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C. Prepare for the Test
SUBTASK 27-81-00-860-042
(1) Do this task: Supply Electrical Power, TASK 24-22-00-860-811.
SUBTASK 27-81-00-860-043
WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES AND THE
NOSE GEAR WHEN HYDRAULIC POWER IS SUPPLIED. THE AILERONS, ELEVATORS,
RUDDER, FLAPS, SLATS, SPOILERS, STABILIZER, AND THE NOSE GEAR ARE
SUPPLIED WITH POWER BY THE HYDRAULIC SYSTEMS. INJURIES TO PERSONS OR
DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
(2) To pressurize hydraulic system B, do this task: Hydraulic System A or B Pressurization with
an Engine-Driven Pump (EDP) , TASK 29-11-00-860-804.
D. Leading Edge Flap and Slat Timing Test in Primary Mode
SUBTASK 27-81-00-720-001
WARNING: MAKE SURE PERSONS AND EQUIPMENT ARE CLEAR OF THE LEADING EDGE AND
TRAILING EDGE CONTROL SURFACES. THE LEADING EDGE AND TRAILING EDGE
CONTROLS SURFACES CAN EXTEND AND RETRACT QUICKLY. THIS CAN CAUSE
INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) Do a timing test of the leading edge flap and slat control system in primary mode:
NOTE: Measure the time intervals between the time the surfaces start to move to the time the
surfaces stop moving.
(a) If the flap control lever is not in the UP position, do these steps:
1) Move the flap control lever to the UP position.
2) Let the leading edge flaps and slats and the trailing edge flaps move to the retract
position.
(b) Move the flap control lever to the 5-unit detent position.
1) Make sure the leading edge flaps extend fully in 5.5 to 7.5 seconds.
2) Make sure the leading edge slats move to the extend position in 7.5 to 9.5 seconds.
(c) Move the flap control lever to the 10-unit detent.
1) Make sure the leading edge slats move to the full extend position in 2.5 to 3.5 seconds.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-81-00
Page 552
Jun 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
(d) Make sure the LE indication flaps EXTEND and slats FULL EXTEND lights on the aft
overhead panel are on (Figure 505).
(e) Move the flap control lever to the 1-unit detent position.
1) Make sure the leading edge slats move to the extend position in 3.5 to 4.5 seconds.
2) Let the trailing edge flaps move to the correct position.
(f) Move the flap control lever to the UP detent position.
1) Make sure the leading edge flaps move to the retract position in 7.0 to 9.0 seconds.
2) Make sure the leading edge slats move to the retract poisition in 6.5 to 8.5 seconds.
(g) Make sure the LE indication flaps and slats TRANSIT, EXTEND and FULL EXTEND lights on
the aft overhead panel are off.
E. Put the Airplane Back to Its Usual Condition
SUBTASK 27-81-00-860-044
(1) Do this task: Hydraulic System A or B Power Removal, TASK 29-11-00-860-805.
------------------------- END OF TASK ---------------------------
TASK 27-81-00-710-801
7. Leading Edge Flap and Slat System Standby Actuation Operational Test
A. General
(1) The alternate control system uses electrical power to power the standby hydraulic system which
moves the leading edge slats and flaps.
B. 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)
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)
C. Location Zones
Zone Area
211 Flight Compartment - Left
212 Flight Compartment - Right
D. Prepare for the Operational Test
SUBTASK 27-81-00-860-063
(1) Do this task: Supply Electrical Power, TASK 24-22-00-860-811.
SUBTASK 27-81-00-860-064
(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.
E. Leading Edge Standby System Operational Test
SUBTASK 27-81-00-860-065
(1) Move the ALTERNATE FLAPS ARM switch on the P5 panel to the ARM position (Figure 506).
NOTE: The standby hydraulic pump motor will operate when the ALTERNATE FLAPS ARM
switch is in the ARM position.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-81-00
Page 553
Feb 10/2006
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
SUBTASK 27-81-00-860-066
(2) Move the flap control lever to the 10-unit position.
NOTE: This will decrease the load on the flap electric motor. The leading edge and trailing
edge surfaces will not move when you move the flap control lever.
SUBTASK 27-81-00-710-003
　
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