Manual Blending of DIEGME Fuel Anti-Icing Additive
When the airplane is being refueled, use the following procedure to blend
anti-icing additive with fuels not already containing anti-icing additive:
1. Attach the additive to the refueling nozzle; ensure the blender tube
discharges into the refueling stream.
2. Begin refueling while simultaneously fully depressing and slipping the ring
over the trigger of the blender.
Procedure for Checking Fuel Additive Concentration Levels
Prolonged storage of the airplane will result in a buildup of water in the fuel
tanks which leaches out the additive. This condition is indicated by excessive
amounts of water accumulating in the fuel tank sumps. The concentration of
the additive may be checked using an anti-icing additive concentration test kit.
For additional information about this kit, refer to “Chapter 12” of the KODIAK
100 Airplane Maintenance Manual. It is imperative that the instructions for
the test kit be followed closely when checking the concentration level of
the additive. The additive concentration by volume for DIEGME must be
0.10% minimum and 0.15% maximum. When fuel is added to the tanks, the
concentration level must be a minimum of 0.10% by volume.
CAUTION:
• Diethylene Glycol Monomethyl Ether (DIEGME) is slightly toxic if
swallowed and may cause eye redness, swelling and irritation. It
is also combustible. Before using this material, refer to all safety
information provided on the container.
• Assure the additive is directed into the stream of owing fuel. The
stream of fuel must be started prior to beginning to add the anti-icing
additive, and the ow of additive must stop prior to stopping the ow of
fuel from the refueling nozzle.
• Do not allow the concentrated additive to come in contact with the
coated interior of the fuel tank or painted surfaces of the airplane.
• Do not use less than 20 uid ounces of additive per 156 gallons of fuel
or more than 20 uid ounces of additive per 104 gallons of fuel.
• If the fuel additive concentration falls below 0.035% by volume, the
airplane should be defueled and refueled with the proper concentration
level of anti-ice additive.
CAUTION: It is extremely important to attain the proper mixture ratio of
anti-icing within the fuel. A concentration in excess of that recommended
(0.15% maximum by volume) will result in detrimental effects to the
fuel tanks. Damage could occur to fuel system components, such as
deterioration of the protective primer and sealants and damage to the
o-rings and seals. Use only manufacturer-recommended blending
equipment to obtain proper proportioning.
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