Source: https://www.federalregister.gov/documents/2000/10/23/00-27181/special-conditions-canadair-model-cl-600-2b19-series-airplanes-high-intensity-radiated-fields-hirf
Timestamp: 2018-04-21 06:50:26
Document Index: 641446846

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

Federal Register :: Special Conditions: Canadair Model CL-600-2B19 Series Airplanes; High-Intensity Radiated Fields (HIRF).
Special Conditions: Canadair Model CL-600-2B19 Series Airplanes; High-Intensity Radiated Fields (HIRF).
The effective date of these special conditions is October 17, 2000. Comments must be received on or before November 22, 2000.
63196-63198 (3 pages)
Docket No. NM177
https://www.federalregister.gov/d/00-27181 https://www.federalregister.gov/d/00-27181
These special conditions are issued for Canadair Model CL-600-2B19 series airplanes modified by Rockwell Collins Flight Dynamics. 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 new Head-Up Guidance System (HGS). The HGS will utilize electrical and electronic systems that perform 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-114), Docket No. NM177, 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. NM177. Comments may be inspected in the Rules Docket weekdays, except Federal holidays, between 7:30 a.m. and 4:00 p.m.
Gerald Lakin, FAA, Standardization Branch, ANM-113, Transport Airplane Directorate, Aircraft Certification Service, 1601 Lind Avenue SW., Renton, Washington 98055-4056; telephone (425) 227-1187; facsimile (425) 227-1149.
The FAA has determined that good cause exists for making these special conditions effective upon issuance; however, interested persons are invited to submit such written data, views, or arguments, as they may desire. Communications should identify the regulatory docket number and be submitted in duplicate to the address specified above. All communications received on or before the closing date for comments will be considered by the Administrator. These 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. Commenters wishing the FAA to acknowledge receipt of their comments submitted in response to these special conditions must include a self-addressed, stamped postcard on which the following statement is made: “Comments to Docket No. NM177.” The postcard will be date stamped and returned to the commenter.
On June 26, 2000, Rockwell Collins Flight Dynamics, 16600 S.W. 72nd Avenue, Portland, OR 97224, applied for a Supplemental Type Certificate (STC) for Canadair Model CL-600-2B19 series airplanes. The Model CL-600-2B19 is a Model Regional Jet Series 100 passsenger airplane with two AVCO Lycoming ALF-502L or ALF-502L-2 engines. These airplanes will incorporate a Head-Up Guidance System (HGS), manufactured by Rockwell Collins Flight Dynamics, which displays attitude and heading information. Start Printed Page 63197
The HGS performs critical functions associated with the display of attitude and heading information to the pilot. These functions can be susceptible to disruption of both command and response signals as a result of electrical and magnetic interference caused by high-intensity radiated fields (HIRF) external to the airplane. This disruption of signals could result in loss of critical flight displays and annunciations, or could present misleading information to the pilot.
Under the provisions of 14 CFR 21.101, Rockwell Collins Flight Dynamics must show that the Model CL-600-2B19 series airplanes, as changed, 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. 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 Model CL-600-2B19 series airplanes include Title 14, Code of Federal Regulations (14 CFR) part 25, as amended by Amendments 25-1 through 25-62, plus additional requirements listed in the type certificate data sheet that are not relevant to these special conditions.
If the Administrator finds that the applicable airworthiness regulations (i.e., part 25, as amended) do not contain adequate or appropriate safety standards for the Model CL-600-2B19 series airplanes 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, the Model CL-600-2B19 series airplanes must comply with the fuel vent and exhaust emission requirements of part 34 and the noise certification requirements of part 36.
As stated earlier, the Model CL-600-2B19 series airplanes modified by Rockwell Collins Flight Dynamics will incorporate a HGS system, which performs critical functions. The HGS system contains electronic equipment for which 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. This system may be vulnerable to HIRF external to the airplane. 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 Model CL-600-2B19 airplanes modified to include the Rockwell Collins Flight Dynamics HGS system. These special conditions will require that this system, which performs critical functions, be designed and installed to preclude component damage and interruption of function due to both the direct and indirect effects of HIRF.
As discussed above, these special conditions are applicable to Canadair Model CL-600-2B19 series airplanes modified by Rockwell Collins Flight Dynamics to include the Rockwell Collins Flight Dynamics HGS system. Should Rockwell Collins Flight Dynamics 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 features, these special conditions would apply to that model as well under the provisions of § 21.101(a)(1).
This action affects only certain novel or unusual design features on Canadair Model CL-600-2B19 series airplanes modified by Rockwell Collins Flight Dynamics. 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 airplanes.
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 Canadair Model CL-600-2B19 series airplanes modified by Rockwell Collins Flight Dynamics.
[FR Doc. 00-27181 Filed 10-20-00; 8:45 am]