hydrocarbon
crystals, and
finally to a nearsolid block of
hydrocarbon
wax. Because
the freezing
point is
defined as the
temperature at
which the last
wax crystal
melts, the
freezing point
of jet fuel is
well above the
temperature
at which it
completely
solidifies.
Boeing has
developed
the Fuel
Temperature
Prediction
Program (FTPP)
for the 777 and
is developing
FTPPs for
other airplane
models. The
FTPP assists
operators in
addressing
fuel freezing
point concerns
during the
flight planning
process.
The program
intended to
interface with or
be incorporated
into an airline’s
flight planning
system. The
FTPP for the
777 has been
POLAR OPERATIONS
OFFERS NEW OPPORTUNITIES
calibrated with
probe. Details
flight-test data
on FTPPs
obtained by
are available
Boeing and
to airlines
several airlines.
through Boeing
The data are
Field Service
based on fuel
representatives.
temperature
Measuring
indicated by
the actual
the fuel tank
freezing point
temperature
6| FlyUAA| www.FlyUAA.org| September Issue
of the fuel being
uplifted can
be a valuable
step in the
flight planning
process for
flights during
which fuel
freezing point
is a concern. In
general, actual
fuel freezing
points tend
to be about
3°C below the
specification
maximum
requirement.
Details on
measuring the