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OPERATIONS — HELICOPTERS
1 The flight and navigational instruments required are:
(a) an airspeed indicating system; and
(b) a pressure altimeter with a readily adjustable pressure datum setting scale
graduated in millibars; and
(c) (i) a direct reading magnetic compass; or
(ii) a remote indicating magnetic compass and a standby direct reading
magnetic compass; and
(d) an accurate timepiece indicating hours, minutes and seconds. This may be
carried on the person of the pilot or navigator.
2 In addition to the instruments required under paragraph 1, helicopters engaged
in regular public transport, charter or aerial work operations and operating
under the Visual Flight Rules, shall be equipped with:
(a) a slip indicator; and
(b) an outside air temperature indicator when operating from or to a location
at which ambient air temperature is not available from ground-based
instruments.
-19- SECTION 20.18
Issue 9
Issue 9: 8 December 2004
Amdt No. 222
APPENDIX VII
INSTRUMENTS REQUIRED FOR INSTRUMENT FLIGHT RULES
OPERATIONS IN HELICOPTERS (EXCEPT NIGHT V.M.C.)
1 The flight and navigational instruments required in a helicopter which is
required to be operated by 2 pilots are:
(a) 2 airspeed indicators together with 1 airspeed indicating system with
means of preventing malfunction due to either condensation or icing; and
(b) 2 sensitive pressure altimeters; and
(c) (i) a direct reading magnetic compass; or
(ii) a remote indicating compass and a standby direct reading magnetic
compass; and
(d) an accurate timepiece indicating the time in hours, minutes and seconds;
and
(e) 2 instantaneous vertical speed indicators; and
(f) an outside air temperature indicator; and
(g) 2 attitude indicators (artificial horizons) having a 5 inch dial presentation
and a standby attitude indicator positioned so as to be usable by the pilot
in command and plainly visible by both pilots by day and by night; and
(h) a heading indicator (directional gyroscope); and
(i) 2 slip indicators; and
(j) provision to indicate whether the power supply to the gyroscopic
instruments is working satisfactorily.
2 The minimum flight and navigation instruments required in a helicopter which
is operated by a single pilot are:
(a) an airspeed indicating system with means of preventing malfunction due
to either condensation or icing; and
(b) 2 sensitive pressure altimeters; and
(c) (i) a direct reading magnetic compass; or
(ii) a remote indicating compass and a standby direct reading magnetic
compass; and
(d) an accurate timepiece indicating the time in hours, minutes and seconds;
and
(e) instantaneous vertical speed indicator; and
(f) an outside air temperature indicator; and
(g) an attitude indicator having a 5 inch dial presentation and a standby
attitude indicator positioned so as to be usable by the pilot; and
(h) a heading indicator (directional gyroscope); and
(i) a slip indicator; and
(j) provision to indicate whether the power supply to the gyroscopic
instruments is working satisfactorily.
3 The instruments specified in subparagraphs 1 (a), (b) and (e) and 2 (a), (b) and
(e) of this Appendix shall be capable of being connected to more than 1 static
source or shall be connected to a balanced pair of flush static ports. Instruments
SECTION 20.18 -20-
Issue 9
Issue 9: 8 December 2004
Amdt No. 222
and equipment other than mandatory flight instruments shall not be connected
to the static system that operates the instruments used by the pilot in command.
4 The instruments specified in subparagraphs 1 (h) and 2 (h) shall have a
duplicated source of power supply.
5 The 5 inch dial attitude indicators specified in subparagraphs 1 (g) and 2 (g)
shall have duplicate sources of power supply. The standby attitude indicator
shall have a power source independent of the electrical generating system and
shall operate independent of any other attitude indicating system installed.
6 The standby attitude indicator installation specified in subparagraphs 1 (g) and
2 (g) shall be one in which:
(a) the indicator complies with US Technical Standard Order C4c or
equivalent specification acceptable to CASA; and
(b) the indicator and its lighting will continue to operate for 30 minutes
following the failure of the electrical power generating system without any
action by the flight crew; and
(c) the position size and lighting of the instrument display allows its use from
the pilot in command’s operating station by day and by night; and
(d) the operation is independent of other attitude indicator installations.
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