Source: https://www.federalregister.gov/documents/2001/09/27/01-24219/special-conditions-dassault-aviation-mystere-falcon-50-high-intensity-radiated-fields-hirf
Timestamp: 2020-05-26 18:25:46
Document Index: 681999107

Matched Legal Cases: ['art 25', '§\u200925', '§\u200925', '§\u200925', 'art 25', '§\u200921', 'art 34', 'art 36', '§\u200911', '§\u200921', 'art 25', '§\u200921']

Federal Register :: Special Conditions: Dassault Aviation Mystere-Falcon 50; High-Intensity Radiated Fields (HIRF)
Special Conditions: Dassault Aviation Mystere-Falcon 50; High-Intensity Radiated Fields (HIRF)
A Rule by the Federal Aviation Administration on 09/27/2001
The effective date of these special conditions is September 7, 2001. Comments must be received on or before October 29, 2001.
66 FR 49271
49271-49273 (3 pages)
Docket No. NM196
Special Conditions No. 25-185-SC
01-24219
https://www.federalregister.gov/d/01-24219 https://www.federalregister.gov/d/01-24219
These special conditions are issued for Dassault Aviation Mystere-Falcon 50 airplanes modified by ElectroSonics. 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 dual Electronic Primary Flight Display systems 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.
Comments on these special conditions may be mailed in duplicate to: Federal Aviation Administration, Transport Airplane Directorate, Attention: Rules Docket (ANM-113), Docket No. NM196, 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. NM196. Comments may be inspected in the Rules Docket weekdays, except Federal holidays, between 7:30 a.m. and 4 p.m.
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 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 Start Printed Page 49272special conditions effective upon issuance.
Interested persons are invited to submit such written data, views, or arguments as they may desire. Communications should identify the rules docket number and be submitted in duplicate to the address specified above. The Administrator will consider all communications received on or before the closing date for comments. The special conditions may be changed in light of the comments received. All comments received will be available in the Rules Docket for examination by interested persons, both before and after the closing date for comments. A report summarizing each substantive public contact with FAA personnel concerning this rulemaking will be filed in the docket. Persons wishing the FAA to acknowledge receipt of their comments submitted in response to these special conditions must include with those comments a self-addressed, stamped postcard on which the following statement is made: “Comments to Docket No. NM196.” The postcard will be date stamped and returned to the commenter.
On July 3, 2001, ElectroSonics, 4391 International Gateway, Columbus, Ohio, applied for a Supplemental Type Certificate (STC) to modify Dassault Aviation Mystere-Falcon 50 airplanes. The Dassault Aviation Mystere-Falcon 50 is a small transport category airplane. The Dassault Aviation Mystere-Falcon 50 airplanes are powered by three AlliedSignal Model TFE 731-3-1C Turbofan Engines with a maximum takeoff weight of 38,800 pounds. This aircraft operates with a 2-pilot crew and can hold up to 19 passengers. The modification incorporates the installation of a Rockwell Collins FDS-2000 Flight Display System. The FDS-2000 is a replacement for the existing Analog Flight Instrumentation, while also providing additional functional capability and redundancy in the 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.
Under the provisions of 14 CFR 21.101, ElectroSonics 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 regulations included in the certification basis for the Dassault Aviation Mystere-Falcon 50 airplanes include 14 CFR part 25, dated February 1, 1965, as amended by amendment 25-1 through amendment 25-34; § 25.255, as amended by amendment 25-42; §§ 25.979(d) and (e), as amended by amendment 25-38; 25.1013(b)(1) as amended by amendment 25-36; § 25.1351(d), as amended by amendment 25-41; 25.1353(c)(6), as amended by amendment 25-42; Special Conditions No. 25-86-EU-24 dated March 6, 1979.
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 Dassault Aviation Mystere-Falcon 50 airplanes modified by ElectroSonics 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, these 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 part 36.
Special conditions, as defined in § 11.19, are issued in accordance with 11.38 and become part of the airplane's type certification basis in accordance with § 21.101(b)(2).
As noted earlier, the Dassault Aviation Mystere-Falcon 50 airplanes modified by ElectroSonics will incorporate dual Electronic Primary 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.
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 Dassault Aviation Mystere-Falcon 50 airplanes modified by ElectroSonics. 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.
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.Start Printed Page 49273
As discussed above, these special conditions are applicable to Dassault Aviation Mystere-Falcon 50 airplanes modified by ElectroSonics. Should ElectroSonics 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 § 21.101(a)(1).
This action affects only certain design features on the Dassault Aviation Mystere-Falcon 50 airplanes modified by ElectroSonics. 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.
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 ElectroSonics.
[FR Doc. 01-24219 Filed 9-26-01; 8:45 am]