Daher-Socata TBM 900 Pilot's Information Manual page 484

PILOT'S OPERATING HANDBOOK
Fuel additives
Fuel used must contain an anti-ice additive conforming to MIL-I-27686 or MIL-I-85470 specification.
Strict adherence to recommended preflight draining instructions as called for in Section 4 will eliminate any free
water accumulations from the tank sumps. While small amounts of water may still remain emulsified in the
gasoline, it will normally be consumed and go unnoticed in the operation of the engine.
One exception to this can be encountered when operating under the combined effect of use of certain fuels, with
high humidity conditions on the ground followed by flight at high altitude and low temperature. Under these unusual
conditions, small amounts of water emulsified can precipitate from the fuel stream and freeze in sufficient
quantities to induce partial icing of the engine fuel system.
While these conditions are quite rare and will not normally be a problem to owners and operators, they do exist in
certain areas of the world and consequently must be dealt with, when encountered.
Therefore, to alleviate the possibility of fuel icing occurring under these unusual conditions, it is required to add an
ethylene glycol monomethyl ether (EGME or DIEGME) compound to the fuel supply.
The introduction of an EGME or DIEGME compound into the fuel provides two distinct effects :
- it absorbs the dissolved water from the fuel
- alcohol has a freezing temperature depressant effect.
EGME or DIEGME must be carefully mixed with the fuel in concentration, it must be between a minimum of 0.06 %
and a maximum of 0.15 % by volume. Figure 8.7.3 provides EGME or DIEGME / fuel mixing ratio information.
DO NOT PERMIT THE CONCENTRATE OF EGME OR DIEGME TO COME IN CONTACT
MIXING OF THE EGME OR DIEGME WITH THE FUEL IS EXTREMELY IMPORTANT. AN
EXCESSIVE CONCENTRATION (GREATER THAN 0.15 % BY VOLUME MAXIMUM) WILL
RESULT IN DETRIMENTAL EFFECTS TO THE FUEL TANKS BY DETERIORATION OF
PROTECTIVE PRIMER, SEALANTS AND SEALS OF SYSTEM AND ENGINE
COMPONENTS. USE ONLY BLENDING EQUIPMENT RECOMMENDED BY THE
Prolonged storage of the airplane will result in a water buildup in the fuel which "leeches out" the additive. An
indication of this is when an excessive amount of water accumulates in the fuel tank sumps. The concentration can
be checked using a differential refractometer. It is imperative that the technical manual for the differential
refractometer be followed explicitly when checking the additive concentration.
Fuel and fuel additives in Ukraine and CIS countries
It is possible to use kerosene GOST 10227 RT with addition of anti-icing liquid :
liquid "И" --- GOST 8313--- 88
-
Above-mentioned liquid is added in the quantity equal to 0.3 percent per volume.
REFER TO SERVICE BULLETIN P & WC No. 14004 AT ITS LATEST REVISION FOR
Edition 0 -- October 31, 2013
Rev. 1
WITH THE AIRPLANE FINISH OR FUEL TANK
MANUFACTURER TO OBTAIN PROPER PROPORTIONING.
APPROPRIATE QUANTITIES
HANDLING, SERVICING AND MAINTENANCE
CAUTION
CAUTION
SECTION 8
Page 8.7.3