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AIR CONDITIONING -PACK CLG AND MIX MANIFOLD TEMP CONTROL -PACK COOLING TEMP SENSORS
*
Condenser inlet temperature sensor (2)
*
Secondary turbine inlet temperature sensor.
The ASCPC and CTC pack discharge temperature sensors are interchangeable.
EFFECTIVITY BEJ ALL 21-52-00
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AIR CONDITIONING -PACK CLG AND MIX MANIFOLD TEMP CONTROL -PACK COOLING TEMP SENSORS
EFFECTIVITY BEJ ALL 21-52-00
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D633W101-BEJ Jan 05/2002
AIR CONDITIONING -PACK CLG AND MIX MANIFOLD TEMP CTRL -MANIFOLD TEMP SENSORS
Purpose
The mix manifold temperatures at the manifold outlet temperature sensors. temperature mix manifold. sensors There monitor are four air mix
Physical Description
The sensors are single element thermistor devices. The sensor housing has an external hex wrench fitting and threads for installation in the mix manifold.
Location
The sensors are in the top of the mix manifold. Open the flexible neoprene liner at the aft end of the forward cargo compartment to get access to the mix manifold area.
Training Information Point
The mix manifold temperature sensors are interchangeable. The mix manifold temperature sensors are also interchangeable with the cabin zone duct temperature sensors.
EFFECTIVITY BEJ ALL 21-52-00
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AIR CONDITIONING -PACK CLG AND MIX MANIFOLD TEMP CTRL -MANIFOLD TEMP SENSORS
EFFECTIVITY BEJ ALL 21-52-00
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777 AIRCRAFT MAINTENANCE MANUAL
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21-52-00
Page 30 D633W101-BEJ Jan 05/2002
AIR CONDITIONING -PACK CLG AND MIX MANIFOLD TEMP CTRL -RAM AIR INLET DOOR AND ACTUATOR
Purpose
The ram air inlet door controls the flow of ram air supplied to the dual heat exchanger. This is to control the amount of air used to cool the dual heat exchanger. This functions with other components to control air temperature from the pack.
BEJ ALL PRE SB 777-21-0059
Physical Description
The ram air inlet door is a two part assembly. The forward part has a hinge attached at a permanent position at the ram air inlet.
The aft part has a free hinge attached on the aft side of the forward part. The aft side of the aft part mounts on slide blocks.
The actuator turns a torque tube that attaches to the aft part of the door behind the hinge.
BEJ ALL POST SB 777-21-0059
Physical Description
The ram air inlet door is a two part assembly. The forward part has a hinge attached at a permanent position at the ram air inlet.
EFFECTIVITY
BEJ ALL
The aft part has a free hinge attached on the aft side of the forward part. The aft side of the aft part mounts on swing links.
The actuator turns a torque tube that attaches to the aft part of the door behind the hinge.
BEJ ALL
Location
The ram air inlet doors are on the bottom of the airplane forward of the ECS bay doors.
Functional Description
A close or open signal from the CTC operates the actuator motor in the necessary direction.
A rotary variable differential transformer (RVDT) in the actuator sends the position of the door to the CTC.
Training Information Point
When you change a component of the ram air inlet system, measure the closed position of the door. If it is necessary, adjust the actuator to get the correct measurement.
21-52-00
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AIR CONDITIONING -PACK CLG AND MIX MANIFOLD TEMP CTRL -RAM AIR INLET DOOR AND ACTUATOR
WARNING: MAKE SURE THAT PERSONNEL ARE CLEAR OF THE RAM AIR INLET DOOR, LINKAGE AND ACTUATOR BEFORE YOU DO THIS SPECIAL FUNCTION. POSSIBLE INJURY TO PERSONNEL CAN OCCUR.
The ram air inlet doors are normally open with the airplane on the ground. You use a MAT special function to close the ram air door if necessary.
EFFECTIVITY BEJ ALL 21-52-00
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AIR CONDITIONING -PACK CLG AND MIX MANIFOLD TEMP CTRL -RAM AIR INLET DOOR AND ACTUATOR
EFFECTIVITY BEJ ALL PRE SB 777-21-0059 21-52-00
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AIR CONDITIONING -PACK CLG AND MIX MANIFOLD TEMP CTRL -RAM AIR INLET DOOR AND ACTUATOR
EFFECTIVITY BEJ ALL POST SB 777-21-0059 21-52-00
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D633W101-BEJ May 05/2003
777 AIRCRAFT MAINTENANCE MANUAL
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