Fuel Flow/Used Switch
Push – digital readout shows fuel used since last reset. After 10 seconds, display automatically reverts to fuel flow.

Fuel Flow Indicator
Indicates rate of fuel flow in pounds or kilograms per hour at all times.
Copyright . The Boeing Company. See title page for details.
7.10.6   December 1, 2000

Engines, APU -Controls and Indicators 737 Operations Manual

FUEL USED RESET Switch (recessed)
Push –
.
resets computed fuel used to zero

.  
digital readout displays current fuel used for one second, decreases to
zero, then fuel flow

.
resets abnormal start advisory system.

Note:  Failure of a fuel flow input signal to the primary EIS panel will cause the affected display pointer and digital counter to slew to their lower stops and hold for two seconds. The pointer will then disappear and the counter will display dashes. An internal failure will cause the display(s) to simply blank.
Engines, APU -Controls and Indicators

Engine Instrument System (EIS) Secondary Panel

START VALVE  START VALVE 
OPEN  OPEN 
LOW OIL  OIL FILTER  LOW OIL  OIL FILTER 
PRESSURE  BYPASS  PRESSURE  BYPASS 

CENTER INSTRUMENT PANEL
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7.10.8  December 1, 2000

Engines, APU -Controls and Indicators 737 Operations Manual
Caution Lights

 START VALVE OPEN 
LOW OIL PRESSURE  OIL FILTER BYPASS 

START VALVE OPEN Light
Illuminated (amber) – related engine start valve is open and air is being supplied to the starter.

LOW OIL PRESSURE Light
Illuminated (amber) – related engine oil pressure is at or below the red radial.

OIL FILTER BYPASS Light
Illuminated (amber) – indicates an impending bypass of scavenge oil filter.
Total Air Temperature Indication

Total Air Temperature (TAT) Indicator
Displays total air temperature in degrees C.
Engines, APU -Controls and Indicators 737 Operations Manual

Engine Oil Indications

Oil Pressure (OIL PRESS) Indication (green)
Displays engine oil pressure in psi.
Note:  Oil pressure is unregulated and is primarily a function of engine speed (N2).

Low Oil Pressure Yellow Band
With takeoff thrust set, indicates minimum oil pressure limit. Note: Yellow band is valid only at takeoff thrust.

Low Oil Pressure Red Radial
Indicates minimum oil pressure limit.

Oil Temperature (OIL TEMP) Indication (green)
Displays engine oil temperature in degrees C.

High Oil Temperature Yellow Band
Indicates oil temperature caution range.

High Oil Temperature Red Radial
Indicates maximum oil temperature limit.
Copyright . The Boeing Company. See title page for details.
7.10.10   December 1, 2000

Engines, APU -Controls and Indicators 737 Operations Manual

Oil Quantity (OIL QTY) Indication
Displays engine oil quantity in percentage of full quantity.
Engine Vibration Indications

Airborne Vibration (VIB) Monitor (green)
Indicates engine vibration level.
Hydraulic System Pressure and Quantity Indications

PRESS
%FULL
QTY
RF 86%

Described in Chapter 13 – Hydraulics.
Note:  Failure of an input signal to the secondary EIS panel will cause an affected pointer to blank or an affected digital counter to display dashes. An internal failure will cause either type of display to blank.
Engines, APU -Controls and Indicators
737 Operations Manual
Conventional Engine Instruments Primary Panel
1 REVERSER
REVERSER
2
UNLOCKED
UNLOCKED
1
1
% RPM X 10
% RPM X 10
0
0
12
12
N1
N1
10
10
2
2
8
8
4
4
PULL TO SET PULL TO SET
2
2
°C X 100
°C X 100
EGT
EGT
C X 100
C X 100
%RPM X 10 % RPM X 10
0
0
12
12
N2
N2
10
10
2
2
84
84
6
6
3
3
4
4
100
6
100 6
RATE/USED
RATE/USED
5
5
1
1
FF
4
KGPHX1000 3
2
FF
4
KGPHX1000 3
2
3
2
1
　
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