MlL-STD-1518E
5.5.2.1 Bulk storage tank. Blending additives into bulk airfield tanks can be done by pouring the required quantity of additive into the tank heel followed by the receipt. The required quantity of additive may also be added to delivery tank trucks prior to unloading these trucks into the bulk system. ln the case of static dissipator additive, typically an 8,000 gallon tank truck requires approximately 30 ml of the neat additive.
5.5.2.2 Product tanks of refueling trucks. Blending into the product tank of refueling trucks can be performed by introducing the required amount through the top hatch using a funnel and a length of hose with one end submerged below the surface of the fuel. This is best done filling the product tank approximately one third full, pouring the additive via the funnel, and then filling the product tank to capacity. Wait approximately 10 minutes and then circulate at least 100 percent of the product before servicing to aircraft. lf additives are put into a full refueler, circulate at least 150 percent of the refueler capacity prior to issue.
5.5.2.3 Adding FSll to tanks. FSll shall not be added to fuel in either bulk storage or refueling truck product tanks. FSll will not blend properly into fuel using hand-doping techniques. lmproperly blended FSll can cause damage to aircraft fuel tanks. Damage to fuel storage tanks and handling equipment may also occur.
5.5.2.4 Adding FSll during refueling. lf authorized, FSll may be added using the 590 ml (20 ounce) aerosol can during overwing (gravity) refueling. This is typically the commercial FSll additive, PRlST, used with commercial jet fuel (JET A/JET A-1). PRlST is equivalent to the military FSll additive. lf authorized for use, determine the fuel load and calculate the amount of additive required. lt shall be
added gradually during filling to permit proper blending in the fuel. One can aerosol additive will treat 840 liters (222 gallons) of fuel to 0.07 percent by volume. Contact the applicable military Service Control
Point for authorization to use aerosol cans of FSll as fuel is pumped into the aircraft. lt is possible to over treat fuel with FSll by this technique. Fuel that has been over treated will cause damage to aircraft fuel tanks.
5.5.2.5 PRlST restriction PRlST dispensed in aerosol can is not permitted with US Navy aircraft.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 lntended use. The purpose of this standard is to ensure government aircraft are provided specification fuel, lubricating oils, and hydraulic fluids at aircraft maintenance facilities where a US Government Contract is in force.
6.2 Acquisition requirements. Acquisition documents must specify the following:
a. Title, number, and date of this standard.
b. When this standard is used in acquisition, the applicable issue of the DoDlSS must be cited in the solicitation (see 2.2.1 and 2.3).
6.3 Subject term (key word) listing.
Additive blending
Fuel equipment
Quality assurance requirements
Fuel System lcing lnhibitor (FSll)
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