FUEL
UMITS
(CONT)
ELECTRONIC FUEL COMPUTER SPECIFIC GRAVITY
'CAUTION
I~
Engine surge may occur
if
the recommended specific
gravity adjustment
is
not adhered
to
for the type of
fuel
being used. If surge
is
encountered, refer to the Engine
Maintenance Manual.
A decrease in the
speCific
gravity setting, on the
fuel
I
computer, without a change
in
fuel
specific gravity, re-
sults
in
higher turbine temperatures
in
start, accelera-
tion and deceleration.
The engine electronic
fuel
computer must be adjusted to the recommended
specific gravity setting
in
the Engine Log Book for the type of
fuel
being
used. If
no
entry
is
made
in
the Engine Log Book, the following settings
must be observed: I
• Jet
A,
Jet A-I, JP-5 and JP-8 .......................................... Position 5
•
Jet
Band
JP-4 ............................................................... Position 6
• 50% or more Aviation Gasoline ....................................... Position 7
Fuel adjustment knob may be rotated
one
"click" either
direction from the recommended
fuel
adjustment of
positions 5, 6 and 7
to
compensate for individual en-
gine characteristics or installation effects.
-~
Due to
fuel
computer accessibility,
fuel
computer
Refer to Addendum -
FUEL
SERVICING
for adjustment procedures. I
~,.
specific gravity adjustment
is
not considered a normal
pilot function.
FAA
APPROVED
4-30-76
REISSUED
2-25-81,
CHANGE
12
1-21
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