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have been complied with.
4.3.2 Completed flight preparation forms shall be kept by
an operator for a period of three months.
4.3.3 Operational flight planning
4.3.3.1 An operational flight plan shall be completed for
every intended flight. The operational flight plan shall be
approved and signed by the pilot-in-command and, where
applicable, signed by the flight operations officer/flight dispatcher,
and a copy shall be filed with the operator or a designated
agent, or, if these procedures are not possible, it shall be
left with the aerodrome authority or on record in a suitable
place at the point of departure.
Note.— The duties of a flight operations officer/flight
dispatcher are contained in 4.6.
4.3.3.2 The operations manual must describe the content
and use of the operational flight plan.
4.3.4 Alternate aerodromes
4.3.4.1 Take-off alternate aerodrome
4.3.4.1.1 A take-off alternate aerodrome shall be selected
and specified in the operational flight plan if the weather conditions
at the aerodrome of departure are at or below the applicable
aerodrome operating minima or it would not be possible
to return to the aerodrome of departure for other reasons.
4.3.4.1.2 The take-off alternate aerodrome shall be located
within the following distance from the aerodrome of departure:
a) aeroplanes having two power-units. Not more than a
distance equivalent to a flight time of one hour at the
single-engine cruise speed; and
b) aeroplanes having three or more power-units. Not more
than a distance equivalent to a flight time of two hours
at the one-engine inoperative cruise speed.
4.3.4.1.3 For an aerodrome to be selected as a take-off
alternate the available information shall indicate that, at the
estimated time of use, the conditions will be at or above the
aerodrome operating minima for that operation.
4.3.4.2 En-route alternate aerodromes
En-route alternate aerodromes, required by 4.7 for extended
range operations by aeroplanes with two turbine power-units,
shall be selected and specified in the operational and air traffic
services (ATS) flight plans.
4.3.4.3 Destination alternate aerodromes
For a flight to be conducted in accordance with the instrument
flight rules, at least one destination alternate aerodrome shall
be selected and specified in the operational and ATS flight
plans, unless:
a) the duration of the flight and the meteorological conditions
prevailing are such that there is reasonable
certainty that, at the estimated time of arrival at the aerodrome
of intended landing, and for a reasonable period
before and after such time, the approach and landing
may be made under visual meteorological conditions; or
b) the aerodrome of intended landing is isolated and there
is no suitable destination alternate aerodrome.
4.3.5 Weather conditions
4.3.5.1 A flight to be conducted in accordance with the
visual flight rules shall not be commenced unless current
meteorological reports or a combination of current reports and
forecasts indicate that the meteorological conditions along the
route or that part of the route to be flown under the visual
flight rules will, at the appropriate time, be such as to render
compliance with these rules possible.
4.3.5.2 A flight to be conducted in accordance with instrument
flight rules shall not be commenced unless information is
available which indicates that conditions at the aerodrome of
intended landing or, where a destination alternate is required,
at least one destination alternate aerodrome will, at the estimated
time of arrival, be at or above the aerodrome operating
minima.
Chapter 4 Annex 6 — Operation of Aircraft
4-5 12/31/111/0/016
No. 30
Note.— It is the practice in some States to declare, for flight
planning purposes, higher minima for an aerodrome when
nominated as a destination alternate than for the same aerodrome
when planned as that of intended landing.
4.3.5.3 A flight to be operated in known or expected icing
conditions shall not be commenced unless the aeroplane is
certificated and equipped to cope with such conditions.
4.3.5.4 A flight to be planned or expected to operate in
suspected or known ground icing conditions shall not take off
unless the aeroplane has been inspected for icing and, if necessary,
has been given appropriate de-icing/anti-icing treatment.
Accumulation of ice or other naturally occurring contaminants
shall be removed so that the aeroplane is kept in an airworthy
condition prior to take-off.
Note.— Guidance material is given in the Manual of Aircraft
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