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DGAC- FRANCE

 

 

Additional technical specifications for kit built aircraft fitted with electronic display providing flight, navigation and engine datas (EFIS)

 

Edition 1 of March 27, 2007.

 

 

These additional technical specifications apply to kit built or home built (amateur) aircraft, on which an instruments system including an electronic display system of flight, navigation and engine data is fitted.

 

 

1- Function and installation

 

Each component of equipment fitted must :

-          be of a type and design suited to fulfill its function,

-          have a placard indicating its identity, its function, its function limits or adequate combination of these datas.

-          be installed according to specified limitations of the equipment,

-          work right, once fitted.

 

 

2- Equipments, system and installation

 

The design of each equipment or system must be examined separately and in connection with other systems and equipments of the aircraft to specify whether the reliability and full function of this equipment or of this system are necessary to continue safe flight.

 

Each component of equipment, when providing its aimed function, must not affect in a wrong way:

 

-          response, functioning or precision of any essential equipment for safe use;

-          or response, functioning or precision of any other equipment unless an adequate means of warning the pilot of the trouble is fitted.

 

Critical environment situations must be taken in consideration.

 

Equipments, systems and installations must be designed in way to reduce to minimum dangers for aircraft in case of ill functioning or probable failure.

 

 

3- Electronic instruments display

 

Electronic display indicators must meet disposition and visibility requirements, and be located in such way that pilot in command can check indications displayed.

 

 

If alarm lights, warning lights or indicators are installed in the cockpit, they must be:

-          red, for alarm lights,

-          amber, for warning lights,

-          green, for safe functioning,

-          all any other colours, including white, for lights non described above if the colour is different enough from described above colours to avoid error.

 

4- Electric power feeding

 

Protection devices such as fuses or breakers must be installed.

Each electric connection wire must have adequate gauge.

 

It must be demonstrated that an electric failure of the main circuit in board does not lead to a loss of required functions , making it difficult or dangerous to continue flight.

 

 

5- Reference marks and limitations

 

The aircraft must show reference marks and indications stickers required for safe use.

 

System limitations must be described in documentation of the equipment or on stickers.

 

6-Documentation

 

Operating manuals of the provider must give sufficient information for good use and good maintenance of the EFIS.

 

The flight manual must specify redundant instruments to be fitted, in case of need.

 

 

 

 

 

ACCEPABLE MEANS OF SUITABILITY COMPLIANCE AND INTERPRETATION

 

Function and installation / Equipments, system and installation

 

1 – Description / performance level

 

The accordance to functional, precision and integrity criterions must be established.

This accordance must be established following the technical specifications of the manufacturer permitting to demonstrate that the equipment matches its functioning requirements.

 

2- Conception level

 

Considering the hardware, environmental conditions such as temperature, vibrations, electro-magnetic interferences must be examined.

 

( during this examination, it is strongly recommended to refer to norm EUROCAE- ED14 / RTCA DO 160: “environmental conditions and test procedures for airborne equipment”.)

 

The software development will follow a method allowing to avoid risk of error.

 

The software management and its evolutions must permit to follow all developed editions.

 

An insurance quality process must be implemented to be sure that all specifications above are matched.

 

 

Electronic instruments display

 

To use the system, criterions of easy access to various functions, legibility and warnings must be examined.

 

Colours and control means of display function must be easily used by pilot.

 

The applicant must conduct an analysis of the screen legibility when system displays all modes and s/ modes possibly selected by pilot ( analysis of “over cluttered” display).

 

 

 

Electric power feeding

 

The reliability of electric feeding must be in accordance to equipment use.

 

An electric load analysis sheet of installation and the identification of circuit breakers will provide an acceptable means of compliance.