*
Two electrical connectors
*
Body and with heater
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Two pressure line connectors.
The heater is a 35 watt, resistance-type heater. It attaches to the body of the controller at its base.
Location
The controller is on the right side of the engine fan case at the
3:30 position. The controller is between the PRSOVC and HPFAC.
Functional Description
The EAI controller uses the torque motor to regulate control pressure to the EAI valve. The controller gives control pressure to the valve if the torque motor has no power (fail safe on).
The heater uses 28v dc power. The heater prevents the controller from freezing.
Training Information Point
You remove, cap, and stow the torque motor electrical connector when you want to manually set the EAI valve open.
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ENGINE ANTI-ICE -EAI VALVE CONTROLLER
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ENGINE ANTI-ICE -EAI PRESSURE SENSOR
General
Each engine has two EAI pressure sensors. The sensors are the same. They both measure the pressure in the EAI duct downstream of the EAI valve. The left and right ACIPS -EAI control cards use the information from the pressure sensors to control the EAI system.
The pressure sensors are redundant. If one sensor fails, the system operates the same.
Each pressure sensor has a pressure line connector, a housing and an electrical connector.
Location
The sensors are on the right side of the engine fan case at the
1:45 and 3:00 positions.
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ENGINE ANTI-ICE -EAI PRESSURE SENSOR
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ENGINE ANTI-ICE -EAI DUCT
General
The EAI ducts move air from the engine high stage bleed port to the cowl leading edge.
There are two EAI ducts. One is not insulated and the other is insulated.
Locations
The not insulated EAI duct is on the left and bottom sides of the engine core. The insulated EAI duct is on the bottom of the engine core and the right lower side of the fan case.
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ENGINE ANTI-ICE -EAI DUCT
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ENGINE ANTI-ICE -CONTROLLER AIR COOLER
Purpose
The controller air cooler (CAC) decreases the temperature of the engine bleed air (HP15) that goes to these controllers:
*
EAI valve controller
*
Pressure regulating and shutoff valve controller (PRSOVC)
*
High pressure and fan air controller (HPFAC).
See the engine air supply section for more information about the PRSOVC and the HPFAC (SECTION 36-11).
Physical Description
The controller air cooler is an air-to-air heat exchanger. It has three pneumatic line connectors, two high pressure and one low pressure (fan air).
Location
The controller air cooler is on the right side of the engine core at the 2:30 position. The cooler is forward of the main fuel supply line.
Functional Description
Hot air from the high stage compressor section and cool fan air flows through the controller air cooler. The cool air removes heat from the hot air. This decreases the temperature of the hot air.
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ENGINE ANTI-ICE -FUNCTIONAL DESCRIPTION
General
The EAI system has two EAI selectors, one for each engine. Each selector lets you operate the EAI system for each engine independently. The selectors provide an OFF, AUTO, or ON input to their related ACIPS control card.
The left ACIPS control card controls the left EAI system. The right ACIPS control card controls the right EAI system. The ice detectors supply analog inputs to the EAI ACIPS control cards. The left detector connects to the left card. The right detector connects to the right card. Each card gives its ice detector data to the other card through the systems ARINC 629 buses.
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