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90% displayed RPM.
GF0510_004
The "APU" label and digital readout
CKPT (°C) FWD
CABIN (°C)
AFT
CABIN (°C)
20
90
22
20
22
20
1300
0.00
000
OXYGEN 000
CAB ALT
P
CAB RATE
LDG ELEV
19
%
OIL QTY (QTS)
ENG
APU
RES
10.4
4.5
5.0
10.4
APU
RPM 100 EGT 650
BRAKE TEMP
03 03 03 03
The oil quantity digital readout will turn amber when the “APU OIL LO QTY” message is displayed.
AUXILIARY POWER UNIT
REV 41, Jul 08, 2004 Flight Crew Operating Manual
CSP 700−6
Volume 2
05−10−5
OIL REPLENISHMENT SYSTEM (CONT'D)
Oil Replenishment System Filling
The system can be operated using the battery or external electrical power. Oil level monitoring is
required during servicing to verify that the system stops automatically when the full level is
reached.
NOTE
To protect against overfilling due to system component failures
maintenance instructions must be followed according to the Airplane
Maintenance Manual.
The oil filling system is operated through the oil replenishment panel located on bulkhead 280 (left
side behind the pilot’s seat) in the flight compartment.
NOTE
1. A reservoir TANK LO light remaining on three seconds following
panel powerup
indicates that the reservoir is low. Under this
condition, refilling
is inhibited until the reservoir is filled.
2. If a low oil replenishment condition occurs during a fill, the system
will shut down.
Oil is to be added to the APU when the “APU OIL LO QTY” advisory message is on EICAS and
the LO OIL for APU display is shown on the oil replenishment panel.
The switch legends on the oil replenishment panel can only be displayed when the SYSTEM ON
switch is selected.
The APU may be replenished if:
· The APU has been shut down for a minimum of 15 minutes.
· The APU is not already full.
· Both engines are not running and one of the other engines is not currently being
replenished.
AUXILIARY POWER UNIT
Flight Crew Operating Manual REV 41, Jul 08, 2004
CSP 700−6
Volume 2
05−10−6
OIL REPLENISHMENT PANEL
GF0510_005
SYSTEM ON
Selecting the POWER switch does the
following:
The SYSTEM ON legend illuminates.
A three second 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.
VLV OPEN (APU)
PUMP ON
Selecting the PUMP ON switch does the
following:
The reservoir pump will operate and the PUMP
ON legend will come on to indicate operation.
The legend will remain on until the correct level
of the system to be topped up is achieved.
LO OIL (APU)
The LO OIL legend
comes on to indicate
that the APU is low in
oil quantity and will
remain on until the
APU oil tank is
replenished.
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.
OIL REPLENISHMENT
POWER
RESERVOIR LH ENG APU RH ENG
SYSTEM
ON
TANK
LO
PUMP
ON
LO
OIL
VLV
OPEN
LO
OIL
VLV
OPEN
LO
OIL
VLV
OPEN
Operation
The following procedural steps outlined are to be used only as a guide to replenish the APU oil
system. The Airplane Maintenance Manual takes precedence over all servicing procedures.
· Confirm that the “LO OIL” lamp on the oil replenishment panel corresponds to the condition
indicated on EICAS “APU OIL LO QTY” advisory message.
· Select the switch labeled “APU” on the oil replenishment panel.
· Confirm that the “PUMP ON” (below reservoir label) and “VLV OPEN” (below the APU label)
legends are displayed on the oil replenishment panel.
· Select the “POWER” switch on the oil replenishment panel, “SYSTEM ON” legend on.
· Monitor the oil level on EICAS for both the APU and reservoir (example: if approximately 1
liter or 1 US quart is added to the APU, the oil replenishment tank level should have reduced
by the same amount).
· When the APU reaches its designed level (between 4.5 and 5.5 qts.) confirm that the
　
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