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Sensors for oil pressure and temperature indications are located on the forward side of the
oil tank. A chip detector is also mounted on the accessory gearbox in the scavenge oil
return line.
The engine oil system is monitored for oil temperature and oil pressure. The oil system
indications include analog pressure gauges, temperature and pressure digital readouts and
low oil pressure warning messages that are displayed on the EICAS primary page. Oil filter
impending bypass and chip detector indications are provided on the engine fault panel in the
aft equipment compartment.
During engine start, the oil pressure indications on the EICAS primary page are displayed
with an analog gauge and a digital readout. When both engines are started and oil pressure
is normal, the oil pressure gauges revert to N1 vibration gauges. The digital oil pressure
indication remains.
NOTE
The ENGINE OIL aural is inhibited when the engine is
shutdown on the ground. <0039>
Filling of the engine oil tanks is provided by a remote oil replenishment tank located in the aft
equipment compartment.
REV 56, Jan 31/03
Vol. 1 20--40--2
POWER PLANT
Oil System
Flight Crew Operating Manual MASTER
CSP A--013
Oil Distribution System --- Schematic
Figure 20---40---1
AIR OVERBOARD
VIA DRAIN MAST
IN
AGB
ASUMP
ENGINE
OIL
FAULT
PANEL
(AFT
EQUIPMENT
BAY)
LUBE AND SCAVENGE
PUMP ASSEMBLY
IMPENDING
BYPASS SWITCH
PUMP
RELIEF
VALVE
MASTER
CHIP
DETECTOR
SCAVENGE
DEAERATOR
RELIEF
VALVE
FUEL
OUT
FUEL OIL HEAT
EXCHANGER
EICAS DCUs
LOW
PRESSURE
SWITCH
P
P
P
P
P
AIR/ OIL
SEPARATOR
P
GRAVITY
SCAVENGE
B SUMP
SEAL AIR
SCAVENGE
C SUMP
SCAVENGE
SEAL
DRAIN
REPLENISHMENT
TANK
CONTROL
PANEL
(AFT EQUIPMENT BAY)
REMOTE OIL
REPLENISHMENT SYSTEM
PUMP
P
FILTER
TEMPERATURE
SENSOR
PRESSURE
TRANSDUCER
PRESSURE
SCAVANGE
LEGEND
GRAVITY
FILLER
OIL LEVEL
SENSOR
Vol. 1 20--40--3
REV 56, Jan 31/03
POWER PLANT
Oil System
Flight Crew Operating Manual
CSP A--013
MASTER
Oil System --- Oil Temp and Pressure EICAS Indications <MST>
Figure 20---40---2
<0006>
Oil Pressure Gauges
Indicates engine oil pressure.
Replaced by FAN VIB gauges
when both engines are
running and oil pressure is
above 24 psi.
Primary Page
L or G ENG OIL PRES
warning (red)
Indicates oil pressure is
less than 25 psi.
<0039>
ENGINE OIL
REV 56, Jan 31/03
Vol. 1 20--40--4
POWER PLANT
Oil System
Flight Crew Operating Manual MASTER
CSP A--013
A. Engine Oil Level Indication System
The engine oil level indication system provides a means of checking (from the flight
compartment) if the engine oil tanks are full at engine shutdown after flight. The level
indication system is operated on the ground as a post--shutdown checklist item. The
engine oil level panel is located on the pilots side console and consists of:
S Two, split legend, FAIL/REFILL lights
S START/STOP, split legend, switchlight.
NOTE
1. The engine oil tank level is verified within three minutes and 2
hours after shutdown.
2. For aircraft operations in excess of 16 operating hours (without
engine oil tank servicing), the engine oil level must be checked
from the flight compartment ENGINE OIL LEVEL panel.
Vol. 1 20--40--5
REV 56, Jan 31/03
POWER PLANT
Oil System
Flight Crew Operating Manual
CSP A--013
MASTER
Engine Oil Level Indicaton System
Figure 20---40---3
START Light (green)
Comes on to indicate
that the engine oil level
indication system self
test is initialized. START
light remains on until the
engine oil level check is
complete.
STOP Light (white)
Comes on, after 5
seconds, to indicate that
the engine oil level check
is complete and both
engine oil levels are
normal.
LH,RH REFILL Light
(amber)
Comes on to indicate that
the respective engine oil
level is low, 4543 cc (4.8
quarts US) or less.
LH,RH FAIL Light (amber)
Comes on to indicate
that, during the engine
oil level indication
system self check, the
respective engine oil
level sensor has failed.
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