Source: https://www.federalregister.gov/documents/2007/03/22/E7-5183/special-conditions-aviation-technology-group-incorporated-javelin-model-no-100-firewalls-for
Timestamp: 2018-03-18 02:51:18
Document Index: 588020166

Matched Legal Cases: ['art 23', 'art 23', 'art 23', 'art 23', 'art 23', '§\u200921', 'art 34', 'art 36', '§\u200923']

Federal Register :: Special Conditions: Aviation Technology Group, Incorporated, Javelin Model No. 100; Firewalls for Fuselage Mounted Engines and Fire Extinguishing for Aft Fuselage Mounted Engines
Special Conditions: Aviation Technology Group, Incorporated, Javelin Model No. 100; Firewalls for Fuselage Mounted Engines and Fire Extinguishing for Aft Fuselage Mounted Engines
72 FR 13436
Special Conditions No. 23-203-SC
E7-5183
https://www.federalregister.gov/d/E7-5183 https://www.federalregister.gov/d/E7-5183
These special conditions are issued for the Aviation Technology Group, Incorporated, Javelin Model No. 100 airplane. This airplane will have novel or unusual design features associated with aft mounted engine fire protection. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. 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.
Leslie B. Taylor, Regulations & Policy Branch, ACE-111, Small Airplane Directorate, Aircraft Certification Service, 901 Locust, Kansas City, Missouri 64106; telephone (816) 329-4134; facsimile (816) 329-4090, e-mail at leslie.b.taylor@faa.gov.
On February 25, 2005, Aviation Technology Group, Incorporated applied for a type certificate for their new Javelin Model No. 100. The Javelin Model No. 100 is a two-place acrobatic airplane with two fuselage mounted turbofan engines.
Part 23 historically addressed fire protection on multiengine airplanes based on the assumption that the engines are sufficiently separated to essentially eliminate the possibility of an engine fire spreading to another engine. On traditional multiengine airplanes, this has been achieved by locating engines on the wings separated by the fuselage. This configuration ensures that an engine fire on one side does not migrate to the opposite engine. This configuration also protects the opposite engine from heat radiating from the engine fire. Prevention, identification, and containment are traditional means of fire protection. Prevention has been provided through minimizing the potential for ignition of flammable fluids and vapors. Identification has been provided by locating engines within the pilots' primary field of view and/or with the incorporation of fire detection systems. This has provided both rapid detection of a fire and confirmation when it was extinguished. Containment has been provided through the isolation of designated fire zones through flammable fluid shutoff valves and firewalls. This philosophy also ensures that components of the engine control system will function effectively to permit a safe shutdown of an engine. However, containment has only been demonstrated for 15 minutes. If a fire occurs in traditional part 23 airplanes, the appropriate corrective action is to land as soon as possible. For a small, simple airplane originally envisioned by part 23, it is possible to descend and land within 15 minutes. Thus, the occupants can safely exit the airplane before the firewall is breached. These simple airplanes normally have the engine located away from critical flight control systems and primary structure. Start Printed Page 13437This has ensured that, throughout a fire event, a pilot can continue safe flight, and it has made the prediction of fire effects relatively easy.
Title 14 CFR part 23, did not envision the type of configuration of the Javelin Model No. 100 airplane.
If the Administrator finds that the applicable airworthiness regulations in 14 CFR part 23 do not contain adequate or appropriate safety standards for the Javelin Model No. 100 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 Javelin Model No. 100 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.
The Javelin Model No. 100 will incorporate the following novel or unusual design features:
The Javelin Model No. 100 incorporates two turbofan engines located side-by-side in compartments in the aft fuselage.
Notice of proposed special conditions No. 23-07-01-SC for the Aviation Technology Group, Incorporated, Javelin Model No. 100 airplanes was published on January 8, 2007 (72 FR 660). One comment was received. It agreed with the proposed special conditions. No change was requested.
As discussed above, these special conditions are applicable to the Javelin Model No. 100. Should Aviation Technology Group, Incorporated, apply at a later date for a change to the type certificate to include another model on the same type certificate incorporating the same novel or unusual design feature, the special conditions would apply to that model as well.
Accordingly, pursuant to the authority delegated to me by the Administrator, the following special conditions are issued as part of the type certification basis for Aviation Technology Group, Incorporated, Javelin Model No. 100 airplanes.
Title: Firewalls for Fuselage Mounted Engines and Fire Extinguishing for Aft Fuselage Mounted Engines.
1. SC 23.1195—Add the requirements of § 23.1195 while deleting “For commuter category,” adding the requirement to “minimize the probability of re-ignition,” and deleting the statement “An individual ‘one-shot' system may be used.”
(a) Each extinguishing agent container must have a pressure relief to prevent bursting of the container by excessive internal pressures. Start Printed Page 13438
Issued in Kansas City, Missouri, on March 12, 2007.
[FR Doc. E7-5183 Filed 3-21-07; 8:45 am]