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stay off.
(g) Wait until the FSEU display shows LE UCM SHUTOFF?.
NOTE: This will take approximately 75 seconds.
(h) Make sure the leading edge flaps and slats move to the extend position.
F. Put the Airplane Back to Its Usual Condition
SUBTASK 27-81-00-860-078
(1) Push the ON/OFF button on the front panel of the FSEU to turn the display off.
SUBTASK 27-81-00-860-079
(2) Move the flap control lever to the UP position to retract the flaps and slats.
SUBTASK 27-81-00-410-004
(3) Close this access panel:
Number Name/Location
117A Electronic Equipment Access Door
SUBTASK 27-81-00-860-055
(4) To remove pressure from hydraulic system B, do this task: Hydraulic System A or B Power
Removal, TASK 29-11-00-860-805.
------------------------- END OF TASK ---------------------------
TASK 27-81-00-710-802
11. Standby Hydraulic System Leading Edge Uncommanded Motion Test
(Figure 506)
A. References
Reference Title
24-22-00-860-811 Supply Electrical Power (P/B 201)
24-22-00-860-812 Remove Electrical Power (P/B 201)
29-11-00-860-801 Hydraulic System A or B Pressurization (P/B 201)
29-11-00-860-805 Hydraulic System A or B Power Removal (P/B 201)
B. Location Zones
Zone Area
211 Flight Compartment - Left
212 Flight Compartment - Right
C. Prepare for the test
SUBTASK 27-81-00-860-073
(1) Do this task: Supply Electrical Power, TASK 24-22-00-860-811.
SUBTASK 27-81-00-860-074
WARNING: BE CAREFUL WHEN YOU ACCESS CIRCUIT BREAKERS INSIDE THE P91 AND P92
PANELS AND POWER IS SUPPLIED TO THE PANELS. THERE IS A POTENTIAL FOR
ELECTRIC SHOCK HAZARD. POSSIBLE INJURY TO PERSONNEL AND DAMAGE TO
EQUIPMENT CAN OCCUR.
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(WARNING PRECEDES)
(2) Make sure that these circuit breakers are closed:
F/O Electrical System Panel, P6-2
Row Col Number Name
A 8 C00211 FLIGHT CONTROL FSEU DC 1
A 9 C01468 FLIGHT CONTROL FSEU DC 2
A 11 C01443 FC TE FLAP POS/SKEW SNSR & IND RIGHT
A 12 C00213 FC TE FLAP POS/SKEW SNSR & IND LEFT
C 11 C00362 FLIGHT CONTROL SHUTOFF VALVES STBY RUD
Power Distribution Panel Number 2, P92
Row Col Number Name
F 2 C01449 STANDBY HYDRAULIC PUMP
SUBTASK 27-81-00-860-080
(3) Make sure the leading edge flaps and slats and the trailing edge flaps are in the retracted
position:
WARNING: KEEP PERSONS AND EQUIPMENT CLEAR OF THE FLIGHT CONTROL SURFACES,
THE THRUST REVERSERS, AND THE LANDING GEAR. THESE COMPONENTS
CAN MOVE SUDDENLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN
CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(a) Supply system B hydraulic power, do this task: Hydraulic System A or B Pressurization,
TASK 29-11-00-860-801.
(b) Move the flap control lever to the UP position to move the leadinge edge flaps and slats and
the trailing edge flaps to the retracted position.
(c) Remove system B hydraulic power, do this task: Hydraulic System A or B Power
Removal, TASK 29-11-00-860-805.
D. Standby Hydraulic System Leading Edge Uncommanded Motion Test
SUBTASK 27-81-00-720-003
(1) Pressurize the standby hydraulic system:
(a) Set the ALTERNATE FLAPS on the forward overhead panel P5 to the ARM position.
NOTE: This will start the standby hydraulic pump.
(b) Make sure the STANDBY HYD LOW PRESSURE light on the P5 panel comes on and quickly
goes out.
NOTE: This makes sure that the standby system is pressurized.
SUBTASK 27-81-00-210-004
(2) Observe the leading edges on both the left and right wings:
(a) Make sure that the leading edges do not move when you pressurize the standby hydraulic
system.
NOTE: The leading edge flaps can slowly extend because of gravity.
E. Put the Airplane Back to Its Usual Condition
SUBTASK 27-81-00-860-075
(1) Move the ALTERNATE FLAPS ARM switch on the forward overhead panel to the OFF position.
NOTE: This will turn off the standby hydraulic system.
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SUBTASK 27-81-00-860-076
(2) Do this task: Remove Electrical Power, TASK 24-22-00-860-812.
------------------------- END OF TASK ---------------------------
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