[Federal Register Volume 67, Number 208 (Monday, October 28, 2002)]
[Rules and Regulations]
[Pages 65692-65695]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 02-27379]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 25

[Docket No. NM232; Special Conditions No. 25-221-SC]


Special Conditions: Avions Marcel Dassault-Breguet Aviation (AMD/
BA) Model Falcon 10 Series AirPlanes; High-Intensity Radiated Fields 
(HIRF)

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final special conditions; request for comments.

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SUMMARY: These special conditions are issued for Avions Marcel 
Dassault-Breguet Aviation Model Falcon 10 series airplanes modified by 
Garrett Aviation Services. These airplanes, as modified, 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 
dual Innovative Solutions & Support Air Data Display Units (ADDU) with 
the IS&S Air

[[Page 65693]]

Data Sensor and an analog interface unit (AIU) 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 October 15, 
2002. Comments must be received on or before November 27, 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. NM232, 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. NM232. 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:

FAA's Determination as to Need for Public Process

    The FAA has determined that notice and opportunity for prior public 
comment are unnecessary in accordance with 14 CFR 11.38, because the 
FAA has provided previous opportunities to comment on substantially 
identical special conditions and has fully considered and addressed all 
the substantive comments received. Based on a review of the comment 
history and the comment resolution, the FAA is satisfied that new 
comments are unlikely. 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 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 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 August 22, 2002, Garrett Aviation Services, 1200 North Airport 
Drive, Capital Airport, Springfield, IL 62707, applied for a 
supplemental type certificate (STC) to modify Avions Marcel Dassault-
Breguet Aviation Model Falcon 10 series airplanes approved under Type 
Certificate No. A33EU. The Avions Marcel Dassault-Breguet Aviation 
Model Falcon 10 series airplane is a small category airplane powered by 
two Airesearch Manufacturing Company TFE731-2-1C turbofan engines and 
having 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 Innovative Solutions & 
Support Air Data Display Units (ADDU) and an analog interface unit 
(AIU). The ADDU replaces the existing analog flight instrumentation and 
provides additional functional capability and redundancy in the system. 
The AIU is a digital-to-analog adapter used to adapt signals driving 
the existing Sperry Flight Guidance Computer. 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 Avions 
Marcel Dassault-Breguet Aviation Model Falcon 10 series airplanes, as 
changed, continue 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. Subsequent changes have been made to Sec.  21.101 as part of 
Amendment 21-77, but those changes do not become effective until June 
10, 2003. The regulations incorporated by reference in the type 
certificate are commonly referred to as the ``original type 
certification basis.'' The original type certification basis for the 
modified Avions Marcel Dassault-Breguet Aviation Model Falcon 10 series 
airplanes includes 14 CFR part 25 as amended by Amendments 25-1 through 
25-20, dated February 1, 1964, 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, 14 CFR part 25, as amended) do not contain 
adequate or appropriate safety standards for the Avions Marcel 
Dassault-Breguet Aviation Model Falcon 10 series airplanes because of 
novel or unusual design features, special conditions are prescribed 
under the provisions of Sec.  21.16.
    In addition to the applicable airworthiness regulations and special 
conditions, the Avions Marcel Dassault-Breguet Aviation Model Falcon 10 
series airplanes must comply with the fuel vent and exhaust emission 
requirements of 14 CFR part 34 and the noise certification requirement 
of part 36, including Amendment 36-1.
    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).
    Special conditions are initially applicable to the model for which 
they are issued. 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 also apply to the other 
model under the provisions of 14 CFR 21.101(a)(1).

Novel or Unusual Design Features

    The Avions Marcel Dassault-Breguet Aviation Model Falcon 10 series 
airplanes modified by Garrett Aviation Services will incorporate 
systems comprised of dual Air Data Display Units and an analog 
interface unit that will perform critical functions. These systems have 
the potential to be vulnerable to high-intensity radiated

[[Page 65694]]

fields (HIRF) external to the airplane. The current airworthiness 
standards (14 CFR 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 that is equivalent to 
that intended by the regulations incorporated by reference, special 
conditions are needed for Avions Marcel Dassault-Breguet Aviation Model 
Falcon 10 series airplanes 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, plus 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 in accordance 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 table below for the frequency ranges indicated. Both 
peak and average field strength components from the table below 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 kHz-2 MHz...............................          50          50
2 MHz-30 MHz....................................         100         100
30 MHz-70.......................................          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......................................         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 
Avions Marcel Dassault-Breguet Aviation Model Falcon 10 series 
airplanes 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)(1).

Conclusion

    This action affects only certain novel or unusual design features 
on the Avions Marcel Dassault-Breguet Aviation Model Falcon 10 series 
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. It is 
unlikely that prior public comment would result in a significant change 
from the substance contained herein. For this reason, and because a 
delay would significantly affect the certification of the airplane, 
which is imminent, the FAA has determined that prior public notice and 
comment are unnecessary and impracticable, and good cause exists for 
adopting these special conditions 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 Avions Marcel 
Dassault-Breguet Aviation Model Falcon 10 series 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 15, 2002.
Ali Bahrami,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 02-27379 Filed 10-25-02; 8:45 am]
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