Page 400 - UK Air Operations Regulations 201121

Part CAT - ANNEX IV - Commercial Air Transport Operations

(v) Vertical speed;
(vi) Slip; and
(vii) Outside air temperature.
(2) A means of indicating when the supply of power to the required flight instruments is
not adequate.
(b) Whenever two pilots are required for the operation, an additional separate means of
displaying the following shall be available for the second pilot:
(1) Barometric altitude;
(2) Indicated airspeed;
(3) Vertical speed; and
(4) Slip.
(c) Helicopters with an MCTOM of more than 3 175 kg or any helicopter operating over water
when out of sight of land or when the visibility is less than 1500 m, shall be equipped with a
means of measuring and displaying:
(1) Attitude; and
(2) Heading.
(d) A means for preventing malfunction of the airspeed indicating systems due to
condensation or icing shall be available for helicopters with an MCTOM of more than 3175
kg or an MOPSC of more than nine.
CAT.IDE.H.125 AMC1 & Operations under VFR by day & Operations under IFR or at night — flight and navigational instruments and
CAT.IDE.H.130 AMC1 associated equipment
INTEGRATED INSTRUMENTS
(a) Individual equipment requirements may be met by combinations of instruments or by
integrated flight systems or by a combination of parameters on electronic displays,
provided that the information so available to each required pilot is not less than the required
in the applicable operational requirements, and the equivalent safety of the installation has
been shown during type certification approval of the helicopter for the intended type of
operation.
(b) The means of measuring and indicating slip, helicopter attitude and stabilised helicopter
heading may be met by combinations of instruments or by integrated flight director
systems, provided that the safeguards against total failure, inherent in the three separate
instruments, are retained.
CAT.IDE.H.125 GM1 & Operations under VFR by day & Operations under IFR or at night — flight and navigational instruments and
CAT.IDE.H.130 GM1 associated equipment
SUMMARY TABLE

CAT.IDE.H.125(a)(1)(i) AMC1 & Operations under VFR by day & Operations under IFR or at night — flight and navigational instruments and
CAT.IDE.H.130(a)(1) AMC1 associated equipment
MEANS OF MEASURING AND DISPLAYING MAGNETIC HEADING
The means of measuring and displaying magnetic direction should be a magnetic compass or
equivalent.
CAT.IDE.H.125(a)(1)(ii) AMC1 & Operations under VFR by day & Operations under IFR or at night — flight and navigational instruments and
CAT.IDE.H.130(a)(2) AMC1 associated equipment
MEANS OF MEASURING AND DISPLAYING THE TIME
20th November 2021 400 of 856