Content      ..     33      34      35      36     ..

Boeing 737 - 600/700/800/900. Operations Manual (1997 year) - page 35

Boeing 737 Operations Manual

Engines, APU

Chapter 7

Side by Side - Displays

Section 10

Primary and Secondary Engine Indications

[Option - Side by side display, lbs]

A/T LIM

CRZ

TAT-

12

C

START VALVE

START VALVE

OPEN

OPEN

96.0

96.0

OIL FILTER

OIL FILTER

TAI

TAI

BYPASS

BYPASS

87.7

87.7

LOW OIL

LOW OIL

10

10

PRESSURE

PRESSURE

0

0

8

8

2

2

6

6

4

4

100

100

N1

50

50

0

0

663

663

OIL P

200

200

1

EGT

100

100

3

0

0

77.7

77.7

OIL T

95

95

OIL Q %

N2

3

3

2

2

4

4

12

12

1

1

11.27

11.27

5

5

0

0

0

0

VIB

8

8

4

FF/FU

4

A

B

LB X 1000

3

4

3

4

4

CTR

2

0

2

0

1

2

1

1

HYD P

2

24

000

8

600

8

600

95

95

FUEL LB

HYD Q %

UPPER DISPLAY UNIT

1

Primary Engine Indications

2

Fuel Quantity Indications

Refer to Chapter 12, Fuel.

3

Secondary Engine Indications

4

Hydraulic Indications

Refer to Chapter 13, Hydraulics.

7.10.1

Engines, APU -

Side by Side - Displays

Boeing 737 Operations Manual

Autothrottle Limit, Thrust Mode Display and

Total Air Temperature

1

A/T LIM

CRZ

TAT-12 C

3

2

UPPER DISPLAY UNIT

1

Autothrottle Limit (A/T LIM) Indication

Illuminated (white) - The FMC is not providing the A/T system with N1 limit

values. The A/T is using a degraded N1 thrust limit from the related EEC.

2

Thrust Mode Display

Displayed (green) - the active N1 limit reference mode.

With N1 manual select knob on engine display control panel in AUTO, active N1

limit is displayed by reference N1 bugs.

Active N1 limit is normally calculated by FMC.

Thrust mode display annunciations are:

• R-TO - reduced takeoff

• R-CLB - reduced climb

• TO - takeoff

[Option]

• TO B - takeoff bump thrust

• CLB - climb

• CRZ - cruise

• G/A - go-around

• CON - continuous

•

- - - - FMC not computing thrust limit.

Note: R-TO does not indicate the type of reduced takeoff. The N1 limit may be

reduced due to the entry of an assumed temperature, a takeoff thrust derate

or a combination of both assumed temperature and takeoff thrust derate.

3

Total Air Temperature (TAT) Indication

Displayed (label -cyan, temp - white) - total air temperature (degrees C).

7.10.2

Engines, APU -

Side by Side - Displays

Boeing 737 Operations Manual

N1 Indications

3

4

6

7

96.0

96.0

N1 SET

10

87.7

10

87.7

AUTO

1

BOTH

0

0

8

8

2

2

2

6

6

4

4

N

1

1

2

5

8

CENTER

FORWARD PANEL

UPPER DISPLAY UNIT

1

N1 SET Outer Knob

AUTO -

• both reference N1 bugs set by FMC based on N1 limit page and takeoff

reference page

• displays reference N1 bugs at active N1 limit for A/T.

BOTH -

• both reference N1 bugs and readouts manually set by turning N1 SET

inner knob

• has no effect on A/T operation.

1 or 2 -

• respective N1 reference bug and readout manually set by turning N1 SET

inner knob

• has no effect on A/T operation.

2

N1 SET Inner Knob (spring-loaded to center)

Rotate - positions reference N1 bug(s) and readouts when N1 SET outer knob is

set to BOTH, 1, or 2.

3

Reference N1 Bugs

Displayed (green) - with N1 SET outer knob in AUTO, 1, 2 or BOTH position.

4

N1 Redlines

Displayed (red) - N1% RPM operating limit

7.10.3

Engines, APU -

Side by Side - Displays

Boeing 737 Operations Manual

5

N1 Command Sectors

Displayed

(white)

- momentary difference between actual N1 and value

commanded by thrust lever position.

6

N1 RPM Readouts (digital)

Displayed (white) - normal operating range.

Displayed (red) -

• operating limit exceeded

• on ground after engine shutdown, red box indicates an inflight

exceedance has occurred.

7

Reference N1 Readouts

Displayed (green) - manually set N1% RPM:

• set with N1 SET inner knob when N1 SET is in BOTH, 1, or 2 position

• blank when N1 SET outer knob in AUTO position

•

- - - - when N1 SET outer knob in Auto and FMC source invalid.

8

N1 RPM Indications

Displays N1% RPM:

• displayed (white) - normal operating range

• displayed (red) - operating limit exceeded.

Thrust Reverser Indications

1

REV

REV

75.3

75.3

10

10

0

0

8

8

2

2

6

4

6

4

N1

UPPER DISPLAY UNIT

1

Thrust Reverser (REV) Indications

Displayed (amber) - thrust reverser is moved from stowed position.

Displayed (green) - thrust reverser is deployed.

7.10.4

Engines, APU -

Side by Side - Displays

Boeing 737 Operations Manual

Thermal Anti-Ice Indication

1

TAI

TAI

87.7

87.7

10

10

0

0

8

8

2

2

6

4

6

4

N1

UPPER DISPLAY UNIT

1

Thermal Anti-Ice (TAI) Indications

Displayed (green) - cowl anti-ice valve(s) open.

Displayed (amber) - cowl anti-ice valve is not in position indicated by related

engine anti-ice switch.

7.10.5

Engines, APU -

Side by Side - Displays

Boeing 737 Operations Manual

EGT Indications

1

663

663

4

2

5

3

EGT

UPPER DISPLAY UNIT

1

Exhaust Gas Temperature (EGT) Redlines

Displayed (red) - maximum takeoff EGT limit.

2

Exhaust Gas Temperature (EGT) Amber Bands

Displayed (amber) - lower end of band displays maximum continuous EGT limit.

3

Exhaust Gas Temperature (EGT) Start Limit Lines

Displayed (red) - N2 less than 50%.

4

Exhaust Gas Temperature (EGT) Readouts (digital)

Displayed (white) - normal operating range (degrees C)

[Option - Color change inhibit 5 minutes]

Displayed (amber) - maximum continuous limit exceeded; color change inhibited

for up to 5 minutes during takeoff or go-around

[Option - Color change inhibit 10 minutes]

Displayed (amber) - maximum continuous limit exceeded

• color change inhibited for up to 5 minutes during takeoff or go-around

(normal operation)

• color change inhibited for up to 10 minutes during takeoff or go-around

(when an engine out condition occurs within the first 5 minutes of the

inhibit)

Displayed (red) - maximum takeoff limit or start limit exceeded

On ground, after engine shutdown, red box indicates an exceedance has occurred

EEC senses conditions that may lead to hot start during ground starts (blinking

white box).

5

Exhaust Gas Temperature (EGT) Indications

Displayed (white) - normal operating range.

7.10.6

Engines, APU -

Side by Side - Displays

Boeing 737 Operations Manual

[Option - Color change inhibit 5 minutes]

Displayed (amber) - maximum continuous limit exceeded; color change inhibited

for up to 5 minutes during takeoff or go-around

[Option - Color change inhibit 10 minutes]

Displayed (amber) - maximum continuous limit exceeded

• color change inhibited for up to 5 minutes during takeoff or go-around

(normal operation)

• color change inhibited for up to 10 minutes during takeoff or go-around

(when an engine out condition occurs within the first 5 minutes of the

inhibit)

Displayed (red) - maximum takeoff limit or start limit exceeded.

Engine Fail Alert

467

663

ENG

FAIL

1

EGT

UPPER DISPLAY UNIT

1

Engine Fail (ENG FAIL) Alert

Displayed (amber) -

• engine N2 below sustainable idle (less than 50%); and

• engine start lever in IDLE position.

Alert remains until -

• engine N2 above sustainable idle (50% or greater); or

• start lever moved to CUTOFF; or

• engine fire warning switch pulled.

7.10.7

Engines, APU -

Side by Side - Displays

Boeing 737 Operations Manual

N2 Indications

1

87.7

87.7

3

2

N2

UPPER DISPLAY UNIT

1

N2 Redlines

Displayed (red) - N2 % RPM operating limit.

2

N2 RPM Indications

Displays N2 % RPM

• displayed (white) - normal operating range

• displayed (red) - operating limit exceeded.

3

N2 Readouts (digital)

Displayed (white) - normal operating range.

Displayed (red) -

• operating limit exceeded

• on ground, after engine shutdown, red box indicates an inflight

exceedance has occurred.

Crossbleed Start Indication

1

X-BLD START

12.7

87.6

N2

UPPER DISPLAY UNIT

1

Crossbleed (X-BLD) START Indication

Displayed (magenta) - crossbleed air recommended for inflight start.

Displayed when airspeed is less than required for a windmilling start.

7.10.8

Engines, APU -

Side by Side - Displays

Boeing 737 Operations Manual

Fuel Flow/Fuel Used Indications

[Option - lbs]

2

12

12

7.27

7.27

0

0

8

8

FF/FU

4

4

LB X 1000

FUEL FLOW

RESET

1

3

RATE

4

USED

12

12

12.36

12.36

0

0

8

8

4

FF/FU

4

LB X 1000

CENTER

FORWARD PANEL

UPPER DISPLAY UNIT

1

FUEL FLOW Switch (spring-loaded to RATE)

RATE - displays fuel flow to engine.

USED -

• pointer and shading are removed

• displays fuel used since last reset

• after 10 seconds, display automatically reverts to fuel flow.

RESET -

• pointer and shading are removed

• resets fuel used to zero

• displays fuel used momentarily, decreases to zero, then displays fuel flow.

2

Fuel Flow (FF) Readout (digital)

[Option - lbs]

Displayed (white) - fuel flow to engine with FUEL FLOW switch in RATE

position (pounds per hour x 1000).

7.10.9

Engines, APU -

Side by Side - Displays

Boeing 737 Operations Manual

3

Fuel Flow (FF) Dial/ Index Markers & Digits (white)

[Option - lbs]

Displayed (white) - fuel flow to engine with FUEL FLOW switch in RATE

position (pounds per hour x 1000).

4

Fuel Used (FU) Readout (digital)

Illuminated (white) - displayed when FUEL FLOW switch moved to USED or

RESET.

Crew Alerts

START VALVE

START VALVE

1

OPEN

OPEN

OIL FILTER

OIL FILTER

BYPASS

BYPASS

3

LOW OIL

LOW OIL

2

PRESSURE

PRESSURE

UPPER DISPLAY UNIT

1

START VALVE OPEN Alert

Illuminated (amber) -

• steady - respective engine start valve open and air is supplied to starter

• blinking - uncommanded opening of start valve. Alert is displayed and

solid amber boxes are displayed in unannunciated positions for that

engine. All three boxes blink for ten seconds, then alert remains on steady

and solid amber boxes are removed (see Note).

2

LOW OIL PRESSURE Alert

Illuminated (amber) -

• steady - oil pressure at or below red line

• blinking - with a condition of low oil pressure. Alert is displayed and

solid amber boxes are displayed in unannunciated positions for that

engine. All three boxes blink for ten seconds, then alert remains on steady

and solid amber boxes are removed (see Note).

7.10.10

Engines, APU -

Side by Side - Displays

Boeing 737 Operations Manual

3

OIL FILTER BYPASS Alert

Illuminated (amber) -

• steady - indicates an impending bypass of scavenge oil filter

• blinking - with an impending bypass. Alert is displayed and solid amber

boxes are displayed in unannunciated positions for that engine. All three

boxes blink for ten seconds, then alert remains on steady and solid amber

boxes are removed (see Note).

Note: Blinking is inhibited:

• during takeoff from 80 knots to 400 feet RA, or 30 seconds after reaching

80 knots, whichever occurs first

• during landing below 200 feet RA until 30 seconds after touchdown

• during periods when blinking is inhibited, alerts illuminate steady.

Engine Oil Indications

[Option - Low oil quantity reverse video]

OIL QTY

100

100

50

50

1

0

0

4

2

OIL P

5

200

200

3

6

100

100

0

0

OIL T

7

LO

95

18

OIL Q %

UPPER DISPLAY UNIT

1

Oil Pressure (OIL P) Indication

Displays engine oil pressure (psi)

• displayed (white) - normal operating range

• displayed (amber) - caution range

• displayed (red) - operating limit reached.

2

Low Oil Pressure (OIL P) Redline

Displayed (red) - oil pressure operating limit.

7.10.11

Engines, APU -

Side by Side - Displays

Boeing 737 Operations Manual

3

Low Oil Pressure (OIL P) Amber Band

Displayed (amber) - low oil pressure caution range beginning at red line:

• variable depending on N2% RPM above 65% N2

• amber band not displayed below 65% N2.

4

High Oil Temperature (OIL T) Redline

Displayed (red) - oil temperature operating limit.

5

High Oil Temperature (OIL T) Amber Band

Displayed (amber) - oil temperature caution range.

6

Oil Temperature (OIL T) Indication

Displays oil temperature (degrees C):

• displayed (white) - normal operating range

• displayed (amber) - caution range reached

• displayed (red) - operating limit reached.

7

Oil Quantity (OIL Q)% Readout

Displays usable oil quantity as a percentage of full quantity.

[Option - Low oil quantity reverse video]

Video is reversed and LO (white) displayed for low oil quantity.

Note: Indicated oil quantity may decrease significantly during engine start,

takeoff and climb out. If this occurs, engine operation is not impacted and

the correct oil quantity should be indicated during level flight.

Note: An oil quantity indication as low as zero is normal if windmilling N2 RPM

is below approximately 8%.

Engine Vibration Indications

[Option - High vibration alert]

3

3

2

2

1

4

4

2

1

1

5

5

0

0

VIB

UPPER DISPLAY UNIT

7.10.12

Boeing 737 Operations Manual

Engines, APU

Chapter 7

Over/Under - Displays

Section 11

Primary Engine Indications

[Option - Over/Under display, kgs, fuel flow displayed full time]

TAT

- 12 C

R-TO

+42C

ENG 1

ENG 2

START VALVE

START VALVE

96.0

96.0

OPEN

OPEN

TAI

TAI

OIL FILTER

OIL FILTER

10

87.7

10

87.7

BYPASS

BYPASS

0

0

LOW OIL

LOW OIL

8

8

PRESSURE

PRESSURE

2

2

6

4

6

4

1

N

1

663

663

EGT

3

3.80

FF

3.80

CTR

7600

FUEL

2

KG

1

2

3 900

3 900

UPPER DISPLAY UNIT

1

Primary Engine Indications

2

Fuel Quantity Indications

Refer to Chapter 12, Fuel

3

Fuel Flow Indications

[Option - Fuel flow displayed full time]

7.11.1

Engines, APU -

Over/Under - Displays

Boeing 737 Operations Manual

Total Air Temperature, Thrust Mode Display, Selected

Temperature and Autothrottle Limit

1

C

3

TAT 12

R-TO

+42 C

2

UPPER DISPLAY UNIT

TAT 12

C

A/T LIM

+

42

C

4

UPPER DISPLAY UNIT

1

Total Air Temperature (TAT) Indication

Displayed (label - cyan, temp - white) - total air temperature (degrees C).

2

Thrust Mode Display

Displayed (green) - the active N1 limit reference mode.

With N1 manual select knob on engine display control panel in AUTO, active N1

limit is displayed by reference N1 bugs.

Active N1 limit is normally calculated by FMC.

Thrust mode display annunciations are:

• R-TO - reduced takeoff

• R-CLB - reduced climb

• TO - takeoff

[Option]

• TO B - takeoff bump thrust

• CLB - climb

• CRZ - cruise

• G/A - go-around

• CON - continuous

•

- - - - FMC not computing thrust limit.

Note: R-TO does not indicate the type of reduced takeoff. The N1 limit may be

reduced due to the entry of an assumed temperature, a takeoff thrust derate

or a combination of both assumed temperature and takeoff thrust derate.

7.11.2

Engines, APU -

Over/Under - Displays

Boeing 737 Operations Manual

3

Selected Temperature

Displayed (green) - selected assumed temperature (degrees C) for reduced thrust

takeoff N1.

Repeats data selected on TAKEOFF REF page.

4

Autothrottle Limit (A/T LIM) Indication

Illuminated (white) - The FMC is not providing the A/T system with N1 limit

values. The A/T is using a degraded N1 thrust limit from the related EEC.

Replaces thrust mode display annunciation when illuminated.

N1 Indications

3

4

6

7

96.0

96.0

N1 SET

AUTO

10

87.7

10

87.7

1

BOTH

0

0

8

8

2

2

2

6

4

6

4

N

1

1

2

5

8

CENTER

FORWARD PANEL

UPPER DISPLAY UNIT

1

N1 SET Outer Knob

AUTO -

• both reference N1 bugs set by FMC based on N1 limit page and takeoff

reference page

• displays reference N1 bugs at active N1 limit for A/T.

BOTH -

• both reference N1 bugs and readouts manually set by turning N1 SET

inner knob

• has no effect on A/T operation.

1 or 2 -

• respective N1 reference bug and readout manually set by turning N1 SET

inner knob

• has no effect on A/T operation.

7.11.3

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