Page 821 - UK Air Operations Regulations 201121

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~ Regulation SPO - ANNEX VIII - Specialised Operations Centrik

malfunction of the airspeed indicating system required in (a)(4) due to condensation or
icing.
(d) Whenever two pilots are required for the operation, helicopters shall be equipped with an
additional separate means of displaying:
(1) barometric altitude,
(2) indicated airspeed,
(3) slip,
(4) attitude, if applicable,
(5) vertical speed, if applicable, and
(6) stabilised heading, if applicable.
SPO.IDE.H.120 & SPO.IDE.H.125 Operations under VFR & operations under IFR — flight and navigational instruments and associated
AMC1 equipment
INTEGRATED INSTRUMENTS
(a) Individual equipment requirements may be met by combinations of instruments, by
integrated flight systems or by a combination of parameters on electronic displays. The
information so available to each required pilot should not be less than that required in the
applicable operational requirements, and the equivalent safety of the installation should be
approved during type certification of the helicopter for the intended type of operation.
(b) The means of measuring and indicating turn and 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.
SPO.IDE.H.120(a)(1) & Operations under VFR & operations under IFR — flight and navigational instruments and associated
SPO.IDE.H.125(a)(1) AMC1 equipment
MEANS OF MEASURING AND DISPLAYING MAGNETIC HEADING
The means of measuring and displaying magnetic direction should be a magnetic compass or
equivalent.
SPO.IDE.H.120(a)(2) & Operations under VFR & operations under IFR — flight and navigational instruments and associated
SPO.IDE.H.125(a)(2) AMC1 equipment
MEANS OF MEASURING AND DISPLAYING THE TIME — COMPLEX MOTOR-POWERED
AIRCRAFT
An acceptable means of compliance is a clock displaying hours, minutes and seconds, with a sweep-
second pointer or digital presentation.
MEANS OF MEASURING AND DISPLAYING THE TIME — OTHER-THAN- COMPLEX MOTOR-
POWERED AIRCRAFT
An acceptable means of measuring and displaying the time in hours, minutes and seconds may be a
wrist watch capable of the same functions.
SPO.IDE.H.120(a)(3) & Operations under VFR & operations under IFR — flight and navigational instruments and associated
SPO.IDE.H.125(a)(3) AMC1 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.
SPO.IDE.H.120(a)(4) & Operations under VFR & operations under IFR — flight and navigational instruments and associated
SPO.IDE.H.125(a)(4) AMC1 equipment
CALIBRATION OF THE INSTRUMENT INDICATING AIRSPEED
(a) The instrument indicating airspeed should be calibrated in knots (kt).
(b) In the case of helicopters with an 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.
SPO.IDE.H.120(a)(5) AMC1 Operations under VFR — flight and navigational instruments and associated equipment
SLIP
For other-than complex helicopters the means of measuring and displaying slip may be a slip string for
operations under VFR.
SPO.IDE.H.120(b)(1)(iii) & Operations under VFR & operations under IFR — flight and navigational instruments and associated
SPO.IDE.H.125(a)(8) AMC1 equipment
STABILISED HEADING
Stabilised direction should be achieved for VFR flights by a gyroscopic direction indicator, whereas for
IFR flights, this should be achieved through a magnetic gyroscopic direction indicator.
SPO.IDE.H.120(b)(3) & Operations under VFR & operations under IFR — flight and navigational instruments and associated
SPO.IDE.H.125(d) AMC1 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.
SPO.IDE.H.120(d) & Operations under VFR & operations under IFR — flight and navigational instruments and associated
SPO.IDE.H.125(c) AMC1 equipment
MULTI-PILOT OPERATIONS — DUPLICATE INSTRUMENTS
Duplicate instruments include separate displays for each pilot and separate selectors or other
associated equipment where appropriate.
SPO.IDE.H.125 Operations under IFR — flight and navigational instruments and associated equipment
Helicopters operated under IFR shall be equipped with:
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