CS 25.703 Take-off warning system
ED
Decision 2003/2/RM
(See AMC 25.703)
A take-off
warning system must be installed and must meet the following requirements:
(a) The system must provide to the pilots an
aural warning that is automatically activated during the initial portion of
the take-off roll if the aeroplane is in a configuration, including any of the
following that would not allow a safe take-off:
(1) The wing-flaps or leading edge devices are
not within the approved range of take-off positions.
(2) Wing spoilers (except lateral control
spoilers meeting the requirements of CS 25.671), speed brakes, or longitudinal
trim devices are in a position that would not allow a safe take-off.
(3) The parking brake is unreleased.
(b) The aural warning required by sub-paragraph
(a) of this paragraph must continue until –
(1) The take-off configuration is changed to
allow a safe take-off;
(2) Action is taken by the pilot to terminate
the take-off roll;
(3) The aeroplane is rotated for take-off; or
(4) The warning is manually silenced by the
pilot. The means to silence the warning must not be readily available to the
flight crew such that it could be operated instinctively, inadvertently, or by
habitual reflexive action. Before each take-off, the warning must be rearmed
automatically, or manually if the absence of automatic rearming is clear and
unmistakable.
(c) The means used to activate the system
must function properly for all authorised take-off power settings and
procedures, and throughout the ranges of take-off weights, altitudes, and
temperatures for which certification is requested.
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