Beechcraft C-12C Operator And Technical Reference Manual page 144

TM 1-1510-218-10
Anti-icing and Biocidal Additive for Commercial Turbine Engine Fuel – The fuel system icing
inhibitor shall conform to MIL-I-27686.
functions as a biocide to kill microbial growths in aircraft fuel systems. Icing inhibitor conforming
to MIL-I-27686 (PRIST) shall be added to commercial fuel, not containing an icing inhibitor, during
refueling operations, regardless of ambient temperatures.
accomplished in accordance with accepted commercial procedures.
Table 2-14. Approved Military Fuels, Oil, Fluids, and Unit Capacities
SYSTEM
Fuel
Engine Oil
Hydraulic brake reservoir
Hydraulic landing gear reservoir*
Oxygen
Toilet Chemical
D2 T
MIL-L-23699 oil, used in engine oil system, is authorized and directed for use. Do not mix different
brands or types of oil when adding oil between changes. Different brands or types of oil may be
incompatible due to the differences in chemical structure.
ENGINE ARMY STANDARD
PT6A
* Maximum operating hours with indicated fuel between engine overhauls (TBO).
2-105. USE OF FUELS.
a. Fuel Use Limitations. There is no special
limitation on the use of Army standard fuel, but certain
limitations are imposed when alternate or emergency
fuels are used. For the purpose of recording, fuel
mixtures shall be identified as to the major component
of the mixture, except when the mixture contains
leaded gasoline. The use of any fuels other than
standard will be entered in the FAULTS/REMARKS
column of DA Form 2408-13-1, Aircraft Maintenance
and Inspection Record, noting the type of fuel,
additives, and duration of operation.
b. Use Of Kerosene Fuels.
kerosene fuels (JP-5 type) in turbine engines dictates
2-128
The additive provides anti-icing protection and also
SPECIFICATION
MIL-T-5624 (JP-5 and JP-8)
MIL-L-23699
MIL-H-5606
MIL-H-5606
MIL-O-27210
Monogram DG-19
Table 2-15. Standard, Alternate, and Emergency Fuels
ALTERNATE FUEL
FUEL
MIL-T-5624 MIL-T-5624
Grade JP-8 Grade JP-5
The use of
NOTE
Refueling operations shall be
544 U.S. Gallons usable
14 U.S. Quarts per engine
1 U.S. Pint
8 U.S. Quarts
49 Cubic feet
3 Ounces
NOTE
TYPE
MIL-G-5572
Any AV Gas
the need for observance of special precautions. Both
ground starts and air restarts at low temperature may
be more difficult due to low vapor pressure. Kerosene
fuels have a freezing point of minus 40 °C (-40 °F) and
limit the maximum altitude of a mission to 28,000 feet
under standard day conditions.
c. Mixing Of Fuels In Aircraft Tanks. When
changing from one type of authorized fuel to another,
for example JP-8 to JP-5, it is not necessary to drain
the aircraft fuel system before adding the new fuel.
d. Fuel Specifications. Fuels having the same
NATO code number are interchangeable. Jet fuels
conforming to ASTM D-1655 specification may be
used when MIL-T-5624 fuels are not available. This
CAPACITY
EMERGENCY FUEL
*MAX.
HOURS
150