RAZAIR
‐
A1
‐
METRO
‐
III
‐
AFM
‐
001
1
‐
34
3.
The
WATER
INJECTION
switch
must
be
placed
in
CONT.
4.
The
AWI
PUMP
TEST
switch
is
placed
in
either
the
No
1
or
No
2
position.
When
these
conditions
are
met,
the
AWI
fluid
will
flow
into
the
engines.
An
immediate
torque
increase
between
30%
to
35%
will
be
noticed
and
the
selected
AWI
PUMP
ON
light
will
illuminate.
AWI
fluid
flows
continuously
until
the
WATER
INJECTION
is
clicked
to
the
OFF
position,
the
AWI
PUMP
TEST
switch
is
placed
in
the
OFF
position,
the
AWI
fluid
runs
out
or
engine
rpm
decreases
below
90%
rpm.
AWI
flow
is
independent
for
each
engine,
so
if
the
flow
shuts
for
one
engine
it
will
continue
for
the
other
one
while
the
operating
conditions
are
met.
FUEL
SYSTEM
The
fuel
system
consists
of
the
fuel
storage
and
vent,
fuel
transfer
and
engine
feed,
and
indicating
systems.
The
total
usable
fuel
capacity
is
4,342
pounds
(648
US
gallons
at
6.7
pounds
per
gallon).
FUEL
STORAGE
The
fuel
storage
consists
of
two
integral
wet
‐
wing
tanks
and
a
vent
system
(Fig
58).
Fig.
58
Fuel
Storage
tanks.
FUEL
TRANSFER
AND
ENGINE
FEED
SYSTEM
Fuel
to
each
engine
is
supplied
by
an
independent
fuel
system
from
its
respective
wing
tank.
A
crossflow
line
interconnects
the
left
and
right
wing
tanks.
Each
fuel
tank
has
two
submerged
boost
pumps.
BOOST
PUMPS
The
boost
pumps
in
each
fuel
tank
re
controlled
by
the
L
BOOST
and
R
BOOST
switches
in
the
pedestal.
The
positions
of
these
rocker
switches
are
labeled
“MAIN”,
“OFF”
and
“AUX.”
Each
boost
pump
is
powered
from
tis
respective
28.5
DC
Volt
essential
bus.
NOTE
When
the
AWI
fluid
stops,
engine
torque
will
drop
by
as
much
as
35%.
