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MAINTENANCE MANUAL
GEN FIELD MANUAL RESET
w FIELD
OFF w
w FIELD
OFF w
w FIELD
OFF w
IDG OIL TEMP
OUT RISE
L R APU FLT CONTROL SHUTOFF
ON w
OFF a
ON w
OFF a
ON w
OFF a
GEN USE ONLY
Flight Control Systems Affected By Shutoff Valve
Figure 3
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MAINTENANCE MANUAL
(2)
The PCA monitor module controls the PCA monitor sensors and is located in the P50 Elec Sys Card File. The module is powered by 28 volts dc from bus L and controlled by PCU MON MOD circuit breaker on panel P11. PCA monitor failure results in a PCU MONITOR EICAS maintenance page message.
C.
Rudder and Elevator Center Hydraulic System Fuses
_________________________________________________
(1)
These hydraulic fuses are installed in the center hydraulic system pressure lines upstream of the rudder and elevator actuators. One fuse is installed for the rudder system and two fuses are installed for the elevator system.
(2)
The fuses sense the hydraulic fluid flow rate to the rudder and elevator systems. In the event of hydraulic line rupture downstream, the fuse will close to prevent loss of hydraulic fluid. This will preserve hydraulic pressure in the system upstream of the fuse.
3. Operation
_________
A. Functional Description
______________________
(1) Shutoff Valve and Indication Operation
______________________________________
(a) With electrical power provided, FLT CONTROL SHUTOFF switch ON, the amber switch light is not on, and the valve opens. When the switch is placed to OFF, the amber switch light comes on and the valve closes. An L, C, or R FLT CONT HYD EICAS message appears.
P50 ELECTRICAL SYSTEM CARD FILE
Rudder and Elevator PCA Monitor Module Installation
Figure 4
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MAINTENANCE MANUAL
SEE A
PCA MONITOR
SENSOR
RUDDER PCA
(EXAMPLE 3 LOCATIONS)
SEE B FWD
A
PCA MONITOR SENSOR
ELEVATOR PCA (EXAMPLE 6 LOCATIONS)
FWD
B
Power Control Actuator Monitor Sensors Figure 5
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MAINTENANCE MANUAL
DC
POWER
SUPPLY
PCA
FAILUREPCA GOOD
+V DC
DETECTION
LOGIC
SPEED < 50KTS
L ELEV PCA FAIL
L ELEV PCU (W)SENSOR
ALL THREE HYD (STATUS & MAINT)
FAILURESENSOR GOOD
_
SYS > 1700 PSI
DETECTIONLOGICON GROUNDON GROUND
PCA
FAILUREPCA GOOD
+V DC
DETECTION
LOGIC
SPEED < 50KTS
RUDDER PCA FAIL
RUDDER PCU (W)SENSOR
ALL THREE HYD (STATUS & MAINT)
FAILURESENSOR GOOD
_
SYS > 1700 PSI
DETECTIONLOGIC ON GROUNDON GROUND
PCA
FAILUREPCA GOOD
+V DC
+V DC
DETECTION
LOGIC
SPEED < 50KTS
R ELEV PCA FAIL R ELEV PCU (W)
SENSOR
ALL THREE HYD (STATUS & MAINT)
FAILURESENSOR GOOD
DETECTION
_
SYS > 1700 PSI
LOGIC ON GROUNDON GROUND
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