 00000
Frm 00007
Fmt 4700
Sfmt 4700
57731
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-Aviation MystereFalcon 50 airplanes modified by
Premier Air Center. 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
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 identified in the table
below for the frequency ranges
indicated. Both peak and average field
E:\FR\FM\04OCR1.SGM
04OCR1
57732
Federal Register / Vol. 70, No. 191 / Tuesday, October 4, 2005 / Rules and Regulations
Field strength
(volts per meter)
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.
Peak
List of Subjects in 14 CFR Part 25
strength components from the table are
to be demonstrated.
Frequency
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 ...............
2 GHz–4 GHz ...............
4 GHz–6 GHz ...............
6 GHz–8 GHz ...............
8 GHz–12 GHz .............
12 GHz–18 GHz ...........
18 GHz–40 GHz ...........
Average
50
50
50
100
50
50
100
100
700
700
2000
3000
3000
1000
3000
2000
600
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 DassaultAviation Mystere-Falcon 50 airplanes
modified by Premier Air Center. Should
Premier Air Center apply at a later date
for a STC to modify any other model
included on Type Certificate No. A46EU
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 § 21.101.
Conclusion
This action affects only certain novel
or unusual design features on DassaultAviation Mystere-Falcon 50 airplanes
modified by Premier Air Center. 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
VerDate Aug<31>2005
16:33 Oct 03, 2005
Jkt 208002
Aircraft, Aviation safety, Reporting
and recordkeeping requirements.
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-Aviation Mystere-Falcon
50 airplanes modified by Premier Air
Center.
1. Protection from Unwanted Effects
of 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.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. 05–19860 Filed 10–3–05; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2005–22539; Directorate
Identifier 2004–NM–08–AD; Amendment 39–
14300; AD 2005–20–07]
RIN 2120–AA64
Airworthiness Directives; Airbus Model
A330–300 Series Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Final rule; request for
comments.
AGENCY:
SUMMARY: The FAA adopts a new
airworthiness directive (AD) for certain
PO 00000
Frm 00008
Fmt 4700
Sfmt 4700
Airbus Model A330–300 series
airplanes. This AD requires reinforcing
the structure of the center fuselage by
installing external stiffeners (butt straps)
at frame (FR) 53.3 on the fuselage skin
between left-hand and right-hand
stringer 13, and related investigative
actions. This AD results from a report
that, during fatigue tests of the fuselage,
cracks initiated and grew at the
circumferential joint of FR53.3. We are
issuing this AD to prevent fatigue
cracking of the fuselage, which could
result in reduced structural integrity of
the fuselage.
DATES: Effective October 19, 2005.
The Director of the Federal Register
approved the incorporation by reference
of a certain publication listed in the AD
as of October 19, 2005.
We must receive comments on this
AD by December 5, 2005.
ADDRESSES: Use one of the following
addresses to submit comments on this
AD.
• DOT Docket web site: Go to
https://dms.dot.gov and follow the
instructions for sending your comments
electronically.
• Government-wide rulemaking web
site: Go to https://www.regulations.gov
and follow the instructions for sending
your comments electronically.
• Mail: Docket Management Facility;
U.S. Department of Transportation, 400
Seventh Street SW., Nassif Building,
room PL–401, Washington, DC 20590.
• Fax: (202) 493–2251.
• Hand Delivery: Room PL–401 on
the plaza level of the Nassif Building,
400 Seventh Street SW., Washington,
DC, between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
Contact Airbus, 1 Rond Point Maurice
Bellonte, 31707 Blagnac Cedex, France,
for service information identified in this
AD.
FOR FURTHER INFORMATION CONTACT: Tim
Backman, Aerospace Engineer, ANM–
116, International Branch, FAA,
Transport Airplane Directorate, 1601
Lind Avenue, SW., Renton, Washington
98055–4056; telephone (425) 227–2797;
fax (425) 227–1149.
SUPPLEMENTARY INFORMATION:
Comments Invited
Although this is a final rule that was
not preceded by notice and an
opportunity for public comment, we
invite you to submit any relevant
written data, views, or arguments
regarding this AD. Include ‘‘Docket No.
FAA–2005–22539; Directorate Identifier
2004–NM–08–AD’’ at the beginning of
your comments. We specifically invite
comments on the overall regulatory,
economic, environmental, and energy
E:\FR\FM\04OCR1.SGM
04OCR1
]]>Agencies
[Federal Register Volume 70, Number 191 (Tuesday, October 4, 2005)]
[Rules and Regulations]
[Pages 57730-57732]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 05-19860]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 25
[Docket No. NM329; Special Conditions No. 25-300-SC]
Special Conditions: Dassault-Aviation Mystere-Falcon 50
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-Aviation
Mystere-Falcon 50 airplanes modified by Premier Air Center. These
modified airplanes will have a novel or unusual design feature when
compared to the state of technology envisioned in the airworthiness
standards for transport category airplanes. The modification
incorporates the installation of Universal Avionics EFI-890 Electronic
Flight Displays and Rockwell Collins AHS-3000A Attitude Heading
Reference Systems (AHRS) that perform critical functions. 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 established by the existing airworthiness standards.
DATES: The effective date of these special conditions is September 23,
2005. Comments must be received on or before November 3, 2005.
ADDRESSES: Comments on these special conditions may be mailed in
duplicate to: Federal Aviation Administration, Transport Airplane
Directorate, Attention: Rules Docket (ANM-113), Docket No. NM329, 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. NM329.
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
[[Page 57731]]
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 4:00 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 May 26, 2005, Premier Air Center, 18 Terminal Drive, East Alton,
Illinois, 62024, applied for a supplemental type certificate (STC) to
modify Dassault-Aviation Mystere-Falcon 50 airplanes. This model is
currently approved under Type Certificate No. A46EU. The Dassault-
Aviation Mystere-Falcon 50 airplanes are transport category airplanes
powered by three Allied Signal TFE-731-3-1C turbine engines with
maximum takeoff weights of up to 40,780 pounds. These airplanes operate
with a 2-pilot crew and can seat up to 19 passengers. The modification
incorporates the installation of Universal Avionics EFI-890 Electronic
Flight Displays and Rockwell Collins AHS-3000A Attitude Heading
Reference Systems (AHRS). These systems perform critical functions
whose failure would prevent the continued safe flight and landing of
the airplane. The display and attitude systems that will 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, Premier Air Center must show
that the Dassault-Aviation Mystere-Falcon 50 airplanes, as changed,
continue to meet the applicable provisions of the regulations
incorporated by reference in Type Certificate No. A46EU, 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 certification basis for Dassault-Aviation
Mystere-Falcon 50 airplanes includes applicable sections of 14 CFR part
25 as amended by Amendment 25-1 through Amendment 25-34, Special
Conditions No. 25-86-EU-24, and SFAR 27 as amended by Amendment 27-1.
In addition, the certification basis includes certain special
conditions, exemptions, equivalent levels of safety, or later amended
sections of the applicable part 25 that are not relevant to these
special conditions.
If the Administrator finds that the applicable airworthiness
regulations (i.e., part 25, as amended) do not contain adequate or
appropriate safety standards for Dassault-Aviation Mystere-Falcon 50
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-Aviation Mystere-Falcon 50 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.
Special conditions are initially applicable to the model for which
they are issued. Should Premier Air Center apply at a later date for a
STC to modify any other model included on Type Certificate No. A46EU 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
As noted earlier, the Dassault-Aviation Mystere-Falcon 50 airplanes
modified by Premier Air Center will incorporate Universal Avionics EFI-
809 Electronic Flight Displays and Rockwell Collins AHS-3000A AHRS that
will perform critical functions. These systems may be vulnerable to
high-intensity radiated fields (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-Aviation Mystere-Falcon 50
airplanes modified by Premier Air Center. 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 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 table below for the frequency ranges indicated. Both
peak and average field
[[Page 57732]]
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-Aviation Mystere-Falcon 50 airplanes modified by Premier Air
Center. Should Premier Air Center apply at a later date for a STC to
modify any other model included on Type Certificate No. A46EU 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 Dassault-Aviation Mystere-Falcon 50 airplanes modified by Premier
Air Center. 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 recordkeeping
requirements.
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-Aviation
Mystere-Falcon 50 airplanes modified by Premier Air Center.
1. Protection from Unwanted Effects of 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.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 05-19860 Filed 10-3-05; 8:45 am]
BILLING CODE 4910-13-P
