[Federal Register Volume 67, Number 52 (Monday, March 18, 2002)]
[Rules and Regulations]
[Pages 11889-11891]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 02-6365]



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  Federal Register / Vol. 67, No. 52 / Monday, March 18, 2002 / Rules 
and Regulations  

[[Page 11889]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 25

[Docket No. NM214, Special Conditions No. 25-198-SC]


Special Conditions: Dassault Aviation Fan Jet Falcon, Fan Jet 
Falcon Series C, D, E, and F, and Mystere-Falcon 20-C5, 20-D5, 20-E5, 
and 20-F5 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 Fan 
Jet Falcon, Fan Jet Falcon Series C, D, E, and F, and Mystere-Falcon 
20-C5, 20-D5, 20-E5, and 20-F5 airplanes modified by Garrett Aviation 
Services. 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 dual Electronic Primary 
Flight Display systems and dual Electronic Primary Attitude Source 
systems that perform critical functions. These special conditions 
contain the additional safety standards that the Administrator 
considers necessary to establish a level of safety equivalent to that 
provided by the existing airworthiness standards.

DATES: The effective date of these special conditions is March 6, 2002. 
Comments must be received on or before April 17, 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. NM214 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. NM214. 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: The FAA has determined that notice and 
opportunity for prior public comment hereon are impracticable because 
these procedures would significantly delay certification of the 
airplane and thus delivery of the affected airplanes. The FAA therefore 
finds that good cause exists for making these special conditions 
effective upon issuance.

Comments Invited

    The FAA invites interested persons to participate in this 
rulemaking by submitting written comments, data, or views. The most 
helpful comments reference a specific portion of the special 
conditions, explain the reason for any recommended change, and include 
supporting data. We ask that you send us two copies of written 
comments.
    We will file in the docket all comments we receive, as well as a 
report summarizing each substantive public contact with FAA personnel 
concerning these special conditions. The docket is available for public 
inspection before and after the comment closing date. If you wish to 
review the docket in person, go to the address in the ADDRESSES section 
of this preamble between 9:00 a.m. and 5:00 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 in light of the comments we receive.
    If you want the FAA to acknowledge receipt of your comments on this 
final action, 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 to you.

Background

    On January 10, 2002, Garrett Aviation Services, 1200 North Airport 
Drive--Capital Airport, Springfield, IL 62707, applied for a 
supplemental type certificate (STC) to modify Dassault Aviation Fan Jet 
Falcon, Fan Jet Falcon Series C, D, E, and F, and Mystere-Falcon 20-C5, 
20-D5, 20-E5, and 20-F5 airplanes approved under Type Certificate No. 
A7EU. The Dassault Aviation Fan Jet Falcon, Fan Jet Falcon Series C, D, 
E, and F, and Mystere-Falcon 20-C5, 20-D5, 20-E5, and 20-F5 are small 
transport category airplanes powered by two turbofan engines, with a 
maximum takeoff weight of 29,000 pounds. These airplanes operate with a 
2-pilot crew and can hold up to 10 passengers. The modification 
incorporates the installation of a Rockwell Collins ProLine 21 Display 
System, consisting of dual Electronic Primary Flight Display systems 
which replace the existing Primary Flight Display systems, and a 
Rockwell Collins Attitude Heading Reference System, consisting of dual 
Electronic Primary Attitude Source systems. These systems 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, Garrett Aviation Services 
must show that the Dassault Aviation Fan Jet Falcon, Fan Jet Falcon 
Series C, D, E, and F, and Mystere-Falcon 20-C5, 20-D5, 20-E5, and 20-
F5 airplanes, as changed, continue to meet the applicable provisions of 
the regulations incorporated by reference in Type Certificate No. A7EU, 
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 
Dassault Aviation Fan Jet Falcon, Fan Jet Falcon Series C, D, E, and F, 
and Mystere-Falcon 20-C5, 20-D5, 20-E5, and 20-F5 airplanes includes 
CAR 4b, dated December 1953, through Amendment 4b-12 and SR422B; and 14 
CFR part 25, dated

[[Page 11890]]

February 1, 1965, through Amendment 25-41, except for special 
conditions and exceptions noted in Type Certificate Data Sheet (TCDS) 
A7EU.
    If the Administrator finds that the applicable airworthiness 
regulations (i.e., CAR 4b and 14 CFR part 25, as amended) do not 
contain adequate or appropriate safety standards for the Dassault 
Aviation Fan Jet Falcon, Fan Jet Falcon Series C, D, E, and F, and 
Mystere-Falcon 20-C5, 20-D5, 20-E5, and 20-F5 airplanes because of 
novel or unusual design features, special conditions are prescribed 
under the provisions of Sec. 21.16.
    Special conditions, as defined in Sec. 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 design change approval to modify any other model already 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).

Novel or Unusual Design Features

    As noted earlier, the Dassault Aviation Fan Jet Falcon, Fan Jet 
Falcon Series C, D, E, and F, and Mystere-Falcon 20-C5, 20-D5, 20-E5, 
and 20-F5 airplanes modified by Garrett Aviation Services will 
incorporate dual Electronic Primary Flight Display systems and dual 
Electronic Primary Attitude Source systems that will perform critical 
functions. The existing 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, these 
systems are considered to be novel or unusual design features.

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 Fan Jet Falcon, Fan Jet 
Falcon Series C, D, E, and F, and Mystere-Falcon 20-C5, 20-D5, 20-E5, 
and 20-F5 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 digital avionics/electronics and electrical 
systems to HIRF must be established.
    It is not possible to precisely define the HIRF to which the 
airplane will be exposed in service. There is also uncertainty 
concerning the effectiveness of airframe shielding for HIRF. 
Furthermore, coupling of electromagnetic energy to cockpit-installed 
equipment through the cockpit window apertures is undefined. Based on 
surveys and analysis of existing HIRF emitters, an adequate level of 
protection exists when compliance with the HIRF protection special 
condition is shown with either paragraph 1 or 2 below:
    1. A minimum threat of 100 volts rms (root-mean-square) per meter 
electric field strength from 10 KHz to 18 GHz.
    a. The threat must be applied to the system elements and their 
associated wiring harnesses without the benefit of airframe shielding.
    b. Demonstration of this level of protection is established through 
system tests and analysis.
    2. A threat external to the airframe of the field strengths 
indicated in the following table for the frequency ranges indicated. 
Both peak and average field strength components from the table are to 
be demonstrated.

------------------------------------------------------------------------
                                                       Field strength
                                                      (volts per meter)
                     Frequency                     ---------------------
                                                       Peak     Average
------------------------------------------------------------------------
10 kHz-100 kHz....................................         50         50
100 kHz-500 kHz...................................         50         50
500 kHz-2 MHz.....................................         50         50
2 MHz-30 MHz......................................        100        100
30 MHz-70 MHz.....................................         50         50
70 MHz-100 MHz....................................         50         50
100 MHz-200 MHz...................................        100        100
200 MHz-400 MHz...................................        100        100
400 MHz-700 MHz...................................        700         50
700 MHz-1 GHz.....................................        700        100
1 GHz-2 GHz.......................................       2000        200
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 Fan Jet Falcon, Fan Jet Falcon Series C, D, E, and F, 
and Mystere-Falcon 20-C5, 20-D5, 20-E5, and 20-F5 airplanes modified by 
Garrett Aviation Services. Should Garrett Aviation Services apply at a 
later date for design change approval 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 design features on Dassault 
Aviation Fan Jet Falcon, Fan Jet Falcon Series C, D, E, and F, and 
Mystere-Falcon 20-C5, 20-D5, 20-E5, and 20-F5 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 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 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.

[[Page 11891]]

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 type certification basis for Dassault Aviation Fan Jet Falcon, Fan 
Jet Falcon Series C, D, E, and F, and Mystere-Falcon 20-C5, 20-D5, 20-
E5, and 20-F5 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 March 6, 2002.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 02-6365 Filed 3-15-02; 8:45 am]
BILLING CODE 4910-13-P