Source: https://www.federalregister.gov/documents/2002/10/25/02-27171/special-conditions-bombardier-model-cl-600-1a11-and-cl-600-2a12-airplanes-high-intensity-radiated
Timestamp: 2018-02-17 20:23:28
Document Index: 499978915

Matched Legal Cases: ['§\u200921', 'art 25', 'art 25', '§\u200921', '§\u200921', 'art 25', '§\u200921']

Federal Register :: Special Conditions: Bombardier Model CL-600-1A11 and CL-600-2A12 Airplanes; High-Intensity Radiated Fields (HIRF)
Special Conditions: Bombardier Model CL-600-1A11 and CL-600-2A12 Airplanes; High-Intensity Radiated Fields (HIRF)
67 FR 65475
65475-65477 (3 pages)
Docket No. NM236
Special Conditions No. 25-220-SC
02-27171
https://www.federalregister.gov/d/02-27171 https://www.federalregister.gov/d/02-27171
These special conditions are issued for Bombardier Model CL-600-1A11 and CL-600-2A12 airplanes modified by Gulfstream Aerospace Corporation. 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 a Rockwell Collins FDS-2000 Electronic Display System that performs critical functions. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for the protection of this system 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. NM236, 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. NM236. Comments may be inspected in the Rules Docket weekdays, except Federal holidays, between 7:30 a.m. and 4 p.m.
Connie Beane, FAA, Standardization Branch, ANM-113, Transport Airplane Directorate, Aircraft Certification Service, 1601 Lind Avenue SW., Renton, Washington 98055-4056; telephone (425) 227-2796; facsimile (425) 227-1100.
On July 31, 2002, Gulfstream Aerospace Corporation, Dallas, Texas, applied for a supplemental type certificate (STC) to modify Bombardier Model CL-600-1A11 and CL-600-2A12 airplanes. These airplanes are low-wing, pressurized transport category airplanes with two fuselage-mounted jet engines. They are capable of seating a maximum of 19 passengers, depending upon the configuration. The modification incorporates the installation of a Rockwell Collins FDS-2000 five “tube” Electronic Display System consisting of the following major components:
Five (5) AFD-2000A Adaptive Flight Displays: Pilot Electronic Attitude Indicator (EADI), Pilot Electronic Horizontal Situation Indicator (EHSI), Multi-Function Display (MFD), Copilot EADI, Copilot EHSI.
Three (3) DCP-2000 Display Control Panels: Pilot, MFD, Copilot.
Two (2) DCU-2000 Data Concentrator Units.
This system has a potential to be vulnerable to high-intensity radiated fields (HIRF) external to the airplane.
Under the provisions of 14 CFR 21.101, Amendment 21-69, effective September 16, 1991, Gulfstream Aerospace Corporation must show that Bombardier Model CL-600-1A11 and CL-600-2A12 airplanes, as modified to include installation of the Rockwell Collins FDS-2000 Electronic Display System, continue to meet the applicable provisions of the regulations incorporated by reference in Type Certificate No. A21EA or the applicable regulations in effect on the date of application for the change. Subsequent changes have been made to § 21.101 as Start Printed Page 65476part 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 specific regulations included in the certification basis for Bombardier Model CL-600-1A11 and CL-600—A12 airplanes include 14 CFR part 25, dated February 1, 1965, including amendments 25-1 through 25-37, and sections 25.675(a), 25.685(a), 25.733(c), 25.775(e), 25.787(c), 25.815, 25.841(b), 25.951(a), 25.979(d) and (e), 25.1041, 25.1143(e), 25.1303(a), 25.1322, 25.1385(c), 25.1557(b), and 25.1583(a) of Amendment 25-38; sections 25.901(b) and (c), 25.903(c) and (e), 25.933(a), 25.943, 25.959, 25.1091(a) and (d), 25.1145(c), 25.1199(b) and (c), 25.1207, 25.1549, and 25.1585(a)(9) of Amendment 25-40; and section 25.1309 of Amendment 25-41; section 25.1353(c) of Amendment 25-42; section 25.571 and 25.629(d)(4)(v) of Amendment 25-45; and sections 25.351 and 25.603 of Amendment 25-46.
If the Administrator finds that the applicable airworthiness regulations (i.e., 14 CFR part 25, as amended) do not contain adequate or appropriate safety standards for the Bombardier Model CL-600-1A11 and CL-600-2A12 airplanes because of a novel or unusual design feature, special conditions are prescribed under the provisions of § 21.16.
Special conditions are initially applicable to the model for which they are issued. Should Gulfstream Aerospace Corporation 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 § 21.101(a)(1), Amendment 21-69, effective September 16, 1991.
As noted earlier, Bombardier Model CL-600-1A11 and CL-600-2A12 airplanes modified by Gulfstream Aerospace Corporation will incorporate the Rockwell Collins FDS-2000 Electronic Display System that will perform critical functions. This system may be vulnerable to high-intensity radiated fields external to the airplane. The current airworthiness standards of part 25 do not contain safety standards adequate or appropriate to protect this equipment from the adverse effects of HIRF. Accordingly, this system is considered to be a novel or unusual design feature.
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 such protection.
To ensure that a level of safety is achieved that is equivalent to that intended by the regulations which are incorporated by reference, special conditions are needed for Bombardier Model CL-600-1A11 and CL-600-2A12 airplanes modified by Gulfstream Aerospace Corporation. These special conditions will require that the Rockwell Collins FDS-2000 Electronic Display System, which perform critical functions, be designed and installed to preclude component damage and interruption of function due to the direct and indirect effects of HIRF.
1. A minimum threat of 100 volts rms (root mean square) per meter electric field strength from 10 KHz to 18 GHz.
1GHz-2 GHz 2000 200
Applicability: As discussed above, these special conditions are applicable to Bombardier Model CL-600-1A11 and CL-600-2A12 airplanes modified by Gulfstream Aerospace Corporation to incorporate the Rockwell Collins FDS-2000 Electronic Display System. Should Gulfstream Aerospace Corporation apply at a later date for a supplemental type certificate to modify any other model included on Type Certificate A21EA 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), Amendment 21-69, effective September 16, 1991.
This action affects only certain design features on Bombardier Model CL-600-1A11 and CL-600-A12 airplanes modified by Gulfstream Aerospace Corporation to incorporate a Rockwell Collins FDS-2000 Electronic Display System. It is not a rule of general applicability and affects only the applicant which applied to the FAA for approval of these features on the airplanes. Start Printed Page 65477
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 Bombardier Model CL-600-1A11 and CL-600-2A12 airplanes as modified by Gulfstream Aerospace Corporation.
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 external to the airplane.
2. For the purpose of these special conditions, the following definition applies: Critical Functions: Functions whose failure would contribute to or cause a failure that would prevent the continued safe flight and landing of the airplane.
[FR Doc. 02-27171 Filed 10-24-02; 8:45 am]