曝光台 注意防骗
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on the BLEED AIR Panel.
The systems advisory, caution and warning messages are displayed on the EICAS
Primary and Status Page. The 10th-stage bleed air pressure readouts are displayed on
the Status Page (see Figure 19-7).
BLEED AIR Panel
BLEED AIR Panel
Figure 19-6
NORM
LOOP A
LOOP B
DUCT
MON
10TH STAGE
14TH STAGE
DUCT
FAIL
CLOSED
OPEN
DUCT
FAIL
CLOSED
APU LCV
FAIL
OPEN
ISOL
OPEN
L
DUCT
FAIL
CLOSED
R
DUCT
FAIL
CLOSED
BLEED AIR
LOO
LO
L ISOL R
TEST
P604_19_008
14TH-STAGE ISOL
Switch/Light
Push
OPEN Light
Illuminated
– Opens or closes
14th-stage bleed air
isolation valve.
– Indicates
the 14th-stage bleed air
isolation valve is open.
DUCT MON Selector
(Spring-loaded to NORM)
TEST
NORM
LOOP A
LOOP B
– Tests 10th-stage,14th-stage
and anti-ice sensing elements for
continuity by simulating a bleed air
leak.
– Normal selector position
– Test 10th-stage Loop A
sensing elements for short conditions.
– Tests 10th-stage Loop B
sensing elements for short conditions.
14TH-STAGE L and R Switch/Lights
(alternate-action)
Push
CLOSED Light
Illuminated
DUCT FAIL Light
Illuminated
– Opens or closes respective
14th-stage bleed air shutoff valve.
– Indicates the respective
14th-stage bleed air shutoff valve is
closed.
– Indicates a bleed air leak
in the respective 14th-stage duct.
10TH-STAGE L and R Switch/Lights
(alternate-action)
Push
CLOSED Light
Illuminated
DUCT FAIL Light
Illuminated
– Opens or closes respective
10th-stage bleed air shutoff valve.
– Indicates the respective
10th-stage bleed air shutoff valve is
closed.
– Indicated a bleed air
leak in the respective 10th-stage duct.
10TH-STAGE ISOL Switch/Light
(alternate-action)
Push
OPEN Light
Illuminated
– Opens or closes 14th-stage
bleed air isolation valve.
– Indicates the 14th-stage
bleed air isolation valve is open.
APU LCV Switch/Light
(alternate-action)
Push
OPEN Light
Illuminated
FAIL Light
Illuminated
– Opens or closes the APU Load
Control Valve (LCV).
– Indicates the APU LCV
is open.
– Indicates APU LCV has
stuck open when commanded closed
by the interlock protection.
PNEUMATIC SYSTEM
19-12 For Training Purposes Only
May 03
P I LOT T R A I N I N G GU I D E
EICAS STATUS Page
EICAS STATUS Page - Bleed Pressure Readouts
Figure 19-7
EICAS Messages
MESSAGE MEANING AURAL WARNING
(IF ANY)
L 10TH DUCT
Bleed air leak in the respective 10th-stage ducting. “BLEED AIR DUCT”
R 10TH DUCT
L 14TH DUCT
Bleed air leak in the respective 14th-stage ducting. “BLEED AIR DUCT”
R 14TH DUCT
ANTI-ICE DUCT Bleed air leak in the fuselage or wing anti-ice ducting. “ANTI-ICE DUCT”
APU LCV FAIL APU load control valve has failed in the open position with APU LCV interlock
activated.
DUCT TEST OK Bleed air leak detection systems passed self-test.
LOOP A TEST OK
The respective 10th-stage duct overheat loop circuit has passed self-test.
LOOP B TEST OK
EICAS Messages
Table 19-1
R 10th-Stage
Bleed Pressure
Readout
L 10th-Stage
Bleed Pressure
Readout
P604_19_009
Description
L and R 10th-Stage
Bleed Pressure Readout
Symbol
45
- - -
Condition
Indicates the pneumatic supply pressure available for operation
of air conditioning system or main engine starts
Invalid data
CABIN TEMP
BLEED PRESS
FUEL TEMP
ENGINE
BULK
OXY
C ALT
RATE
P
45
20
45
100 90
2000
100
0.0
0.0
APU
100 430
RPM EGT
DUCT TEST OK
SPOILERS
100
Table of Contents
For Training Purposes Only
May 03
18-i
P I LOT T R A I N I N G GU I D E POWER PLANT
Introduction .......................................................................................................................18-1
Flat-Rated Thrust ..............................................................................................................18-1
Engine Construction..........................................................................................................18-2
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