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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
36-13-00-223
PNEUMATIC - MANIFOLD SYSTEM - DUCT INSULATION
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
36-13-00-223
Purpose
The ground pneumatic connector check valve lets you connect
an external source of compressed air to the pneumatic
manifold. It prevents flow out of the manifold, and lets flow
into the manifold.
General Description
The check valve is a spring-loaded closed split flapper type
check valve. Also, it has a standard quick disconnect nippletype
fitting.
The ground pneumatic connector check valve has these parts:
* 3-inch (8-cm) quick disconnect nipple
* Internal check valve.
Location
The ground pneumatic connector check valve is on the right
side of the pneumatic manifold crossover duct. Access is
through the small panel on the forward outboard corner of the
right air conditioning bay access door.
Functional Description
When an external source is pressurizing the pneumatic
manifold, the force of the airflow is more than the spring force
and the check valve opens. The check valve springs and
manifold pressure close the valve when there is no external
source. This prevents leakage from the manifold.
Training Information Point
This connector connects directly into the pneumatic manifold
and supplies no temperature or pressure regulation. The
external pneumatic source must control temperature and
pressure within these placard limits on the connector door:
* Maximum temperature 450F (232C)
* Maximum pressure 60 psi.
Before you supply air from an external pneumatic source, these
conditions should be met:
* Battery power on
* Air conditioning pack switches off.
This makes sure that the pack valves will be closed.
CAUTION: MONITOR FLIGHT COMPARTMENT WING BODY
OVERHEAT SYSTEM DURING ALL OPERATIONS
OF THE PNEUMATIC SYSTEM.
115v ac power is necessary to operate the wing body overheat
or air conditioning system(s).
PNEUMATIC - MANIFOLD SYSTEM - GROUND PNEUMATIC CONNECTOR CHECK VALVE
EFFECTIVITY
GUN ALL 36-13-00
Page 10
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
36-13-00-224
PNEUMATIC - MANIFOLD SYSTEM - GROUND PNEUMATIC CONNECTOR CHECK VALVE
PNEUMATIC - MANIFOLD SYSTEM - GROUND PNEUMATIC CONNECTOR CHECK VALVE
EFFECTIVITY
GUN ALL 36-13-00
Page 11
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
36-13-00-224
Purpose
The bleed air isolation valve has these functions:
* Separates the pneumatic manifold into right and left sides
* Connects the right and left sides of the pneumatic manifold
for cross bleed operation.
Physical Description
The isolation valve is a 115-volt, single-phase, motor operated
butterfly valve. The bleed air isolation valve has a valve body
and an actuator assembly. The actuator assembly has these
parts:
* An electric motor and drive assembly
* A manual override handle/position indicator.
Location
The bleed air isolation valve is part of the crossover duct. It is in
the keel beam, in the forward area of the air conditioning bays.
Functional Description
The bleed air isolation valve is a butterfly shutoff valve. A 115v
ac, single phase motor operates the valve. It is reversible in
transit.
The valve has a manual override handle that lets you manually
set the position of the valve. The manual override handle is also
a position indicator. A flange in front of the lever shows OPEN
and CLOSED.
Indications
A visual position indicator on the valve shows the valve
position.
Operational Controls
A three-position toggle switch on the air conditioning bleed air
controls panel controls the bleed air isolation valve. These are
the switch positions:
* OPEN - The valve opens to connect the right and left sides of
the bleed air manifold
* AUTO - The aircraft switch position logic controls the valve to
open and close as necessary for aircraft operations
* CLOSE - The valve closes to separate the right and left sides
of the bleed air manifold.
PNEUMATIC - MANIFOLD SYSTEM - BLEED AIR ISOLATION VALVE
EFFECTIVITY
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D633A101-GUN Oct 10/2005
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