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(3) Move the ALTERNATE FLAPS control switch to the DOWN position to extend the leading edge
flaps and slats to the full extend position.
NOTE: It is not necessary to extend the trailing edge flaps past the 10-unit position.
(a) When the flaps and slats start to extend, make sure all the LE indication flaps and slats
TRANSIT lights, on the aft overhead panel, P5, come on (Figure 505).
(b) Do these checks of the aft overhead lights when the leading edge flaps and slats are in the
full extend position:
1) Make sure all the TRANSIT lights go off.
2) Make sure the flaps EXT lights come on.
3) Make sure the slats FULL EXT lights come on.
SUBTASK 27-81-00-860-067
(4) Move the ALTERNATE FLAPS control switch to the OFF position.
F. Put the Airplane Back to Its Usual Condition
SUBTASK 27-81-00-860-068
WARNING: MAKE SURE THE POSITION OF THE FLAPS AND SLATS AGREES WITH THE POSITION
OF THE FLAP CONTROL LEVER. WHEN YOU PRESSURIZE HYDRAULIC SYSTEM B,
THE FLAPS AND SLATS WILL MOVE AUTOMATICALLY TO THE POSITION OF THE
FLAP CONTROL LEVER WITH THE ALTERNATE CONTROL DISARMED. THIS CAN
CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) Make sure the flap control lever is in the same position as the trailing edge flaps and leading
edge flaps and slats.
SUBTASK 27-81-00-860-069
(2) Move the ALTERNATE FLAPS ARM switch to the OFF position to disarm the alternate control
system.
SUBTASK 27-81-00-860-070
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.
(3) Supply system B hydraulic power, do this task: Hydraulic System A or B Pressurization,
TASK 29-11-00-860-801.
SUBTASK 27-81-00-860-071
(4) Move the flap control lever to the UP position to retract the leading edge flaps and slats and the
trailing edge flaps.
NOTE: The leading edge flaps and slats will not retract with alternate control.
737-600/700/800/900
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SUBTASK 27-81-00-860-072
(5) Remove system B hydraulic power, do this task: Hydraulic System A or B Power Removal,
TASK 29-11-00-860-805.
------------------------- END OF TASK ---------------------------
TASK 27-81-00-700-803
8. Leading Edge Flap and Slat Timing Test in the Standby Mode
A. References
Reference Title
24-22-00-860-811 Supply Electrical Power (P/B 201)
27-81-00-860-804 Leading Edge Flaps and Slats Retraction (P/B 201)
B. Location Zones
Zone Area
211 Flight Compartment - Left
212 Flight Compartment - Right
C. Prepare for the Test
SUBTASK 27-81-00-860-045
(1) Do this task: Supply Electrical Power, TASK 24-22-00-860-811.
SUBTASK 27-81-00-860-046
(2) If the leading edge flaps and slats are not in the retract position, do this task: Leading Edge
Flaps and Slats Retraction, TASK 27-81-00-860-804.
D. Leading Edge Flap and Slat Timing in the Standby Mode
SUBTASK 27-81-00-710-001
(1) Do the leading edge flap and slat timing test in the standby mode:
NOTE: The leading edge flaps and slats do not retract in the standby mode.
(a) Put the ALTERNATE FLAPS arm switch, on the overhead panel, P5, in the ARM position
(Figure 506).
(b) Move the ALTERNATE FLAPS control switch to the DOWN position for 5 seconds, then
release.
(c) When the flaps and slats start to extend, make sure all the LE indication flaps and slats
TRANSIT lights, on the aft overhead panel, P5, come on.
(d) Make sure the leading edge flaps extend in 29 to 37 seconds.
(e) Make sure the leading edge slats extend in 43 to 55 seconds.
(f) Do these checks when the leading edge flaps and slats are in the full extend position
(Figure 505);
1) Make sure all the TRANSIT lights go off.
2) Make sure the flaps EXT lights come on.
3) Make sure the slats FULL EXT lights come on.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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E. Put the Airplane Back to Its Usual Condition
SUBTASK 27-81-00-860-047
(1) Do this task: Leading Edge Flaps and Slats Retraction, TASK 27-81-00-860-804.
------------------------- END OF TASK ---------------------------
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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Feb 10/2006
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737-600-700-800-900 飞机维护手册7 AIRCRAFT MAINTENANCE MANUA(57)
