Source: https://www.federalregister.gov/documents/2004/09/22/04-21225/special-conditions-lockheed-martin-corporation-model-1329-23a--23d--23e-and-1329-25-airplanes
Timestamp: 2018-04-25 21:25:53
Document Index: 27010068

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

Federal Register :: Special Conditions: Lockheed Martin Corporation Model 1329-23A, -23D, -23E, and 1329-25 Airplanes; High-Intensity Radiated Fields (HIRF)
Special Conditions: Lockheed Martin Corporation Model 1329-23A, -23D, -23E, and 1329-25 Airplanes; High-Intensity Radiated Fields (HIRF)
The effective date of these special conditions is September 13, 2004. Comments must be received on or before October 22, 2004.
69 FR 56674
Docket No. NM288
Special Conditions No. 25-271-SC
04-21225
https://www.federalregister.gov/d/04-21225 https://www.federalregister.gov/d/04-21225
These special conditions are issued for Lockheed Martin Corporation Model 1329-23A, -23D, -23E and 1329-25 airplanes modified by Garrett Aviation Services. These modified airplanes will have novel or unusual design features when compared to the state of technology envisioned in the airworthiness standards for transport category airplanes. The modification incorporates the installation of four Honeywell N1 Digital Electronic Engine Controls (DEEC) 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, Attn: Rules Docket (ANM-113), Docket No. NM288, 1601 Lind Avenue, SW., Renton, Washington 98055-4056; or delivered in duplicate to the Transport Directorate at the above address. All comments must be marked Docket No. NM288.
We will consider all comments we receive on or before the closing date for Start Printed Page 56675comments. We will consider comments filed late if it is possible to do so without incurring expense or delay. We may change these special conditions based on the comments we receive.
On December 4, 2003, Garrett Aviation Services, 1200 North Airport Drive, Capital Airport Springfield, IL 62707, applied for a supplemental type certificate (STC) to modify Lockheed Martin Corporation Model 1329-23A, -23D, -23E and 1329-25 airplanes. These models are currently approved under Type Certificate No. 2A15. They are transport category airplanes. The Lockheed Martin Corporation Model 1329-23A, -23D, -23E and 1329-25 airplanes are powered by four AiResearch TFE731-3-1F turbofan engines and have a maximum takeoff weight of 44,500 pounds. This airplane operates with a 2-pilot crew and can hold up to 10 passengers. The modification incorporates the installation of Honeywell N1 Digital Electronic Engine Controls (DEEC). The N1 Digital Electronic Engine Controls (DEEC) are a replacement for the existing analog electronic engine control (EEC) and also provide additional functional capability to the system. The digital avionics/electronics and electrical systems installed under this project in these airplanes have the potential to be vulnerable to high-intensity radiated fields (HIRF) external to the airplane.
Under the provisions of 14 CFR 21.101, Garrett Aviation Services must show that the Lockheed Martin Corporation Model 1329-23A, -23D, -23E and 1329-25 airplanes, as changed, continue to meet the applicable provisions of the regulations incorporated by reference in Type Certificate No. 2A15, 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 certification basis for the Lockheed Martin Corporation Model 1329-23A, -23D, -23E and 1329-25 airplanes includes 14 CFR Part 25, dated February 1, 1964, as amended by Amendments 25-1 through 25-20, except for special conditions and exceptions noted in Type Certificate Data Sheet (TDCS) 2A15.
If the Administrator finds that the applicable airworthiness regulations (that is, 14 CFR part 25, as amended) do not contain adequate or appropriate safety standards for the Lockheed Martin Corporation Model 1329-23A, -23D, -23E and 1329-25 airplanes because of novel or unusual design features, special conditions are prescribed under the provisions of § 21.16.
In addition to the applicable airworthiness regulations and special conditions, the Lockheed Martin Corporation Model 1329-23A, -23D, -23E and 1329-25 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 Garrett Aviation Services apply at a later date for a supplemental type certificate to modify any other model included on Type Certificate No. 2A15 to incorporate the same or similar novel or unusual design features, these special conditions would also apply to the other model under the provisions of 14 CFR 21.101.
The Lockheed Martin Corporation Model 1329-23A, -23D, -23E and 1329-25 airplanes modified by Garrett Aviation Services will incorporate Honeywell N1 Digital Electronic Engine Controls (DEEC) that will perform critical functions. These systems have the potential to be vulnerable to high-intensity radiated fields (HIRF) 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, these systems are considered to be novel or unusual design features.
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 Lockheed Martin Corporation Model 1329-23A, -23D, -23E and 1329-25 airplanes modified by Garrett Aviation Services. 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 Lockheed Martin Corporation Model 1329-23A, -23D, -23E and 1329-25 airplanes modified by Garret Aviation Services. Should Garrett Aviation Services apply at a later date for a supplemental type certificate to modify any other model included on Type Certificate No. 2A15 to incorporate the same or similar novel or unusual design features, these special conditions would apply to that model as well under the provisions of § 21.101.
This action affects only certain novel or unusual design features on the Lockheed Martin Corporation Model 1329-23A, -23D, -23E and 1329-25 airplanes modified by Garrett Aviation Services. 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 Lockheed Martin Corporation Model 1329-23A, -23D, -23E and 1329-25 airplanes modified by Garrett Aviation Services.
[FR Doc. 04-21225 Filed 9-21-04; 8:45 am]