14.2.1 The Administration should be satisfied
that the view from the control position is adequate for the safe operation
of the craft in all operating conditions.
14.2.2 On craft with an enclosed operating compartment,
it should be demonstrated to the satisfaction of the Administration
that an adequate portion of the windscreen and windows serving the
operating station can be maintained in a clear condition during operation
in conditions of spray or precipitation. The cleared portion of the
windscreen and windows should be adequate for the field of vision
necessary for normal operations, approach to and coming to rest at
all operating speeds. On craft intended for operation in icing conditions,
this requirement should be met in icing conditions up to the severity
in which the craft as a whole has been shown to be satisfactory.
14.2.3 The means provided for maintaining the
windscreen and windows in a clear condition should be so arranged
that no reasonably probable single failure can result in a reduction
of the cleared field of vision such as to interfere seriously with
the ability of the operating crew to continue the operation and bring
the craft to rest.