(2)
Put the valve motor on the shutoff valve.
S 862-024
S 862-025
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A 737-300/400/500MAINTENANCE MANUAL
S 422-026
(3)
Engage the motor drive with the valve cam.
S 432-027
(4)
Install the four screws to attach the valve motor to the shutoff valve.
S 432-028
(5)
Install lockwire on the screws.
S 432-029
(6)
Install the electrical connector on the valve motor.
S 862-045
(7)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P6-2 Circuit Breaker Panel
1) FLAP SHUTOFF VALVES
S 712-030
(8) Do a test of the shutoff valve.
TASK 27-81-91-712-031
6. Standby Drive Shutoff Valve Test
________________________________
A. References
(1)
24-22-00/201, Manual Control
(2)
27-81-00/201, Leading Edge Flap and Slat Control System
B.
Access
(1)
Location Zone
101 Control Cabin, LH
102 Control Cabin, RH
216 Main Wheel Well, LH
C.
Procedure
(1)
Supply electrical power (24-22-00/201).
S 862-032
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A 737-300/400/500MAINTENANCE MANUAL
S 862-054
(2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6-2 Circuit Breaker Panel
1) ALT TE FLAP DRIVE AC
S 862-033
(3)
Put the flap shutoff valve lever at position 1.
S 862-034
(4)
Pressurize hydraulic system B (Ref 27-81-00/201).
S 862-035
(5)
Put the flap control lever to the FLAP UP detent.
S 862-036
(6)
Put the alternate flap arm switch to ARM.
(a)
Make sure the STANDBY HYD LOW PRESSURE light comes on.
(b)
Make sure the standby hydraulic pump starts.
(c)
Make sure the STANDBY HYD LOW PRESSURE light is off.
S 862-037
(7)
Put the alternate flap control switch to DOWN.
(a)
Make sure the flap shutoff valve lever is at position 2.
(b)
Make sure the leading edge flaps and slats fully extend.
S 862-053
(8)
Put the alternate flap control switch to OFF.
(a)
Make sure the leading edge flaps and slats do not move.
S 862-049
(9)
Put the alternate flap arm switch to OFF.
S 862-052
(10)
Make sure the flap shutoff valve lever moves to position 1.
(11)
Make sure the leading edge flaps and slats fully retract.
S 862-050
NOTE: The leading edge flaps and slats retract because of the
____
pressurization of hydraulic system B.
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A
737-300/400/500MAINTENANCE MANUAL
S 872-051
(12)
Operate the leading edge devices to bleed the standby hydraulic system:
(a)
Put the flap control lever to the FLAP UP detent.
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