14.3.1 The design and arrangement of the compartment
from which the crew operate the craft, and the relative positions
of the primary and emergency controls and the seats should be such
that each operating crew member, with his seat and any adjustable
controls suitably adjusted, and without prejudicing compliance with 14.2.1 can:
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(a) without interference, produce full and unrestricted
movement of each control which he is responsible for operating, both
separately and with all practical combinations of movement of other
controls; and
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(b) at all control positions exert adequate control
forces for the operation to be performed.
14.3.2 When a seat at a station from which the
craft may be driven has been adjusted so as to suit the occupant,
subsequent change of seat position to operate any controls needed
for driving should not be acceptable.
14.3.3 In craft where the Administration considers
the provision of a safety belt is necessary for use by the operating
crew, it should be possible for those operating crew members, with
their safety belts correctly worn, to comply with 14.3.1, except in
respect of controls which it can be shown will only be required on
very rare occasions dissociated from the need for safety restraint.