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* ARINC - Aeronautical Radio Incorporated
* aux - auxiliary
* capt - captain
* ft - feet
* F/O - first officer
* fwd - forward
* L - left
* R - right
STATIC AND TOTAL AIR PRESSURE SYSTEM - INTRODUCTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-11-00-001
STATIC AND TOTAL AIR PRESSURE SYSTEM - INTRODUCTION
STATIC AND TOTAL AIR PRESSURE SYSTEM - INTRODUCTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-11-00-001
General
The static and total air pressure system gets air pressure inputs
from three pitot probes and six static ports on the airplane
fuselage.
These are the two types of air pressure:
* Static air pressure is the ambient air pressure around the
airplane
* Pitot air pressure is the air pressure on the pitot probe tube
as a result of the forward motion of the airplane.
The static and total air pressure system has these components:
* Three pitot probes
* Six static ports
* Five drain fittings.
Flexible and hard pneumatic tubing are used to connect the
pitot-static components.
The system drains are used to remove condensation in the
pitot-static lines.
Primary Static and Total Air Pressure System
The two primary pitot probes connect to two pitot air data
modules (ADMs). Two pairs of the primary static ports connect
to two static ADMs.
The ADMs change the air pressures to electrical signals and
send them to the air data inertial reference units (ADIRUs) on
ARINC 429 data buses. The ADIRUs use the signals to calculate
flight parameters such as airspeed and altitude.
Each pitot line and each static line has a drain fitting.
Alternate Static and Total Air Pressure System
The auxiliary pitot probe connects to the standby altimeter/
airspeed indicator. The alternate static ports connect to the
standby altimeter/airspeed indicator and to the cabin
differential pressure indicator.
The standby static line has a drain fitting.
STATIC AND TOTAL AIR PRESSURE SYSTEM - GENERAL DESCRIPTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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STATIC AND TOTAL AIR PRESSURE SYSTEM - GENERAL DESCRIPTION
STATIC AND TOTAL AIR PRESSURE SYSTEM - GENERAL DESCRIPTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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Primary Pitot Drain Fittings
The drain fittings for the captain and first officer pitot lines are in
the forward equipment compartment adjacent to the
compartment access door.
STATIC AND TOTAL AIR PRESSURE SYSTEM - COMPONENT LOCATION - FORWARD EQUIPMENT COMPARTMENT
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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STATIC AND TOTAL AIR PRESSURE SYSTEM - COMPONENT LOCATION - FORWARD EQUIPMENT COMPARTMENT
STATIC AND TOTAL AIR PRESSURE SYSTEM - COMPONENT LOCATION - FORWARD EQUIPMENT COMPARTMENT
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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Alternate Static Drain Fitting
The drain fitting in the alternate static line is in the electronic
equipment compartment below the E-5 rack.
STATIC AND TOTAL AIR PRESSURE SYSTEM - COMPONENT LOCATION - ELECTRONIC EQUIPMENT COMPARTMENT
EFFECTIVITY
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STATIC AND TOTAL AIR PRESSURE SYSTEM - COMPONENT LOCATION - ELECTRONIC EQUIPMENT COMPARTMENT
STATIC AND TOTAL AIR PRESSURE SYSTEM - COMPONENT LOCATION - ELECTRONIC EQUIPMENT COMPARTMENT
EFFECTIVITY
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