*
Left and right CTC status, active or off
*
Left or right upper flow control valves set to close
*
Left or right lower flow control valves set to close.
These are the inputs from the duct leak and overheat detection system (DLODS):
*
left and right strut overheat
*
Left and right wing overheat
*
Body overheat.
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ENGINE AIR SUPPLY SYSTEM -ASCPC -POWER AND ARINC 629 INPUTS
Position of the cargo heat shutoff and temperature control valves is from the left and right environmental control system miscellaneous card (ECSMC).
The engine electronic control (EEC) gives high pressure 15th stage (PS 3) bleed air source pressure, N1 speed, and ambient pressure (P 0).
These inputs are from the electrical load management system (ELMS):
*
Sensed cabin pressure from remote sensor
*
Airplane on standby power only
*
Battery bus section 2 status, on/off.
These inputs are from the flap/slat electronics unit (FSEU):
*
ADP(s) necessary for flap/slat movement
*
Slat position.
The hydraulic interface module (HYDIM) gives air driven pump (ADP) status for ON/OFF intermittent operation or on for landing gear retraction.
The overhead panel ARINC 629 system (OPAS) gives inputs for the positions of these switches:
*
APU bleed air switch
*
Left and right engine bleed air switches
*
Left, center, and right isolation switches
*
Left and right trim air switches
*
Left and right engine start/ignition switches
*
Left and right pack switches
*
Forward and aft outflow valve switches
*
Landing altitude selector
*
Forward and aft cargo fire arm switches.
The warning electronic system (WES) gives input for a stall condition.
Weight-on-wheels (WOW) cards give air/ground inputs.
EFFECTIVITY BEJ ALL 36-11-00
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ENGINE AIR SUPPLY SYSTEM -ASCPC -POWER AND ARINC 629 INPUTS
EFFECTIVITY BEJ ALL 36-11-00
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D633W101-BEJ Jan 05/2002
ENGINE AIR SUPPLY SYSTEM -ASCPC -ARINC 429 INPUTS/OUTPUTS
ARINC 429 Inputs/Outputs
The cabin pressurization control part of the left and right ASCPCs interface with the control units of the forward and aft pressurization outflow valves through ARINC 429 buses. The left ASCPC has interfaces with the left control channels of the forward and aft control units. The right ASCPC has interfaces with the right control channels of the forward and aft control units.
EFFECTIVITY BEJ ALL 36-11-00
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ENGINE AIR SUPPLY SYSTEM -ASCPC -ARINC 429 INPUTS/OUTPUTS
EFFECTIVITY BEJ ALL 36-11-00
Page 51
D633W101-BEJ Jan 05/2002
ENGINE AIR SUPPLY SYSTEM -ASCPC -DISCRETE AND ANALOG INPUTS/OUTPUTS
Discrete Inputs
Discrete inputs to the digital and analog parts of the ASCPC are hardwired.
These are the discrete inputs to the digital part of the left ASCPC:
*
L engine running, AIMS
*
Other engine running, AIMS
*
L engine bleed air switch position, ON/OFF
*
START position of the L engine start switches
*
APU fire switch position, NORM/FIRE
*
L engine fire switch position, NORM/FIRE
*
L strut/wing overheat is from the duct leak and overheat detection system (DLODS).
The discrete inputs to the digital part of the right ASCPC are the same type as the left ASCPC except they are from right system components. The APU fire switch also inputs to the right ASCPC.
These are the discrete inputs to the analog part of the left ASCPC:
*
L engine running, AIMS
*
L engine bleed air switch position, ON/OFF
*
START position of the L engine start switches
*
L engine fire switch position, NORM/FIRE
*
L strut/wing overheat is from the duct leak and overheat detection system (DLODS).
The discrete inputs to the analog part of the right ASCPC are the same type as the left ASCPC except they are from right system components.
Discrete Outputs
Discrete outputs are hardwired from the digital and analog parts of the ASCPCs to solenoids, torque motors, indicator lights, and AIMS for EICAS advisory messages.
These are the devices that get discrete outputs from the digital part of the left ASCPC:
*
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