Source: https://www.federalregister.gov/documents/2007/04/23/E7-7699/special-conditions-mcdonnell-douglas-models-dc-10-10-10-15-10-30-10-30f-10-40-and-10-40f-airplanes
Timestamp: 2018-08-21 10:51:16
Document Index: 95204297

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

Federal Register :: Special Conditions: McDonnell Douglas Models DC-10-10, 10-15, 10-30, 10-30F, 10-40, and 10-40F Airplanes; High-Intensity Radiated Fields (HIRF)
Special Conditions: McDonnell Douglas Models DC-10-10, 10-15, 10-30, 10-30F, 10-40, and 10-40F Airplanes; High-Intensity Radiated Fields (HIRF)
The effective date of these special conditions is April 16, 2007. We must receive your comments on or before May 23, 2007.
Docket No. NM376
Special Conditions No. 25-352-SC
https://www.federalregister.gov/d/E7-7699 https://www.federalregister.gov/d/E7-7699
Start Preamble Start Printed Page 20029
The FAA issues these special conditions for McDonnell Douglas Models DC-10-10, 10-15, 10-30, 10-30F, 10-40, and 10-40F airplanes modified by Canard Aerospace Corporation. These modified airplanes will have novel or unusual design features when compared with the state of technology envisioned in the airworthiness standards for transport category airplanes. The modification consists of installing electronic flight and engine instrument systems. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for protecting these systems from 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.
You may mail or deliver comments on these special conditions in duplicate to: Federal Aviation Administration, Transport Airplane Directorate, Attention: Rules Docket (ANM-113), Docket No. NM376, 1601 Lind Avenue SW., Renton, Washington 98057-3356. You must mark your comments Docket No. NM376.
Greg Dunn, FAA, Airplane and Flight Crew Interface Branch, ANM-111, Transport Airplane Directorate, Aircraft Certification Service, 1601 Lind Avenue SW, Renton, Washington 98057-3356; telephone (425) 227-2799; facsimile (425) 227-1320.
On October 24, 2006, Canard Aerospace Corporation, 250 South Fuller Street, Shakopee, Minnesota, 55379, applied for a supplemental type certificate (STC) to modify McDonnell Douglas Models DC-10-10, 10-15, 10-30, 10-30F, 10-40, and 10-40F airplanes. The McDonnell Douglas Model DC-10 airplanes are powered by three turbofan engines, with maximum takeoff weights of up to 590,000 pounds. These airplanes operate with a 2-pilot crew and can seat up to 380 passengers. The modification consists of installing electronic flight and engine instrument systems. These systems have a potential to be vulnerable to high-intensity radiated fields (HIRF) external to the airplane.
Under provisions of 14 CFR 21.101, Canard Aerospace Corporation must show that the McDonnell Douglas Models DC-10-10, 10-15, 10-30, 10-30F, 10-40, and 10-40F airplanes, as changed, continue to meet the applicable provisions of the regulations incorporated by reference in Type Certificate No. A22WE 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 specific regulations are 14 CFR part 25, as amended by Amendments 25-1 through 25-22. In addition, the certification basis includes certain special conditions and exemptions that are not relevant to these special conditions.
If the Administrator finds that the applicable airworthiness regulations (part 25, as amended) do not contain adequate or appropriate safety standards for the McDonnell Douglas Model DC-10 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 McDonnell Douglas Model DC-10 airplanes must comply with the fuel vent and exhaust emission requirements of 14 CFR part 34 and the noise certification requirements of 14 CFR part 36. Start Printed Page 20030
As noted earlier, the McDonnell Douglas Model DC-10 airplanes modified by Canard Aerospace will incorporate the Astronautics Electronic Flight Information System (EFIS) that will perform critical functions. This system may be vulnerable to high-intensity radiated fields external to the airplane. Current airworthiness standards of part 25 do not contain adequate or appropriate safety standards for protecting this equipment from adverse effects of HIRF. So this system is considered to be a novel or unusual design feature.
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 McDonnell Douglas Model DC-10 airplanes modified by Canard Aerospace Corporation. 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 because of HIRF.
These special conditions are applicable to McDonnell Douglas Model DC-10 airplanes modified by Canard Aerospace Corporation. Should Canard Aerospace apply at a later date for a supplemental type certificate to modify any other model included on Type Certificate No. A22WE to incorporate the same or similar novel or unusual design feature, these special conditions would apply to that model as well under provisions of § 21.101.
This action affects only certain novel or unusual design features on McDonnell Douglas Model DC-10 airplanes modified by Canard Aerospace Corporation. 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.
Therefore, under the authority delegated to me by the Administrator, the following special conditions are issued as part of the supplemental type certification basis for the McDonnell Douglas Models DC-10-10, 10-15, 10-30, 10-30F, 10-40, and 10-40F airplanes modified by Canard Aerospace Corporation.
[FR Doc. E7-7699 Filed 4-20-07; 8:45 am]