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PRODUCT DATA
JANUARY 2003
ENGINE MOUNTED ACCESSORIES
ENGINE FUEL PUMP
The dual element fuel pump is mounted
on the right rear accessory gearbox drive
pad. The drive shaft includes an integral
seal runner for the carbon ring seal. Pump
RPM is 4205 at 100% NG. Output volume
i s a p p r o x i m a t e l y 4 . 5 G P M . F u e l f i r s t
reaches a centrifugal “liquid ring” boost
pump. Boost pump output, called PBF
(pressure before filter), flows out to the
gearbox mounted filter. It returns to the
inlet of the high pressure gear pump as PAF.
Gear pump high pressure output (PF) is
directed to the metering valve, the pressure
differential (metering head) regulator valve,
and the manual control components. A
pressure relief valve limits pump output
p r e s s u r e t o 9 0 0 P S I a b o v e p u m p i n l e t
pressure.
The NG and NP speed pickups are the
same as existing series IV designs, except
with new connectors. Both sensors are
located on top of the gearbox housing.
TORQUE METER OIL
PRESSURE SENSOR
T h e s e n s o r s i g n a l i s u s e d f o r t o r q u e
limiting. It is tied in at the current TMOP
l o c a t i o n p r o v i d e d f o r a i r c r a f t t o r q u e
sensing on the accessory gearbox.
The ignition exciter is a solid-state, high
energy ignition unit. The unit is designed
to have a constant spark rate of 300 to 330
s p a r k s p e r m i n u t e t h r o u g h o u t i t s
operational temperature and voltage range.
The exciter is energized when either :
•the PLA is greater than 9% and NG is
between 5% and 50%
•the anti-ice is selected
•a flameout is detected
IGNITION EXCITER
The PMA is driven by the power turbine gear
train at 4410 RPM on the C40 engine. It is
m o u n t e d o n t h e l e f t r e a r d r i v e p a d . I t
provides the primary electrical power to the
ECU above 85% NP.
PERMANENT MAGNET
A LTERNATOR
The T1 sensor is mounted in the airframe
inlet plenum. It is mounted so as to provide
the best possible correlation to the actual
engine air temperature, while providing
for suitable protection against foreign
object damage and ice build up.
COMPRESSOR INLET AIR
TEMPERATURE SENSOR T1
SPEED PICKUP SENSORS
The fuel filter is combined with the oil filter
into a single assembly. The assembly is
remotely mounted to the lower left rear side
o f t h e g e a r b o x . T h e d i s p o s a b l e , n o n -
c l e a n a b l e f u e l e l e m e n t i s r a t e d a t 2 5
microns. A bypass valve across the element
is set at 3 to 3.4 psid. An impending bypass
i n d i c a t o r w i l l v i s u a l l y e x t e n d f r o m a n
assembly attached to the filter assembly
housing at 2.1 to 2.9 psid. The button is
manually reset.
ENGINE MOUNTED FUEL/OIL
FILTER [COMBINED ENGINE
FILTER ASSEMBLY-CEFA]
Summary of Contents for BELL 430
Page 1: ...Product Data ...