NCC.IDE.A.125 Operations under IFR – flight and navigational instruments and associated equipment

Aeroplanes operated under IFR shall be equipped with:

(a)a means of measuring and displaying the following:

(1)magnetic heading;

(2)time in hours, minutes and seconds;

(3)barometric altitude;

(4)indicated airspeed;

(5)vertical speed;

(6)turn and slip;

(7)attitude;

(8)stabilised heading;

(9)outside air temperature; and

(10)Mach number whenever speed limitations are expressed in terms of Mach number;

(b)a means of indicating when the supply of power to the gyroscopic instruments is not adequate;

(c)whenever two pilots are required for the operation, an additional separate means of displaying for the second pilot:

(1)barometric altitude;

(2)indicated airspeed;

(3)vertical speed;

(4)turn and slip;

(5)attitude;

(6)stabilised heading; and

(7)Mach number whenever speed limitations are expressed in terms of Mach number, if applicable;

(d)a means of preventing malfunction of the airspeed indicating systems required in (a)(4) and (c)(2) due to condensation or icing;

(e)an alternate source of static pressure;

(f)a chart holder in an easily readable position that can be illuminated for night operations;

(g)a second independent means of measuring and displaying altitude; and

(h)an emergency power supply, independent of the main electrical generating system, for the purpose of operating and illuminating an attitude indicating system for a minimum period of 30 minutes. The emergency power supply shall be automatically operative after the total failure of the main electrical generating system and clear indication shall be given on the instrument or on the instrument panel that the attitude indicator is being operated by emergency power.