Mil-1-27686 Jet Fuel Anti-Icing Inhibitors; Biobor Jf (Biocide) - Piper Cheyenne IIIA Airplane Maintenance Manual

PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL
E. MIL-1-27686 Jet Fuel Anti-icing Inhibitors
The MIL-1-27686 Jet Fuel Anti-Icing Inhibitor, primarily is an anti-icing agent, however it also has
excellent microbiological sludge deterrent characteristics. It is very soluble in water, and only slightly
soluble in fuel, which mandates that the blending with fuel be accomplished in a precise manner.
Such a device permits injection of the agent into a flowing stream of fuel to ensure even disbursement.
When blending the additive, the concentration should not be less than 0.10 percent or more than 0.15
percent by volume. Except for the information contained herein and in the Pilot's Operating
Handbook, the manufacturer's mixing or blending instructions should be carefully followed.
CAUTION: ASSURE THAT THE ADDITIVE IS DIRECTED INTO THE FLOWING FUEL STREAM.
THE ADDITIVE FLOW SHOULD START AFTER AND STOP BEFORE THE FUEL
FLOW. DO NOT PERMIT THE CONCENTRATED ADDITIVE TO COME IN CONTACT
WITH THE AIRCRAFT PAINTED SURFACES OR THE INTERIOR SURFACES OF THE
FUEL TANKS.
CAUTION: SOME FUELS HAVE ANTI-ICING ADDITIVES PREBLENDED IN THE FUEL AT THE
REFINERY, SO NO FURTHER BLENDING SHOULD BE PERFORMED.
CAUTION: THIS ADDITIVE SHOULD NOT BE USED AS A REPLACEMENT FOR PREFLIGHT
DRAINING OF THE FUEL SYSTEM DRAINS.
F. Biobor JF (Biocide)
Biobor JF is not an anti-icing agent and is intended to be used specifically as a fuel biocide. The
compound is an extremely efficient biocidal agent and is soluble in the fuel as well as water. Biobor JF
disperses throughout the entire fuel system to even the most remote areas soon after introduction into
the fuel system. This compound is used as a periodic treatment in concentrations of 135 ppm when
the airplane has been operated in an environment conductive to contamination or when evidence of
such contamination is found. Biobor JF may also be used in maximum concentrations of 270 ppm as
a single dose shock treatment to clean out and sterilize a very contaminated system. Biobor JF is not
volatile and may remain in the tank until the fuel is used.
The preferred method of introducing Biobor JF into the fuel is by injection through a metering device.
If no metering device is available, blending may be accomplished by batch blending or by over-the-
wing blending while filling the tanks. When one half the required quantity of fuel has been added,
gradually introduce the compound directly into the stream of fuel while the remaining one half of fuel is
added. Complete mixing is necessary depending on the severity of the contamination. It must be
used at a high enough concentration to kill, not control the infestation. When used only periodically, it
must be used often enough to contact the entire surface of the fuel tank interiors and remain in contact
up to 72 hours to effect the kill. An airplane which has been treated and flown, should be retreated at
consecutive fills so that a 72 hour contact time is accomplished.
CAUTION: IT IS IMPERATIVE THAT ALL MANUFACTURER'S INSTRUCTIONS BE FOLLOWED
WHEN USING THESE PRODUCTS
EFFECTIVITY:
040-999
12-10-00
Jan