Special Conditions: Cessna Aircraft Company Model 501 and 551 Airplanes; High Intensity Radiated Fields (HIRF), 9903-9905 [06-1810]
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Federal Register / Vol. 71, No. 39 / Tuesday, February 28, 2006 / Rules and Regulations
consolidated assets of less than $500 million
if the holding company (i) is engaged in
significant nonbanking activities either
directly or through a nonbank subsidiary; (ii)
conducts significant off-balance sheet
activities (including securitization and asset
management or administration) either
directly or through a nonbank subsidiary; or
(iii) has a material amount of debt or equity
securities outstanding (other than trust
preferred securities) that are registered with
the Securities and Exchange Commission.
The Federal Reserve may apply the tier 1
leverage guidelines at its discretion to any
bank holding company, regardless of asset
size, if such action is warranted for
supervisory purposes.2
*
*
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2 [Reserved].
*
*
*
By order of the Board of Governors of the
Federal Reserve System, February 22, 2006.
Jennifer J. Johnson,
Secretary of the Board.
[FR Doc. 06–1837 Filed 2–27–06; 8:45 am]
BILLING CODE 6210–02–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 25
[Docket No. NM339; Special Conditions No.
25–313–SC]
Special Conditions: Cessna Aircraft
Company Model 501 and 551
Airplanes; High Intensity Radiated
Fields (HIRF)
Federal Aviation
Administration (FAA), DOT.
ACTION: Final special conditions; request
for comments.
sroberts on PROD1PC70 with RULES
AGENCY:
SUMMARY: These special conditions are
issued for Cessna Aircraft Company
Model 501 and 551 series airplanes
modified by Elliott Aviation Technical
Product Development, Inc. These
airplanes will have novel and unusual
design features when compared to the
state of technology envisioned in the
airworthiness standards for transport
category airplanes. The modification
incorporates the installation of
Universal Aviation Electronic Flight
Display Systems. 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.
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16:27 Feb 27, 2006
Jkt 208001
The effective date of these
special conditions is February 9, 2006.
Comments must be received on or
before March 30, 2006.
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.
NM339, 1601 Lind Avenue, SW.,
Renton, Washington, 98055–4056; or
delivered in duplicate to the Transport
Airplane Directorate at the above
address. Comments must be marked:
Docket No. NM339.
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:
DATES:
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 airplanes 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, we invite 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 in
light of the comments received.
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Fmt 4700
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9903
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 December 6, 2005, Elliott Aviation
Technical Product Development, Inc.,
Quad City Airport, P.O. Box 100,
Moline, Illinois 61266, applied for a
supplemental type certificate (STC) to
modify Cessna Aircraft Company Model
501 and 551 airplanes. These models are
currently approved under Type
Certificate No. A27CE. These Cessna
airplane models are small transport
category airplanes. The Cessna Model
501 and 551 series airplanes are
powered by turbine engines with a
maximum takeoff weight of 11,850
pounds (model 501) and 12,500 pounds
(model 551). These airplanes operate
with one-to two-pilot crews and seat up
to 9 passengers in Model 501 and up to
11 passengers in Model 551. The
modification incorporates the
installation of the Universal Avionics
Electronic Display Systems. The
avionics/electronics and electrical
systems installed in these airplanes
have the potential to be vulnerable to
high-intensity radiated fields (HIRF)
external to the airplanes.
Type Certification Basis
Under the provisions of 14 CFR
21.101, Elliott Aviation must show that
the Cessna Aircraft Company Model 501
and 551 series airplanes, as changed,
continue to meet the applicable
provisions of the regulations
incorporated by reference in Type
Certificate No. A27CE, 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 the Cessna Model 501 series
airplanes includes part 23 of 14 CFR
effective February 1, 1965, as amended
by amendments 23–1 through 23–16
except as follows: delete §§ 23.45
through 23.77, 23.831, 23.1091(c)(2),
23.1303, 23.1323, 23.1441 through
23.1449, 23.1581 through 23.1583(f),
and 23.1583(h) through 23.1587; and
add §§ 23.1385 as amended through
amendment 23–20; and add part 25 of
14 CFR effective February 1, 1965, as
amended by amendments 25–1 through
25–17; §§ 25.1195, 25.1199 and 25.1203
as amended by amendments 25–1
through 25–37; §§ 25.101 through
25.125, 25.831, 25.934, 25.1091(d)(2),
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sroberts on PROD1PC70 with RULES
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Federal Register / Vol. 71, No. 39 / Tuesday, February 28, 2006 / Rules and Regulations
25.1197, 25.1201, 25.1303,
25.1305(a)(7), 25.1323, 25.1439 through
25.1453, 25.1581 through 25.1583(c)(3),
and §§ 25.1583(e) through 25.1587.
The certification basis for the Cessna
Model 551 series airplanes includes part
23 of 14 CFR effective February 1, 1965,
as amended by amendments 23–1
through 23–16 except as follows: delete
§§ 23.21 through 23.31, 23.45 through
23.77, 23.157, 23.171 through 23.177,
23.251, 23.345, 23.351, 23.361, 23.471
through 23.511, 23.571, 23.572, 23.629,
23.679, 23.723 through 23.737, 23.773,
23.775, 23.777, 23.783, 23.807, 23.831,
23.903(c), 23.1091(c)(2), 23.1301,
23.1303, 23.1307, 23.1309, 23.1321,
23.1323, 23.1325, 23.1385(c), 23.1435,
23.1441 through 23.1449, 23.1581
through 23.1583(f), 23.1583(i) through
23.1587; and add §§ 23.1143(e) and
23.1385(c) as amended through
amendment 23–18 and 23.1301 and
23.1335 as amended through
amendment 23–20; and add from part
25 of 14 CFR effective February 1, 1965,
as amended by amendments 25–1
through 25–17, §§ 25.812, 25.863,
25.1195, 25.1199, 25.1203, 25.1309, and
25.1435; as amended by amendment 25–
1 through 25–37, §§ 25.21 through
25.31, 25.101 through 25.125,
25.147(c)(e), 25.171 through 25.177,
25.251, 25.305(c), 25.345, 25.351,
25.361, 25.471 through 25.511, 25.571,
25.573, 25.629, 25.679, 25.721 through
25.737, 25.773, 25.775, 25.777, 25.783,
25.807, 25.831, 25.851, 25.903(b)(d),
25.934, 25.1091(d)(2), 25.1189(g)(h),
25.1197, 25.1201, 25.1303,
25.1305(a)(7), 25.1305(c)(4), 25.1307,
25.1321, 25.1323, 25.1325, 25.1439
through 25.1453, 25.1581 through
25.1583(c)(3), 25.1583(f) through
25.1587, and §§ 25.901(c), 25.903(e)(3),
and 25.1351(d) as amended through
amendment 25–41.
In addition, the certification basis
includes certain later amended sections
of the applicable part 25 regulations 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 modified Cessna Aircraft
Company Model 501 and 551 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 Cessna Model 501 and
551 airplanes must comply with the fuel
vent and exhaust emission requirements
of 14 CFR part 34 and the noise
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16:27 Feb 27, 2006
Jkt 208001
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 Elliott Aviation
Technical Product Development, Inc.
apply at a later date for a supplemental
type certificate to modify any other
model included on Type Certificate No.
A27CE to incorporate the same 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 Cessna Aircraft
Company Model 501 and 551 series
airplanes modified by Elliott Aviation
will incorporate electronic displays
with Universal Aviation Electronic
Flight Display Systems that will perform
critical functions. These systems may be
vulnerable to high-intensity radiated
fields 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
electronic and electrical 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 Cessna Model 501 and 551
airplanes modified by Elliott Aviation.
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
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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 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 is shown with
either HIRF protection special condition
paragraph 1 or 2 below:
1. A minimum threat of 100 volts rms
(root-mean-square) per meter electric
field strength from 10 KHz to 18 GHz.
a. The threat must be applied to the
system elements and their associated
wiring harnesses without the benefit of
airframe shielding.
b. Demonstration of this level of
protection is established through system
tests and analysis.
2. A threat external to the airframe of
the field strengths identified in the table
below for the frequency ranges
indicated. Both peak and average field
strength components from the table are
to be demonstrated.
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 .......
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 modulatoin 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 the Cessna
Aircraft Company Model 501 and 551
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Federal Register / Vol. 71, No. 39 / Tuesday, February 28, 2006 / Rules and Regulations
series airplanes. Should Elliott Aviation
Technical Product Development apply
at a later date for a supplemental type
certificate to modify any other model
included on Type Certificate No.
A27CEU 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 the
Cessna Model 501 and 551 series
airplanes modified by Elliott Aviation
Technical Product Development. It is
not a rule of general applicability and
affects only the applicant who applied
to the FAA for approval of these features
on the airplane.
The substance of the special
conditions for these airplanes has been
subjected to the notice and comment
procedure in several prior instances and
has been derived without substantive
change from those previously issued.
Because a delay would significantly
affect the certification of the airplane,
which is imminent, the FAA has
determined that prior public notice and
comment are unnecessary and
impracticable, and good cause exists for
adopting these special conditions upon
issuance. The FAA is requesting
comments to allow interested persons to
submit views that may not have been
submitted in response to the prior
opportunities for comment described
above.
List of Subjects in 14 CFR Part 25
Aircraft, Aviation safety, Reporting
and recordkeeping requirements.
I The authority citation for these
special conditions is as follows:
sroberts on PROD1PC70 with RULES
Authority: 49 U.S.C. 106(g), 40113, 44701,
44702, 44704.
The Special Conditions
I 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 Cessna Aircraft
Company Model 501 and 551 airplanes
modified by Elliott Aviation Technical
Product Development, Inc.
1. Protection from Unwanted Effects
of High-Intensity Radiated Fields
(HIRF). Each electronic and electrical
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.
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16:27 Feb 27, 2006
Jkt 208001
2. For the purpose of these special
conditions, the following definition
applies: Critical Functions: Functions
whose failure would contribute to or
cause a failure condition that would
prevent the continued safe flight and
landing of the airplane.
Issued in Renton, Washington, on February
9, 2006.
Kalene C. Yanamura,
Acting Manager, Transport Airplane
Directorate, Aircraft Certification Service.
[FR Doc. 06–1810 Filed 2–27–06; 8:45 am]
BILLING CODE 4910–13–P
9905
Directorate at the address indicated
above. You must mark your comments:
Docket No. NM388. You can inspect
comments in the Rules Docket
weekdays, except Federal Holidays,
between 7:30 a.m. and 4 p.m.
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.
FOR FURTHER INFORMATION CONTACT:
SUPPLEMENTARY INFORMATION:
DEPARTMENT OF TRANSPORTATION
Comments Invited
Federal Aviation Administration
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, we invite interested
persons to take part in this rulemaking
by sending 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.
You may inspect the docket 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 by 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.
14 CFR Part 25
[Docket No. NM338, Special Conditions No.
25–312–SC]
Special Conditions: Raytheon Aircraft
Company Model BAe.125 Series 800A;
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 Raytheon Aircraft Company
Model BAe.125 Series 800A airplanes
modified by Duncan Aviation Inc. 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 the Honeywell Primus
Epic CDS/R Display System. The
applicable airworthiness regulations do
not contain adequate or appropriate
safety standards for protecting these
systems from the effects of highintensity radiated fields (HIRF). These
special conditions contain the
additional safety standards 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 February 9, 2006.
We must receive your comments by
March 30, 2006.
ADDRESSES: You must mail two copies
of your comments to: Federal Aviation
Administration, Transport Airplane
Directorate, Attention: Rules Docket
(ANM–113), Docket No. NM338, 1601
Lind Avenue SW., Renton, Washington
98055–4056. You may deliver two
copies to the Transport Airplane
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]]>Agencies
[Federal Register Volume 71, Number 39 (Tuesday, February 28, 2006)]
[Rules and Regulations]
[Pages 9903-9905]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 06-1810]
=======================================================================
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 25
[Docket No. NM339; Special Conditions No. 25-313-SC]
Special Conditions: Cessna Aircraft Company Model 501 and 551
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 Cessna Aircraft
Company Model 501 and 551 series airplanes modified by Elliott Aviation
Technical Product Development, Inc. These airplanes will have novel and
unusual design features when compared to the state of technology
envisioned in the airworthiness standards for transport category
airplanes. The modification incorporates the installation of Universal
Aviation Electronic Flight Display Systems. 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 February 9,
2006. Comments must be received on or before March 30, 2006.
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. NM339, 1601 Lind
Avenue, SW., Renton, Washington, 98055-4056; or delivered in duplicate
to the Transport Airplane Directorate at the above address. Comments
must be marked: Docket No. NM339.
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 of the airplanes 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, we invite 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 in light of 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 December 6, 2005, Elliott Aviation Technical Product
Development, Inc., Quad City Airport, P.O. Box 100, Moline, Illinois
61266, applied for a supplemental type certificate (STC) to modify
Cessna Aircraft Company Model 501 and 551 airplanes. These models are
currently approved under Type Certificate No. A27CE. These Cessna
airplane models are small transport category airplanes. The Cessna
Model 501 and 551 series airplanes are powered by turbine engines with
a maximum takeoff weight of 11,850 pounds (model 501) and 12,500 pounds
(model 551). These airplanes operate with one-to two-pilot crews and
seat up to 9 passengers in Model 501 and up to 11 passengers in Model
551. The modification incorporates the installation of the Universal
Avionics Electronic Display Systems. The avionics/electronics and
electrical systems installed in these airplanes have the potential to
be vulnerable to high-intensity radiated fields (HIRF) external to the
airplanes.
Type Certification Basis
Under the provisions of 14 CFR 21.101, Elliott Aviation must show
that the Cessna Aircraft Company Model 501 and 551 series airplanes, as
changed, continue to meet the applicable provisions of the regulations
incorporated by reference in Type Certificate No. A27CE, 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 the Cessna Model 501
series airplanes includes part 23 of 14 CFR effective February 1, 1965,
as amended by amendments 23-1 through 23-16 except as follows: delete
Sec. Sec. 23.45 through 23.77, 23.831, 23.1091(c)(2), 23.1303,
23.1323, 23.1441 through 23.1449, 23.1581 through 23.1583(f), and
23.1583(h) through 23.1587; and add Sec. Sec. 23.1385 as amended
through amendment 23-20; and add part 25 of 14 CFR effective February
1, 1965, as amended by amendments 25-1 through 25-17; Sec. Sec.
25.1195, 25.1199 and 25.1203 as amended by amendments 25-1 through 25-
37; Sec. Sec. 25.101 through 25.125, 25.831, 25.934, 25.1091(d)(2),
[[Page 9904]]
25.1197, 25.1201, 25.1303, 25.1305(a)(7), 25.1323, 25.1439 through
25.1453, 25.1581 through 25.1583(c)(3), and Sec. Sec. 25.1583(e)
through 25.1587.
The certification basis for the Cessna Model 551 series airplanes
includes part 23 of 14 CFR effective February 1, 1965, as amended by
amendments 23-1 through 23-16 except as follows: delete Sec. Sec.
23.21 through 23.31, 23.45 through 23.77, 23.157, 23.171 through
23.177, 23.251, 23.345, 23.351, 23.361, 23.471 through 23.511, 23.571,
23.572, 23.629, 23.679, 23.723 through 23.737, 23.773, 23.775, 23.777,
23.783, 23.807, 23.831, 23.903(c), 23.1091(c)(2), 23.1301, 23.1303,
23.1307, 23.1309, 23.1321, 23.1323, 23.1325, 23.1385(c), 23.1435,
23.1441 through 23.1449, 23.1581 through 23.1583(f), 23.1583(i) through
23.1587; and add Sec. Sec. 23.1143(e) and 23.1385(c) as amended
through amendment 23-18 and 23.1301 and 23.1335 as amended through
amendment 23-20; and add from part 25 of 14 CFR effective February 1,
1965, as amended by amendments 25-1 through 25-17, Sec. Sec. 25.812,
25.863, 25.1195, 25.1199, 25.1203, 25.1309, and 25.1435; as amended by
amendment 25-1 through 25-37, Sec. Sec. 25.21 through 25.31, 25.101
through 25.125, 25.147(c)(e), 25.171 through 25.177, 25.251, 25.305(c),
25.345, 25.351, 25.361, 25.471 through 25.511, 25.571, 25.573, 25.629,
25.679, 25.721 through 25.737, 25.773, 25.775, 25.777, 25.783, 25.807,
25.831, 25.851, 25.903(b)(d), 25.934, 25.1091(d)(2), 25.1189(g)(h),
25.1197, 25.1201, 25.1303, 25.1305(a)(7), 25.1305(c)(4), 25.1307,
25.1321, 25.1323, 25.1325, 25.1439 through 25.1453, 25.1581 through
25.1583(c)(3), 25.1583(f) through 25.1587, and Sec. Sec. 25.901(c),
25.903(e)(3), and 25.1351(d) as amended through amendment 25-41.
In addition, the certification basis includes certain later amended
sections of the applicable part 25 regulations 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 modified Cessna Aircraft Company Model
501 and 551 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 Cessna Model 501 and 551 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 Elliott Aviation Technical Product Development,
Inc. apply at a later date for a supplemental type certificate to
modify any other model included on Type Certificate No. A27CE to
incorporate the same 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 Cessna Aircraft Company Model 501 and 551
series airplanes modified by Elliott Aviation will incorporate
electronic displays with Universal Aviation Electronic Flight Display
Systems that will perform critical functions. These systems may be
vulnerable to high-intensity radiated fields 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 electronic and electrical 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 Cessna Model 501 and 551 airplanes
modified by Elliott Aviation. These special conditions require that new
avionics/electronics and electrical systems that perform critical
functions be designed and installed to preclude component damage and
interruption of function due to both the direct and indirect effects of
HIRF.
High-Intensity Radiated Fields (HIRF)
With the trend toward increased power levels from ground-based
transmitters, and the advent of space and satellite communications,
coupled with electronic command and control of the airplane, the
immunity of critical digital avionics/electronics and electrical
systems to HIRF must be established.
It is not possible to precisely define the HIRF to which the
airplane will be exposed in service. There is also uncertainty
concerning the effectiveness of airframe shielding for HIRF.
Furthermore, coupling of electromagnetic energy to cockpit-installed
equipment through the cockpit window apertures is undefined. Based on
surveys and analysis of existing HIRF emitters, an adequate level of
protection exists when compliance is shown with either HIRF protection
special condition paragraph 1 or 2 below:
1. A minimum threat of 100 volts rms (root-mean-square) per meter
electric field strength from 10 KHz to 18 GHz.
a. The threat must be applied to the system elements and their
associated wiring harnesses without the benefit of airframe shielding.
b. Demonstration of this level of protection is established through
system tests and analysis.
2. A threat external to the airframe of the field strengths
identified in the table below for the frequency ranges indicated. Both
peak and average field strength components from the table are to be
demonstrated.
------------------------------------------------------------------------
Field strength
(volts per meter)
Frequency ---------------------
Peak Average
------------------------------------------------------------------------
10 kHz-100 kHz.................................... 50 50
100 kHz-500 kHz................................... 50 50
500 kHz-2 MHz..................................... 50 50
2 MHz-30 MHz...................................... 100 100
30 MHz-70 MHz..................................... 50 50
70 MHz-100 MHz.................................... 50 50
100 MHz-200 MHz................................... 100 100
200 MHz-400 MHz................................... 100 100
400 MHz-700 MHz................................... 700 50
700 MHz-1 GHz..................................... 700 100
1 GHz-2 GHz....................................... 2000 200
2 GHz-4 GHz....................................... 3000 200
4 GHz-6 GHz....................................... 3000 200
6 GHz-8 GHz....................................... 1000 200
8 GHz-12 GHz...................................... 3000 300
12 GHz-18 GHz..................................... 2000 200
18 GHz-40 GHz..................................... 600 200
------------------------------------------------------------------------
The field strengths are expressed in terms of peak of the root-mean-
square (rms) over the complete modulatoin 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 the
Cessna Aircraft Company Model 501 and 551
[[Page 9905]]
series airplanes. Should Elliott Aviation Technical Product Development
apply at a later date for a supplemental type certificate to modify any
other model included on Type Certificate No. A27CEU to incorporate the
same or similar novel or unusual design feature, these special
conditions would apply to that model as well under the provisions of
Sec. 21.101.
Conclusion
This action affects only certain novel or unusual design features
on the Cessna Model 501 and 551 series airplanes modified by Elliott
Aviation Technical Product Development. It is not a rule of general
applicability and affects only the applicant who applied to the FAA for
approval of these features on the airplane.
The substance of the special conditions for these airplanes has
been subjected to the notice and comment procedure in several prior
instances and has been derived without substantive change from those
previously issued. Because a delay would significantly affect the
certification of the airplane, which is imminent, the FAA has
determined that prior public notice and comment are unnecessary and
impracticable, and good cause exists for adopting these special
conditions upon issuance. The FAA is requesting comments to allow
interested persons to submit views that may not have been submitted in
response to the prior opportunities for comment described above.
List of Subjects in 14 CFR Part 25
Aircraft, Aviation safety, Reporting and recordkeeping
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 Cessna Aircraft
Company Model 501 and 551 airplanes modified by Elliott Aviation
Technical Product Development, Inc.
1. Protection from Unwanted Effects of High-Intensity Radiated
Fields (HIRF). Each electronic and electrical system that performs
critical functions must be designed and installed to ensure that the
operation and operational capability of these systems to perform
critical functions are not adversely affected when the airplane is
exposed to high intensity radiated fields.
2. For the purpose of these special conditions, the following
definition applies: Critical Functions: Functions whose failure would
contribute to or cause a failure condition that would prevent the
continued safe flight and landing of the airplane.
Issued in Renton, Washington, on February 9, 2006.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 06-1810 Filed 2-27-06; 8:45 am]
BILLING CODE 4910-13-P
