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• D–TO 2 – derate two assumed temperature derated takeoff thrust
• CLB - maximum rated climb thrust
• CLB 1 - derate one climb thrust
• CLB 2 - derate two climb thrust
• CON - maximum rated continuous thrust
• CRZ - maximum rated cruise thrust
• GA - maximum rated go-around thrust
3 Assumed Temperature
Displayed (green) – selected assumed temperature (degrees C) for reduced thrust
takeoff.
2
PRIMARY EICAS DISPLAY
1 TAT +15C D-TO1 +38C 3
December 01, 1999
747 Operations Manual
Engines, APU -
Primary Engine Indications
Copyright © The Boeing Company. See title page for details.
D6-30151-425 7.10.3
N1 Indications
Note: When reverse thrust activated, the following indications are not displayed:
• command N1
• reference N1
1 Thrust Reverser Indication
Displayed REV (amber) – reverser in transit.
Displayed REV (green) – reverser fully deployed.
2 N1
Digital N1% RPM displayed:
• (white) – normal operating range
• (red) – operating limit reached
3 Maximum N1 Line
Displayed (amber).
4 N1 Indication
N1 RPM, displayed:
• (white) – normal operating range
• (red) – operating limit reached
95 95 95
40 768 768 768
REV
2
2 2 2
N1
5
7
8
2
1
3
4
6
PRIMARY EICAS DISPLAY
December 01, 1999
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
7.10.4 D6-30151-425
Engines, APU -
Primary Engine Indications
5 Reference N1
Displayed (digital, green) - reference thrust selected by FMC.
6 N1 Red Line
Displayed (red) – N1 RPM operating limit.
7 Reference N1 Indicator
Displayed (green) – reference N1.
Displayed (magenta) – target N1 commanded by FMC.
8 Command N1 Indicator
Displayed (white) – N1 RPMcommanded by thrust lever position.
December 01, 1999
747 Operations Manual
Engines, APU -
Primary Engine Indications
Copyright © The Boeing Company. See title page for details.
D6-30151-425 7.10.5
EGT Indications
1 EGT
EGT (degrees C), displayed:
• (white) – normal operating range
• (amber) – continuous limit reached
• (red) – start or takeoff limit reached
Note: Indication remains white during TO or GA for five minutes (or tenminutes
if one engine fails or is shut down) even though continuous EGT limit is
reached.
2 EGT Red Line
Displayed (red) – takeoff EGT limit.
3 EGT Start Limit Line
Displayed (red):
• with Fuel Control switch in CUTOFF
• until engine reaches idle
4 EGT Amber Band
Displayed (amber) – continuous EGT limit.
662 662 57 662
EGT
1
3
5
2 4
PRIMARY EICAS DISPLAY
April 01, 2001
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
7.10.6 D6-30151-425
Engines, APU -
Primary Engine Indications
5 EGT Indication
Displayed:
• (white) – normal operating range
• (amber) – continuous limit reached
• (red) – start or takeoff limit reached
Note: Indication remains white during TO or GA for five minutes (or tenminutes
if one engine fails or is shut down) even though continuous EGT limit is
reached.
Anti–Ice Indications
1 Nacelle Anti-ice Indication
Displayed (green) – nacelle anti-ice on.
2 Wing Anti-Ice Indication
Displayed (green) – wing anti-ice on.
WAI
AI
N1
N NAI NAI NAI
WAI
PRIMARY EICAS DISPLAY
2
1
April 01, 2001
747 Operations Manual
Engines, APU -
Primary Engine Indications
Copyright © The Boeing Company. See title page for details.
D6-30151-425 7.10.7
Secondary Exceedance Cue and In-flight Start Envelope
1 Secondary Engine Exceedance Cue
Displayed (cyan) -
• when a secondary engine parameter exceedance occurs
• until exceeding parameter returns to normal operating range
• uses same character field as status cue (replaces status cue if displayed)
2 In-Flight Start Envelope
Displayed (magenta) – airspeed range for an in-flight start at the current flight
level or maximum flight level (whichever is less) when the related Engine Fire
switch is in and a Fuel Control switch is in CUTOFF.
11
AT - C CRZ
N1
EGT
>ENG 4 SHUTDOWN
　
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