[Federal Register Volume 67, Number 207 (Friday, October 25, 2002)]
[Rules and Regulations]
[Pages 65473-65475]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 02-27175]



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  Federal Register / Vol. 67, No. 207 / Friday, October 25, 2002 / 
Rules and Regulations  

[[Page 65473]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 25

[Docket No. NM234; Special Conditions No. 25-218-SC]


Special Conditions: Avions Marcel Dassault--Breguet Aviation, 
Falcon 10; 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 the Avions Marcel 
Dassault--Breguet Aviation Falcon 10 airplane modified by Garrett 
Aviation Services. This modified airplane 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 a Universal Avionics EFI-
550 Flat Panel Flight Display System that performs 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 October 11, 
2002. Comments must be received on or before November 25, 2002.

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. NM234, 1601 Lind 
Avenue SW., Renton Washington, 98055-4056; or delivered in duplicate to 
the Transport Directorate at the above address. All comments must be 
marked: Docket No. NM234. 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: Meghan Gordon, FAA, Standardization 
Branch, ANM-113, Transport Airplane Directorate, Aircraft Certification 
Service, 1601 Lind Avenue SW., Renton, Washington 98055-4056; telephone 
(425) 227-2138; facsimile (425) 227-1149.

SUPPLEMENTARY INFORMATION:

Comments Invited

    The FAA has determined that notice and opportunity for prior public 
comment hereon is impracticable, because these procedures would 
significantly delay certification of the airplane, which is imminent. 
In addition, as 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 such written comments, data, or views, as 
they may desire. The most helpful commits 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 commit 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 we receive.
    If you want the FAA to acknowledge receipt of your comments on this 
proposal, 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 September 6, 2002, Garrett Aviation Services, 1200 North Airport 
Drive, Capital Airport Springfield, IL 62707, applied for a 
Supplemental Type Certificate (STC) to modify the Avions Marcel 
Dassault--Breguet Aviation Falcon 10 airplane approved under Type 
Certificate No. A33EU. The AMD/BA Falcon 10 is a transport category 
airplane. The AMD/BA Falcon 10 airplane is powered by two Airesearch 
Manufacturing Company TFE731-2-1C turbofans with a maximum takeoff 
weight of 18,300 pounds. This airplane operates with a 2-pilot crew and 
can hold up to 9 passengers. The modification incorporates the 
installation of dual Universal Avionics EFI-550 Flat Panel Flight 
Displays. The EFI-550 Display System is installed as a replacement for 
the existing mechanical ADI and HSI display instruments, while also 
providing additional functional capability and redundancy. The EFI-550 
Display System is microprocessor based digital, flat panel display 
which adapts analog input signals to digital information when 
interfaced with the existing flight director and flight guidance 
system. The avionics/electronics and electrical systems 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, Amendment 21-69, effective 
September 16, 1991, Garrett Aviation Services must show that the AMD/BA 
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 certification basis for the 
modified AMD/BA Falcon

[[Page 65474]]

10 airplane includes 14 CFR part 25, dated February 1, 1964, as amended 
by Amendments 25-1 through 25-20, except for special conditions and 
exceptions noted in Type Certificate Data Sheet (TDCS) A33EU.
    If the Administrator finds that the applicable airworthiness 
regulations (that is, part 25, as amended) do not contain adequate or 
appropriate safety standards for the AMD/BA Falcon 10 airplane because 
of novel or unusual design features, special conditions are prescribed 
under the provisions Sec.  21.16
    In addition to the applicable airworthiness regulations and special 
conditions, the AMD/BA Falcon 10 airplane must comply with the noise 
certification requirement 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(b)(2), Amendment 21-69, effective 
September 16, 1991.
    Special conditions are initially applicable to the model for which 
they are issued. Should Garrett Aviation Services apply for a 
supplemental type certificate to modify any other model included on the 
same type certificate to incorporate the same novel or unusual design 
feature, these special conditions would also apply to the other model 
under the provisions of Sec.  21.101(a)(1), Amendment 21-69, effective 
September 16, 1991.

Novel or Unusual Design Features

    As noted earlier, the AMD/BA Falcon 10 airplane modified by Garrett 
Aviation Services will incorporate Universal Avionics EFI-550 Flat 
Panel Flight Displays that will perform critical functions. These 
systems have to potential to be vulnerable to HIRF external to the 
airplane. The current airworthiness standards of part 25 do not contain 
adequate or appropriate safety standards that address the protection of 
this equipment from the adverse effect 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 that is equivalent to 
that intended by the regulations incorporated by reference, special 
conditions are needed for the AMD/BA Falcon 10 airplane modified by 
Garrett Aviation Services. 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 10KHz to 18GHz.
    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 following field 
strengths 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 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 the AMD/BA Falcon 10 airplane modified by Garret Aviation 
Services. Should Garrett Aviation Services 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 novel or unusual design 
feature, these special conditions would apply to that model as well 
under the provisions of Sec.  21.101(a)(2), Amendment 21-69, effective 
September 16, 1991.

Conclusion

    This action affects only certain novel or unusual design features 
on the AMD/BA Falcon 10 airplanes modified by Garrett Aviation 
Services. 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 period 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 that 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. 3

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.

[[Page 65475]]

The Special Conditions

    Accordingly, pursuant to the authority delegated to me by the 
Administrator, the following special conditions are issued as part of 
the supplemental type certification basis for the Avions Marcel 
Dassault--Breguet Aviation, Falcon 10 airplanes modified by Garrett 
Aviation Services.
    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 on October 11, 2002.
Ali Bahrami,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 02-27175 Filed 10-24-02; 8:45 am]
BILLING CODE 4910-13-P