King Air C90GTi, Руководство по подготовке пилотов

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In an overspeed condition, the N
1
gover nor
allows the P
3
pressure to be reduced in the
FCU, which repositions the metering valve
reducing the fuel flow into the combustion
chamber, decreasing N
1
.
Should the P
3
air pressure be lost, due to a
malfunction, the metering valve will be po-
sitioned to the minimum flow stop. Minimum
f l ow p owe r wo u l d b e a p p r ox i m a t e ly 4 8 %
N
1
. T h e p owe r l eve r a n d c o n d i t i o n l eve r
would then have no effect on engine speed.
FUEL PRESSURE INDICATORS
In the event of an electric boost pump fail-
ure, the respective FUEL PRESS annunci-
ator (Figure 7-18) will illuminate and the
master war ning light will flash. The FUEL
PRESS light illuminates when outlet pres-
s u r e a t t h e b o o s t p u m p d e c r e a s e s b e l ow
about 10 psi. If the crossfeed switch is in the
AU TO p o s i t i o n , t h e a u t o m a t i c c r o s s f e e d
feature will open the valve extinguishing
the annunciator.
In the event of an engine-driven fuel pump
( h i g h - p r e s s u r e ) f a i l u r e , t h e e n g i n e w i l l
flame out.
Engine operation with the FUEL
P R E S S l i g h t o n i s l i m i t e d t o t e n
h o u r s b e t we e n ov e r h a u l o r r e -
p l a c e m e n t o f t h e e n g i n e - d r iv e n
high-pressure fuel pump.
FUEL FLOW INDICATORS
Fuel flow infor mation is sensed by a trans-
m i t t e r i n t h e e n g i n e f u e l s u p p ly l i n e , b e -
tween the boost pump and the engine-driven
high-pressure pump, and indicated on the
fuel flow section of the Engine Indicating
System (EIS) is in (Figure 7-19). The indi-
cation of fuel flow is in pounds-per-hour.
CAUTION
KING AIR C90GTi/C90GTx PILOT TRAINING MANUAL
7-19
FOR TRAINING PURPOSES ONLY
7
POWERPLANT
Figure 7-19. Fuel Flow Indicator
Figure 7-18. Fuel Pressure Annunciators