(d)
Put the alternate flap arm switch to the ARM position.
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE
_______ LEADING EDGE CONTROL SURFACES. THE LEADING EDGE CONTROL SURFACES CAN EXTEND AND CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
CAUTION: MAKE SURE THAT THE INBOARD FAN DUCT COWL AND THE THRUST
_______ REVERSERS ARE CLOSED OR REMOVED. FAILURE TO CLOSE OR REMOVE THE INBOARD FAN DUCT COWL AND THE THRUST REVERSERS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
CAUTION: MAKE SURE THAT THE ALTERNATE FLAP DRIVE UNIT IS LIMITED TO
_______ 4 MINUTES OPERATION AND 25 MINUTES OFF. FAILURE TO DO THIS CAN CAUSE DAMAGE TO THE DRIVE UNIT.
(e)
Set the alternate flap control switch to the DOWN position momentarily then release to off.
(f)
Set the alternate flap arm switch to the OFF position.
1) Make sure that the leading edge flaps and slats fully retract.
(g)
Do steps (d) and (e) again to operate the leading edge flaps and the slats a minimum of two full cycles to bleed air from the system.
(h)
Complete the operation with the alternate flap arm switch in the OFF position to put the leading edge devices in the retracted position.
(i)
Set the Position System B Flight Control switch to the ON position.
(j)
Set the Position System A Flight Control switch to the ON position.
(k)
Move the flap control lever to the 1-unit detent to extend the leading edge flaps.
(l)
Examine the hydraulic fittings on the actuator for leakage.
(m)
Release pressure from the hydraulic system B
(Ref 27-81-00/201).
(n)
Put the alternate flap arm switch in the ARM position.
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737-300/400/500MAINTENANCE MANUAL
(o)
Make sure that the standby hydraulic system low pressure light is off.
(p)
Monitor the leading edge flaps and slats for 60 seconds.
(q)
Make sure that the flaps and slats do not extend.
NOTE: The leading edge flaps can slowly extend because of
____
gravity.
(r)
Set the ALT FLAP arming switch in the OFF position.
E.
Put the Airplane Back to Its Usual Condition
S 864-030
(1)
Move the flap control lever to the FLAP UP detent to retract the slats.
S 864-022
(2)
Remove electrical power if it is not necessary (Ref 24-22-00/201).
S 864-031
(3)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
PTU circuit breaker C1081 and C1085.
S 414-020
(4)
Install the access panels adjacent to the actuator and panel aft of the actuator door.
S 614-032
(5)
Service the hydraulic reservoirs if it is necessary
(Ref 12-12-00/301).
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737-300/400/500MAINTENANCE MANUAL
LEADING EDGE SLAT ACTUATOR - INSPECTION/CHECK
_____________________________________________
1. General_______
A. This procedure contains the task to do a check of the actuator of the leading edge slat.
TASK 27-81-41-206-001
2. Leading Edge Slat Actuator Inspection/Check___________________________________________
A. References
(1)
AMM 27-81-41/401, Leading Edge Slat Actuator
(2)
Location Zones 302 Wing Outboard Leading Edge with Slats, LH 402 Wing Outboard Leading Edge with Slats, RH
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