Source: https://www.federalregister.gov/documents/2007/07/27/E7-14593/special-conditions-cessna-model-650-airplanes-high-intensity-radiated-fields-hirf
Timestamp: 2018-08-15 11:50:25
Document Index: 328649850

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

Federal Register :: Special Conditions: Cessna Model 650 Airplanes; High-Intensity Radiated Fields (HIRF)
A Rule by the Federal Aviation Administration on 07/27/2007
The effective date of these special conditions is July 18, 2007. We must receive your comments by August 27, 2007.
72 FR 41216
Docket No. NM380
Special Conditions No. 25-361-SC
E7-14593
https://www.federalregister.gov/d/E7-14593 https://www.federalregister.gov/d/E7-14593
These special conditions are issued for Cessna Model 650 airplanes modified by Columbia Avionics, Inc. 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 consists of installing an Electronic Flight Instrument System (EFIS) with the options for the Universal Avionics Vision 1 Synthetic Vision System. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for the protection of these systems from the effects of high-Start Printed Page 41217intensity 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 must mail two copies of your comments to: Federal Aviation Administration, Transport Airplane Directorate, Attention: Rules Docket (ANM-113), Docket No. NM380, 1601 Lind Avenue SW., Renton, Washington 98057-3356. You may deliver two copies to the Transport Airplane Directorate at the above address. You must mark your comments: Docket No. NM380. You can inspect comments in the Rules Docket weekdays, except Federal Holidays, between 7:30 a.m. and 4 p.m.
On March 15, 2007, Columbia Avionics, Inc., 11200 Airport Road, Columbia, Missouri, 65201, applied for a supplemental type certificate (STC) to modify Cessna Model 650 airplanes. The Cessna Model 650 is a low-wing, pressurized, transport category airplane with two fuselage-mounted jet engines. It can seat up to 19 passengers, with a crew of two pilots. The modification consists of installing an electronic flight instrument system (EFIS) with the options for the Universal Avionics Vision 1 Synthetic Vision System. These systems have the potential to be vulnerable to high-intensity radiated fields (HIRF) external to the airplane.
Under 14 CFR 21.101, Columbia Avionics, Inc., must show that the Cessna Model 650 airplanes, as changed, continue to meet the applicable provisions of the regulations incorporated by reference in Type Certificate No. A9NM, 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 incorporated by reference in Type Certificate No. A9NM include the following: Part 25 of the Federal Aviation Regulations (FAR) effective February 1, 1965, as amended by Amendments 25-1 through 25-39. In addition, the following regulations apply: §§ 25.901(c) and 25.1199, as amended by Amendments 25-1 through 25-40; §§ 25.1309 and 25.1351(d), as amended by Amendments 25-1 through 25-41; §§ 25.177, 25.255, and 25.703, as amended by Amendments 25-1 through 25-42; § 25.1326, as amended by Amendments 25-1 through 25-43; § 25.1413, as amended by Amendments 25-1 through 25-44; and §§ 25.1305 and 25.1529, as amended by Amendments 25-1 through 25-54. In addition, the certification basis includes certain special conditions, exemptions, equivalent levels of safety, or later amended sections of the applicable part 25 regulations that are not relevant to these special conditions. These special conditions will form an additional part of the supplemental type certification basis.
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 Cessna Model 650 airplanes because of a novel or unusual design feature, special conditions are prescribed under § 21.16.
Besides the applicable airworthiness regulations and special conditions, the Cessna Model 650 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.
Special conditions are initially applicable to the model for which they are issued. Should Columbia Avionics apply later for a supplemental type certificate to modify any other model included on Type Certificate No. A9NM to incorporate the same or similar novel or unusual design feature, these special conditions would also apply to the other model under § 21.101.
As noted earlier, the Cessna Model 650 airplanes modified Columbia Avionics will incorporate dual Electronic Primary Flight Displays 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 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 equivalent to that intended by Start Printed Page 41218the regulations incorporated by reference, special conditions are needed for the Cessna 650 airplanes modified by Columbia Avionics. 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.
As discussed above, these special conditions are applicable to Cessna Model 650 airplanes modified by Columbia Avionics. Should Columbia Avionics apply later for a supplemental type certificate to modify any other model included on Type Certificate No. A9NM to incorporate the same or similar novel or unusual design feature, these special conditions would apply to that model as well under § 21.101.
This action affects only certain novel or unusual design features on Cessna Model 650 airplanes modified by Columbia Avionics. 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 Cessna Model 650 airplanes modified by Columbia Avionics.
[FR Doc. E7-14593 Filed 7-26-07; 8:45 am]