(2)  
EICAS provisions include two cathode-ray tube (CRT) display screens on the pilot's center instrument panel P2, a display select panel on the forward electrical control stand P9, and an EICAS maintenance panel on the right side panel P61. EICAS displays primary engine parameters on the upper CRT. Warning, caution, and advisory messages also appear on the upper CRT during certain system malfunctions. Aural tones occur in the flight deck with each of the above types of messages. Two other types of messages may also appear, status or maintenance. These two types of messages both appear on the lower CRT only when called upon by an operator. Status messages display data on the current status of operation and may be called upon by selecting the STATUS switch on the display select panel. The airplane may be either inflight or on the ground. Maintenance messages are available only on the ground by selecting the ECS/MSG switch on the EICAS MAINT panel. Current maintenance information is usually displayed unless a recorded page is called up. A recorded page is a page with information about the status of the system inflight when certain failures occurred. These are called AUTO EVENTS and are called up by selecting the AUTO EVENT READ switch on the EICAS MAINT panel.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

SEEE SEEA SEE B
SEE F SEE D
COMPARTMENT TEMPERATURE INDICATION
SEE C
COMPT TEMP
INOP INOP INOP
FLT DK FWD CAB AFT CAB AUTO AUTO AUTO
C  OFF  W  C  OFF  W  C  OFF  W 
RECIRC FAN 
TRIM AIR  L  R 
ON  ON  ON 
OFF  INOP  INOP 
WARNING  ENGINE 
&  PRIMARY  RESET L PACK  R PACK RESET 
CAUTIONS  DISPLAYS 
INOP  INOP 
PACK  PACK 
OFF  OFF 
AUTO  AUTO 
OFF  N  OFF  N 
S  S 
(UPPER CRT DISPLAY)  B TC  B TC 
Y  Y 
W  W 

(LOWER CRT DISPLAY) AIR CONDITIONING CONTROL PANEL (PILOT'S OVERHEAD PANEL P5)
A
ENGINE SECONDARY
OR
STATUS DISPLAY

EICAS MAINT DISPLAY SELECT
EVENT
AUTO MAN
OR
READ
ELECECS PERF
MAINTENANCE
HYDMSG APU
DISPLAY
REC ERASE
TEST
ENG MCDP
CONF EXCD
EICAS DISPLAY SCREENS (REF)
B  EICAS MAINTENANCE PANEL (REF)
C
ECS Control and Indication Figure 2 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

EICAS DISPLAY SELECT PANEL
(FORWARD ELECTRICAL CONTROL STAND P9)

EQUIPMENT COOLING
TEST SWITCH
(RIGHT SIDE PANEL P61)

ECS Control and Indication
Figure 2 (Sheet 2)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 AIR CONDITIONING - GENERAL - MAINTENANCE/PRACTICES
__________________________________________________
 1.  General_______
 A.  This procedure has instructions on how to supply the conditioned air to the airplane while the airplane is on the ground. You can supply the conditioned air by the packs or by a ground cart.
 B.  It is recommended that conditioned air to cool the airplane on the ground be supplied from a ground conditioned air source, when practical, as an alternative to conditioned air from the air conditioning packs. Refer to 757-SL-21-051 for more data about this maintenance practice.
　
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