Page 692 - UK Air Operations Regulations 201121

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~ Regulation NCO - ANNEX VII - Non-Commercial Operations with Non-Complex Motor Powered Aircraft
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; and
(c) a means of preventing malfunction of the airspeed indicating system required in (a)(4)
due to condensation or icing.
NCO.IDE.A.125 (a)(1) AMC1 Operations under VFR & operations under IFR — flight and navigational instruments and associated
equipment
MEANS OF MEASURING AND DISPLAYING MAGNETIC HEADING
The means of measuring and displaying magnetic direction should be a magnetic compass or
equivalent.
NCO.IDE.A.125 (a)(2) AMC1 Operations under VFR & operations under IFR — flight and navigational instruments and associated
equipment
MEANS OF MEASURING AND DISPLAYING THE TIME
A means of measuring and displaying the time in hours, minutes and seconds may be a wrist watch
capable of the same functions.
NCO.IDE.A.125 (a)(3) AMC1 Operations under VFR operations & operations under IFR — flight and navigational instruments and
associated equipment
CALIBRATION OF THE MEANS OF MEASURING AND DISPLAYING PRESSURE ALTITUDE
The instrument measuring and displaying pressure altitude should be of a sensitive type calibrated in
feet (ft), with a sub-scale setting, calibrated in hectopascals/millibars, adjustable for any barometric
pressure likely to be set during flight.
NCO.IDE.A.125 (a)(3) GM1 Operations under IFR — flight and navigational instruments and associated equipment
ALTIMETERS
Altimeters with counter drum-pointer or equivalent presentation are considered to be less susceptible
to misinterpretation for aeroplanes operating above 10 000 ft.
NCO.IDE.A.125 (a)(4) AMC1 Operations under VFR & operations under IFR — flight and navigational instruments and associated
equipment
CALIBRATION OF THE INSTRUMENT INDICATING AIRSPEED
(a) The instrument indicating airspeed should be calibrated in knots (kt).
(b) In the case of aeroplanes with a maximum certified take-off mass (MCTOM) below 2 000
kg, calibration in kilometres per hour (kph) or in miles per hour (mph) is acceptable when
such units are used in the AFM.
NCO.IDE.A.125 (a)(9) AMC1 Operations under IFR — flight and navigational instruments and associated equipment
MEANS OF DISPLAYING OUTSIDE AIR TEMPERATURE
(a) The means of displaying outside air temperature should be calibrated in degrees Celsius.
(b) In the case of aeroplanes with a maximum certified take-off mass (MCTOM) below 2 000
kg, calibration in degrees Fahrenheit is acceptable, when such unit is used in the AFM.
(c) The means of displaying outside air temperature may be an air temperature indicator that
provides indications that are convertible to outside air temperature.
NCO.IDE.A.125 (c) AMC1 Operations under IFR — flight and navigational instruments and associated equipment
MEANS OF PREVENTING MALFUNCTION DUE TO CONDENSATION OR ICING
The means of preventing malfunction due to either condensation or icing of the airspeed indicating
system should be a heated pitot tube or equivalent.
NCO.IDE.A.125 GM1 Operations under IFR — flight and navigational instruments and associated equipment
ALTERNATE SOURCE OF STATIC PRESSURE
Aeroplanes should be equipped with an alternate source of static pressure.
NCO.IDE.A.125 GM1 Operations under IFR — flight and navigational instruments and associated equipment
ALTERNATE SOURCE OF STATIC PRESSURE
Aeroplanes should be equipped with an alternate source of static pressure.
NCO.IDE.A.125(a)(3) GM1 Operations under IFR — flight and navigational instruments and associated equipment
ALTIMETERS
Altimeters with counter drum-pointer or equivalent presentation are considered to be less susceptible
to misinterpretation for aeroplanes operating above 10 000 ft.
NCO.IDE.A.130 Terrain awareness warning system (TAWS)
Turbine-powered aeroplanes certified for a maximum passenger seating configuration of more than
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