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GX_17_032
BREATHER
DE-AERATOR OIL REPLEN
TANK
R R
REAR
BEARING
CHAMBER
FRONT
BEARING
CHAMBER
ACCESSORY
GEARBOX
PRESSURE
PUMP
PRESSURE
FILTER
FCOC
PRV
MCD MCD
PRV PRV
AIR
OVERBOARD
MCD
T
Differential
Pressure
Transducers
Strainer
Flow
Restrictor
VENT
VENT
VENT
VENT
Differential
Pressure Switch
Pressure
Valve
Pop-up
Indicator
Quantity
Transmitter
Magnetic Chip
Detector
Scavenge
Pump
OIL
TEMPERATURE
BULB
For Training Purposes Only
Sept 04
17-15
P I LOT T R A I N I N G GU I D E
POWER PLANT
ENGINE OIL HEAT MANAGEMENT SYSTEM
The cooling is achieved by the Fuel Cooled Oil Cooler (FCOC). The oil cooler
dissipates the engine oil system heat by exchanging heat between engine lubricating
oil and low pressure fuel. It also warms the low temperature fuel to prevent the
formation of ice particles in the fuel entering the Fuel Metering Unit (FMU).
GX_17_033
LP
PUMP
FCOC
LP
FILTER
FUEL
FLOW TX
HP
FILTER
HP
PUMP
ENGINE
GEARBOX
FMU
T T
Temperature
Probe
TO
SCAVENGE
TO FUEL
NOZZLES
HP
OIL
FEED
AIRPLANE
FUEL
SUPPLY
17-16 For Training Purposes Only
Sept 04
P I LOT T R A I N I N G GU I D E
POWER PLANT
OIL REPLENISHMENT SYSTEM
Each engine oil tank capacity is 13.6 U.S. quarts (12.86 liters). Engine oil level is
measured using a sensor (oil probe) which is located in the engine oil tank and
provides quantity information on the STATUS display.
An oil replenishment tank is located in the aft equipment bay and contains an electrical
pump and sensor probe for quantity level. The oil replenishment tank volume contains
6 U.S. quarts (5.7 liters). The oil replenishment system is designed for ground use only
and serves both main engines and the APU.
The system can be operated using the battery or external electrical power. Oil level
monitoring is required during servicing the engine(s) to verify that the system stops
when the full level is reached. It is recommended to stop replenishment manually
when gauge reads 11.0 quarts.
The oil filling system is operated through the oil replenishment panel located behind
the pilot’s seat in the flight compartment. The panel will display all lights for a period
of three seconds when the panel is powered up.
Each engine may be replenished individually if:
• Both engines are shut down
• The engine to be replenished has been shut down for a minimum of 5 minutes and
to a maximum of 30 minutes
GX_17_034
OIL QTY (QTS)
ENG
APU
RES
12 . 3 12.3
5.0
3.2
Engine
Oil Tank
Engine
Oil Tank
For Training Purposes Only
Sept 04
17-17
P I LOT T R A I N I N G GU I D E
POWER PLANT
• To replenish the APU it has to have been shut down for a minimum of 15 minutes
• The engine to be replenished is not already full
• One of the other engines or APU is not currently being replenished
• The aircraft has Weight on Wheels (WOW)
OIL REPLENISHMENT PANEL
OIL REPLENISHMENT
RESERVOIR
TANK
LO
PUMP
ON
LH ENG APU RH ENG
POWER
SYSTEM
ON
LO
OIL
LO
OIL
LO
OIL
VLV
OPEN
VLV
OPEN
VLV
OPEN
GX_17_035
LO OIL LH ENG (right engine similar)
The LO OIL comes on to indicate that
the engine is low in oil quantity and
will remain on until the engine oil tank
is replenished.
SYSTEM ON
Selecting the POWER switch does the
following:
• The SYSTEM ON lamp will come on.
• A three lamp test will be carried out
on all annunciators.
TANK LO
The reservoir TANK LO legend comes
on to indicate that the reservoir is low
in quantity.
PUMP ON
The PUMP ON lamp will come on to indicate
operation. The legend will remain on until the
correct level of the system to be topped up is
achieved.
VLV OPEN RH (left engine similar)
Selecting the switch will illuminate the
VLV OPEN switch legend indicating
valve operation. Oil will be pumped from
the reservoir (through the valve) to the
engine until full is achieved.
• The VLV OPEN and LO OIL switch
legends will go out when the correct
level is reached.
　
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