CHAPTER
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
CHAPTER 56
Windows
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CHAPTER 56
Windows
CH-SC-SU Subject Page Effectivity
56-00-00 WINDOWS - INTRODUCTION 2 GUN ALL
56-10-00 WINDOWS - FLIGHT COMPARTMENT - INTRODUCTION 2 GUN ALL
56-11-00 WINDOWS - CONTROL CABIN FIXED WINDOWS - NO.1 WINDOW 2 GUN ALL
56-11-00 WINDOWS - CONTROL CABIN FIXED WINDOWS - NO. 3 WINDOW 4 GUN ALL
56-11-00 WINDOWS - CONTROL CABIN FIXED WINDOWS - NO. 4 and 5
WINDOWS
8 GUN 001-012, 101-108, 201-999 PRE
SB 737-56-1017
56-12-00 WINDOWS - CONTROL CABIN SLIDING WINDOWS - NO. 2 OPENABLE
WINDOW
1 GUN ALL
56-21-00 WINDOWS - PASSENGER CABIN WINDOWS - GENERAL
DESCRIPTION
1 GUN ALL
56-22-00 WINDOWS - EMERGENCY EXIT WINDOW - GENERAL DESCRIPTION 1 GUN ALL
56-31-00 WINDOWS - DOOR-MOUNTED WINDOWS - GENERAL DESCRIPTION 2 GUN ALL
56-CONTENTS
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CHAPTER 56
Windows
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56-00-00
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General
These are the types of windows on the airplane:
* Flight compartment windows (fixed and sliding)
* Passenger compartment windows
* Emergency exit windows
* Door-mounted windows.
All the windows can hold cabin pressurization loads and have
fail safe properties.
WINDOWS - INTRODUCTION
EFFECTIVITY
GUN ALL 56-00-00
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WINDOWS - INTRODUCTION
WINDOWS - INTRODUCTION
EFFECTIVITY
GUN 101-108 PRE SB 737-56-1017 56-00-00
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WINDOWS - INTRODUCTION
WINDOWS - INTRODUCTION
EFFECTIVITY
GUN 109-118; GUN 101-108 POST SB 737-56-1017 56-00-00
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WINDOWS - INTRODUCTION
WINDOWS - INTRODUCTION
EFFECTIVITY
GUN 001-012, 201-999 PRE SB 737-56-1017 56-00-00
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WINDOWS - INTRODUCTION
WINDOWS - INTRODUCTION
EFFECTIVITY
GUN 013-099; GUN 001-012, 201-999 POST SB 737-56-1017 56-00-00
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WINDOWS - INTRODUCTION
56-10-00
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GUN 001-012, 101-108, 201-999 PRE SB 737-56-1017
General Description
There are ten windows in the flight compartment. There are five
left (L) windows and five right (R) windows.
Flight compartment windows No. 1, 3, 4, and 5 are fixed and do
not open. Window No. 2 is a sliding window that opens.
GUN 013-099, 109-118; GUN 001-012, 101-108, 201-999 POST SB
737-56-1017
General Description
There are six windows in the flight compartment. There are
three left (L) windows and three right (R) windows.
Flight compartment windows No. 1, and 3 are fixed and do not
open. Window No. 2 is a sliding window that opens.
GUN ALL
Interface
Some flight compartment windows get heat from the window
anti-ice system.
See the ice and rain protection chapter for more information
about the window anti-ice system. (CHAPTER 30)
WINDOWS - FLIGHT COMPARTMENT - INTRODUCTION
EFFECTIVITY
GUN ALL 56-10-00
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WINDOWS - FLIGHT COMPARTMENT - INTRODUCTION
WINDOWS - FLIGHT COMPARTMENT - INTRODUCTION
EFFECTIVITY
GUN 001-012, 101-108, 201-999 PRE SB 737-56-1017 56-10-00
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WINDOWS - FLIGHT COMPARTMENT - INTRODUCTION
WINDOWS - FLIGHT COMPARTMENT - INTRODUCTION
EFFECTIVITY
GUN 013-099, 109-118; GUN 001-012, 101-108, 201-999 POST SB 737-56-
1017
56-10-00
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WINDOWS - FLIGHT COMPARTMENT - INTRODUCTION
56-11-00
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General
Window No. 1 has laminated glass on each side of a plastic
core. They are resistant to bird impact with or without window
heat.
The inner glass pane is thicker than the outer glass pane. It is
the primary structural part. It holds the internal airplane
pressure load.
The vinyl layer is a secondary structure. It is also a fail safe
device that prevents the shatter of a broken window if the inner
pane breaks.
The outer pane is not structural. The outer pane gives a rigid,
hard, scratch resistant surface. A hydrophobic windshield
coating is applied to the outer pane to improve pilot visibility
during rain conditions.
A conductive film on the inner face of the outer glass pane
permits electrical heating for window anti-icing and defogging.
Bus bars molded into the upper and lower edges of the
windows make electrical contact with the conductive film and
connect to electrical terminals.
WARNING: BE CAREFUL WHEN YOU DO WORK ON THE
WINDOW NO. 1. THE OUTPUT VOLTAGE OF THE
AUTOTRANSFORMER IS 250-350 VOLTS. THIS
CAN CAUSE INJURY TO PERSONS.
WINDOWS - CONTROL CABIN FIXED WINDOWS - NO.1 WINDOW
EFFECTIVITY
GUN ALL 56-11-00
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WINDOWS - CONTROL CABIN FIXED WINDOWS - NO.1 WINDOW
WINDOWS - CONTROL CABIN FIXED WINDOWS - NO.1 WINDOW
EFFECTIVITY
GUN ALL 56-11-00
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General
Window No. 3 has two stretched acrylic panes. A phenolic
spacer gives separation between the panes. The spacer
attaches to the panes by low-tack pressure sensitive tape
which also operates as an air seal. The phenolic spacer gives
an insulation cavity which prevents fog on the inner surface of
the windows.
There is a small hole in the upper forward corner of the inner
pane. This hole must be open at all times. It permits pressure in
the air space to be equal to the pressure in the cabin.
GUN 201-999
WARNING: BE CAREFUL WHEN YOU DO WORK ON THE
WINDOW NO. 3. THE OUTPUT VOLTAGE OF THE
AUTOTRANSFORMER IS 250-350 VOLTS. THIS
CAN CAUSE INJURY TO PERSONS.
The window has a thermal switch bracket that you must align
with the thermal switch location on the glass.
GUN ALL
WINDOWS - CONTROL CABIN FIXED WINDOWS - NO. 3 WINDOW
EFFECTIVITY
GUN ALL 56-11-00
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56-11-00-005
WINDOWS - CONTROL CABIN FIXED WINDOWS - NO. 3 WINDOW
WINDOWS - CONTROL CABIN FIXED WINDOWS - NO. 3 WINDOW
EFFECTIVITY
GUN 001-099, 101-118 56-11-00
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WINDOWS - CONTROL CABIN FIXED WINDOWS - NO. 3 WINDOW
WINDOWS - CONTROL CABIN FIXED WINDOWS - NO. 3 WINDOW
EFFECTIVITY
GUN 201-999 56-11-00
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WINDOWS - CONTROL CABIN FIXED WINDOWS - NO. 3 WINDOW
56-11-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
General
Windows No. 4 and 5 are almost the same. Windows No. 4 and 5
have laminated glass on each side of a polyvinyl butyral (vinyl)
core.
Window No. 4 has one more vinyl layer to prevent the shatter of
broken glass if there is a bird strike. The inner vinyl layer is not
structural.
A conductive strip on the outer face of the inner glass pane
permits electrical heating for window anti-ice and window fog
conditions.
WINDOWS - CONTROL CABIN FIXED WINDOWS - NO. 4 and 5 WINDOWS
EFFECTIVITY
GUN 001-012, 101-108, 201-999 PRE SB 737-56-1017 56-11-00
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56-11-00-010
WINDOWS - CONTROL CABIN FIXED WINDOWS - NO. 4 and 5 WINDOWS
WINDOWS - CONTROL CABIN FIXED WINDOWS - NO. 4 and 5 WINDOWS
EFFECTIVITY
GUN 001-012, 101-108, 201-999 PRE SB 737-56-1017 56-11-00
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56-11-00-010
Purpose
The No. 2 window is on tracks so that it may be rolled back to
permit ventilation and communication during ground handling
operations.
You can operate the right window from outside of the airplane
as an emergency exit.
Physical Description
The No. 2 openable window has these parts:
* Handle with trigger
* Bellcranks
* Pushrods
* Clothes guard protector
* Link
* Springs
* Window open latch plate
* Upper roller
* Upper track
* Lower roller
* Lower track
* Latch mechanism rod
* External access door
* External release handle.
Window No. 2 has laminated glass on each side of a polyvinyl
butyral (vinyl) core. The window is resistant to bird impact with
or without window heat.
The inner glass pane is thicker than the outer pane. It is the
primary structure. It holds the internal airplane pressure load.
The vinyl layer is the secondary structure. It is also a fail-safe
device that prevents the shatter of the window if the inner pane
breaks.
The outer pane is not structural. The outer pane gives a rigid,
hard, scratch-resistant surface.
A conductive strip on the inner face of the outer glass pane
permits electrical heating for window anti-icing and defogging.
Functional Description
To open the window, operate the handle. This turns a bellcrank,
which is connected to other bellcranks at the rear, top, and
bottom of the window. This moves the window inboard. The
forward roller prevents backward movement of the window until
there is sufficient clearance. This lets free movement back to
the latched open position. When the window is moved to the
rear, the lower aft roller moves to the window open latch plate.
The window open latch plate is spring-loaded to lock the
window in the open position.
WINDOWS - CONTROL CABIN SLIDING WINDOWS - NO. 2 OPENABLE WINDOW
EFFECTIVITY
GUN ALL 56-12-00
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56-12-00-001
The window is unlocked from its locked open position when you
pull forward on the latch mechanism rod. This releases the
window open latch plate and lets the window move forward.
While the window moves forward, it resets the window open
latch plate. Move the window forward by its handle until it
touches the forward stops. As the handle is turned, the window
is moved outboard, guided by a guide pin in the track, until the
window is closed against the window frame. When you release
the handle, a trigger bolt latches the window closed.
Normal Operation
To open the window, hold the trigger and turn the handle back
and inboard. After the window moves inboard, move it back
until it locks it in the open position.
To close the window, pull forward on the latch mechanism rod
to unlock the window. Hold the trigger and move the window
forward until you can turn the handle forward and outboard.
When you release the trigger, the window latches.
Emergency Operation
To open the window, push the external access door, and pull
the external release handle. This will position the window
inwards. Then move the window to the rear.
Training Information Point
WARNING: BE CAREFUL WHEN YOU DO WORK ON THE
WINDOW NO. 2. THE OUTPUT VOLTAGE OF THE
AUTOTRANSFORMER IS 250-350 VOLTS. THIS
CAN CAUSE INJURY TO PERSONS.
WINDOWS - CONTROL CABIN SLIDING WINDOWS - NO. 2 OPENABLE WINDOW
EFFECTIVITY
GUN ALL 56-12-00
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WINDOWS - CONTROL CABIN SLIDING WINDOWS - NO. 2 OPENABLE WINDOW
WINDOWS - CONTROL CABIN SLIDING WINDOWS - NO. 2 OPENABLE WINDOW
EFFECTIVITY
GUN ALL 56-12-00
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56-12-00-001
GUN 001-019, 101-110, 201-999 PRE SL 737-56-012
General
The passenger compartment windows have these components:
* Outer pane
* Middle pane
* Inner pane.
The outer and middle panes are structural. The windows are
plug type windows.
The outer pane is made of stretched acrylic plastic. It is
rectangular with rounded corners and a beveled outer edge to
fit with the window frame. The shape of the pane is curved to
align with the fuselage contour.
The middle pane gives the structural fail-safe function. It can
hold 1.5 times the normal pressure load. The middle pane is
made of cast acrylic and has a shape like the outer pane, but
with an edge not beveled. The middle pane is contained in the
window seal. A small breather hole is near the bottom of the
middle pane.
The inner pane is not structural.
GUN 020-099, 111-118; GUN 001-019, 101-110, 201-999 POST SL
737-56-012
General
The passenger compartment windows have these components:
* Outer pane
* Middle pane
* Airflow dampener
* Inner pane.
The outer and middle panes are structural. The windows are
plug type windows.
The outer pane is made of stretched acrylic plastic. It is
rectangular with rounded corners and a beveled outer edge to
fit with the window frame. The shape of the pane is curved to
align with the fuselage contour.
The middle pane gives the structural fail-safe function. It can
hold 1.5 times the normal pressure load. The middle pane is
made of cast acrylic and has a shape like the outer pane, but
with an edge not beveled. The middle pane is contained in the
window seal. A small breather hole is near the top of the middle
pane.
WINDOWS - PASSENGER CABIN WINDOWS - GENERAL DESCRIPTION
EFFECTIVITY
GUN ALL 56-21-00
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56-21-00-001
GUN 020-099, 111-118; GUN 001-019, 101-110, 201-999 POST
SL 737-56-012 (Continued)
The airflow dampener helps to prevent the window from fogging
during flight. The airflow dampener is made of injected molded
white colored polycarbonate. The airflow dampener is attached
above the breather hole on the middle pane.
The inner pane is not structural.
GUN ALL
Location
The passenger compartment windows are between the
fuselage frames in the passenger compartment.
WINDOWS - PASSENGER CABIN WINDOWS - GENERAL DESCRIPTION
EFFECTIVITY
GUN ALL 56-21-00
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WINDOWS - PASSENGER CABIN WINDOWS - GENERAL DESCRIPTION
WINDOWS - PASSENGER CABIN WINDOWS - GENERAL DESCRIPTION
EFFECTIVITY
GUN 001-019, 101-110, 201-999 PRE SL 737-56-012 56-21-00
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56-21-00-001
WINDOWS - PASSENGER CABIN WINDOWS - GENERAL DESCRIPTION
WINDOWS - PASSENGER CABIN WINDOWS - GENERAL DESCRIPTION
EFFECTIVITY
GUN 020-099, 111-118; GUN 001-019, 101-110, 201-999 POST SL 737-56-012 56-21-00
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56-21-00-001
GUN 001-019, 101-110, 201-999 PRE SL 737-56-012
General
The emergency exit window has these components:
* Outer pane
* Middle pane
* Inner pane.
The outer and middle panes are structural. The windows are
plug type windows.
The outer pane is made of stretched acrylic plastic. It is
rectangular in shape with rounded corners and a beveled outer
edge to fit with the window frame. The shape the pane is curved
to align with the fuselage contour.
The middle pane gives the structural fail-safe function. It can
hold 1.5 times the normal pressure load. The middle pane is
made of cast acrylic and has a shape like the outer pane, but
with an edge not beveled. The middle pane is contained in the
window seal. A small breather hole is near the bottom of the
middle pane.
The inner pane is not structural.
GUN 020-099, 111-118; GUN 001-019, 101-110, 201-999 POST SL
737-56-012
General
The emergency exit window has these components:
* Outer pane
* Middle pane
* Inner pane.
The outer and middle panes are structural. The windows are
plug type windows.
The outer pane is made of stretched acrylic plastic. It is
rectangular in shape with rounded corners and a beveled outer
edge to fit with the window frame. The shape the pane is curved
to align with the fuselage contour.
The middle pane gives the structural fail-safe function. It can
hold 1.5 times the normal pressure load. The middle pane is
made of cast acrylic and has a shape like the outer pane, but
with an edge not beveled. The middle pane is contained in the
window seal. A small breather hole is near the top of the middle
pane.
The inner pane is not structural.
GUN ALL
WINDOWS - EMERGENCY EXIT WINDOW - GENERAL DESCRIPTION
EFFECTIVITY
GUN ALL 56-22-00
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56-22-00-001
Location
The emergency exit windows are in each emergency exit in the
passenger compartment.
WINDOWS - EMERGENCY EXIT WINDOW - GENERAL DESCRIPTION
EFFECTIVITY
GUN ALL 56-22-00
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56-22-00-001
WINDOWS - EMERGENCY EXIT WINDOW - GENERAL DESCRIPTION
WINDOWS - EMERGENCY EXIT WINDOW - GENERAL DESCRIPTION
EFFECTIVITY
GUN 001-019, 101-110, 201-999 PRE SL 737-56-012 56-22-00
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56-22-00-001
WINDOWS - EMERGENCY EXIT WINDOW - GENERAL DESCRIPTION
WINDOWS - EMERGENCY EXIT WINDOW - GENERAL DESCRIPTION
EFFECTIVITY
GUN 020-099, 111-118; GUN 001-019, 101-110, 201-999 POST SL 737-56-012 56-22-00
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56-22-00-001
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WINDOWS - EMERGENCY EXIT WINDOW - GENERAL DESCRIPTION
56-31-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
General
The door-mounted windows have these components:
* Outer pane
* Middle pane
* Inner pane.
The outer and middle panes are structural. The outer and
middle panes are resistant to 1.5 times the normal pressure
loads at a temperature of 70F. The outer pane is made of
stretched acrylic for more strength. The middle pane is made of
a cast acrylic.
The inner pane is not structural. It connects to the cabin
sidewall panel. The inner pane is made from polycarbonate.
WINDOWS - DOOR-MOUNTED WINDOWS - GENERAL DESCRIPTION
EFFECTIVITY
GUN ALL 56-31-00
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56-31-00-001
WINDOWS - DOOR-MOUNTED WINDOWS - GENERAL DESCRIPTION
WINDOWS - DOOR-MOUNTED WINDOWS - GENERAL DESCRIPTION
EFFECTIVITY
GUN 001-099, 101-118 56-31-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
56-31-00-001
WINDOWS - DOOR-MOUNTED WINDOWS - GENERAL DESCRIPTION
WINDOWS - DOOR-MOUNTED WINDOWS - GENERAL DESCRIPTION
EFFECTIVITY
GUN 201-999 56-31-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
56-31-00-001