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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
36-13-00-221
PNEUMATIC - MANIFOLD SYSTEM - INTRODUCTION
PNEUMATIC - MANIFOLD SYSTEM - INTRODUCTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
36-13-00-221
PNEUMATIC - MANIFOLD SYSTEM - INTRODUCTION
PNEUMATIC - MANIFOLD SYSTEM - INTRODUCTION
EFFECTIVITY
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D633A101-GUN Oct 10/2005
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
36-13-00-221
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PNEUMATIC - MANIFOLD SYSTEM - INTRODUCTION
36-13-00
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D633A101-GUN Oct 10/2005
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Purpose
The pneumatic manifold sends hot, compressed air through the
pneumatic system.
Physical Description
The pneumatic ducts are thin-walled tubes. The ducts have
flanges at their ends and join with flange clamps.
The duct sections are made short in length. This lets ducts
expand when hot air flows through them. This is thermal
expansion.
Tension force holds the ducts between their structural mounts.
Some ducts have a gold coating. The coating has these
functions:
* Protects the ducts from the effects of hydrocarbon
contamination (hydrogen embrittlement)
* Reduces heat transfer.
Insulation blankets cover some ducts to reduce heat transfer.
Location
Pneumatic ducts are in these areas of the airplane:
* Pneumatic manifold
* Pneumatic systems.
Training Information Point
Overheat detectors are near the pneumatic ducts. These
elements operate by the hot air that comes from pneumatic
duct leaks. An active element causes a WING-BODY
OVERHEAT light on the air conditioning bleed air controls
panel to come on.
NOTE: The duct leak overheat protection system uses 115v ac
power. Without power, the system will not operate.
See the wing and body overheat detection section for more
information (SECTION 26-18).
Some duct flange clamps are in areas that contain control
cables or other mechanical/electrical devices. Special care
must be taken so that the clamps and these components do not
touch.
WARNING: DO NOT REMOVE CLAMPS ON PRESSURIZED
DUCTS. PERSONAL INJURY OR EQUIPMENT
DAMAGE MAY OCCUR.
Keep the pneumatic ducting clean and free from these types of
contamination:
* Oil
* Hydraulic fluid
* Fuel
* Other hydrocarbon compounds.
PNEUMATIC - MANIFOLD SYSTEM - DUCT
EFFECTIVITY
GUN ALL 36-13-00
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D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
36-13-00-222
PNEUMATIC - MANIFOLD SYSTEM - DUCT
PNEUMATIC - MANIFOLD SYSTEM - DUCT
EFFECTIVITY
GUN ALL 36-13-00
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D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
36-13-00-222
Purpose
The pneumatic manifold duct insulation decreases the heat flow
from the ducts to the adjacent area.
General Description
There are two types of pneumatic insulation on the airplane:
* Soft insulation
* Hard shell insulation.
Soft insulation is a soft, precut, fiberglass pad insulation that is
wrapped with a cover and held with tie straps.
Hard shell insulation is a hard, preformed, fiberglass lay-up, air
gap insulation that is pre-shaped to fit snugly around the
contour of a duct section. The hard shell insulation unit comes
in two halves and attaches to the duct section with band clamps
or wire lace.
Location
The soft insulation is on the APU duct in the aft cargo
compartment areas. The APU duct and soft insulation are
behind the sidewall panels in the aft cargo compartments.
The hard shell insulation is on the pneumatic ducts in the keel
beam of the airplane.
Functional Description
The duct insulation decreases the heat flow from the ducts they
cover. This protects the airplane structure, wiring, and
components adjacent to the ducts.
PNEUMATIC - MANIFOLD SYSTEM - DUCT INSULATION
EFFECTIVITY
GUN ALL 36-13-00
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D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
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