preflight
inspection
Generally, with a few exceptions, the
preflight inspection
of a seaplane is similar to that of a landplane. The
major difference is the checking of floats or hull. The
manufacturer's manual or handbook should be used in
conducting the inspection.
The pilot should first note how the seaplane is setting
in the water prior to each flight. If the sterns of the floats
are very low in the water, consideration should be given to
how the seaplane is loaded. Also, if lower than normal for
a given load, a rear compartment may have a leak.
Floats and hulls should be inspected for obvious or
apparent defects and damage, such as loose rivets, corrosion,
separation of seams, punctures, and general condition
of the metal skin. Because of the rigidity of the float
installation, fittings and adjacent structure should be
checked for cracks, defective welds, proper attachment,
alignment, and safetying. All hinged points should be
examined for wear and corrosion, particularly if the seaplane
is operated in salt water.
If water rudders are
installed, the should be inspected for free and proper
movement.
It is important to check each compartment of the floats
or hull for any accumulation of water before flight. Even
small amount of water, such as a cup full, is not unusual
and can occur from condensation or normal leakage. All
water should be removed before flight, because the water
may critically affect the location of the seaplane's centre of
gravity.
If an excessive amount of water is found, a thorough
search for the leak should be made. If drain plugs and
inspection plates are installed, a systematic method of
removing and reinstalling these plugs and plates securely
should be used. Naturally, it is extremely important to
ensure that all drain plugs and inspection plates are
securely in place before launching the seaplane into the
water.
It is recommended that each plug and plate be
counted and placed in a receptacle upon removal and
counted again when reinstalled.
Float compartments, water rudders, etc., should be
inspected for ice if near freezing temperatures are encountered.
Airframe icing, resulting from water spray during a
takeoff or landing, must also be considered. Part of the
preflight inspection should include a cabin inspection. All
items must be secured, such as anchors and paddles prior
to takeoff. Floatation gear should be available for each
occupant.
During the preflight and boarding of passengers, a
thorough passenger briefing is very important. Evacuation
of a seaplane causes a few problems not encountered with
the landplane. Location and operation of regular and emergency
exits should be known by all persons on board. The
pilot should assure that all passengers are familiar with
operations of seatbelts and shoulder harnesses, most especially
that all persons can UNFASTEN their own seatbelts
and shoulder harnesses in the event an accident occurs on
the water.
Before beginning any seaplane operation, it is especially
advisable to consider the existing and expected
water condition, and the wind speed and direction to determine
their combined effects on the operation.
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