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 (f) (g) (h) (i) (j) (k) (l) (m) (n)  Make sure the ELEC 1, HYD PUMPS B switch (P5 panel) is in the OFF position.Attach a DO-NOT-OPERATE tag on the ELEC 1, HYD PUMPS B switch.Install the lock on the standby hydraulic module (Fig. 201): 1) Disconnect the electrical connector from the leading edge devices shutoff valve at the standby hydraulic module. 2) Make sure the override lever at the leading edge devices shutoff valve is in position 1. 3) Install the lock on the shutoff valve. 4) Install the lockpin.Put the ENG 2 HYD PUMPS B switch (P5 panel) in the OFF position.Attach a DO-NOT-OPERATE tag on the ENG 2 HYD PUMPS switch.Attach a DO-NOT-OPERATE tag on system B ground pressurization module in the rear end of the forward right hand air conditioning compartment (next to the wheel well/forward end).Supply electrical power (AMM 24-22-00/201).Set the alternate flap arm switch to ARM.Make sure the standby hydraulic system low pressure light is ON.
 (o)  Monitor the leading edge flaps and slats for 60 seconds.
 NOTE:____ The leading edge flaps can slowly extend because of gravity.
 (p)  Extend the trailing edge flaps in the alternate (fully electric) mode with the steps that follow:

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A 737-300/400/500MAINTENANCE MANUAL
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE
_______ LEADING EDGE CONTROL SURFACES. THE LEADING EDGE CONTROL SURFACES CAN EXTEND AND RETRACT QUICKLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 CAUTION: MAKE SURE THE INBOARD AND OUTBOARD FAN DUCT COWLS AND
_______ THE THRUST REVERSERS ARE CLOSED OR REMOVED IF YOU NEED TO EXTEND THE LEADING EDGE FLAPS AND SLATS. THERE IS NOT SUFFICIENT CLEARANCE FOR THE FLAPS AND SLATS TO EXTEND IF THE INBOARD AND OUTBOARD FAN DUCT COWLS AND THE THRUST REVERSERS ARE IN THE OPEN (MAINTENANCE) POSITION. THIS CAN CAUSE DAMAGE TO EQUIPMENT.
 1)  Move the flap control lever to FLAP DOWN (40-unit) detent and make sure the trailing edge flap position agrees with the flap control lever detent.
 NOTE: The flap control lever is moved to the flap detent
____ that is the same as the trailing edge flap position. This is to prevent accidental trailing edge flap movement when the hydraulic system is pressurized.
 CAUTION: MAKE SURE THE ALTERNATE FLAP DRIVE UNIT IS KEPT TO A
_______ LIMIT OF 4 MINUTES OPERATION AND 25 MINUTES OFF. THIS WILL PREVENT THE ALTERNATE FLAP DRIVE UNIT FROM DAMAGE.
 2)  Set the alternate flap control switch to the DOWN position. Hold the switch in this position until the trailing edge flaps extend.
 (q)  Retract the trailing edge flaps in the alternate (fully electric) mode with the steps that follow: 1) Move the flap control lever to the FLAP UP detent and make
 sure that the trailing edge flap position agrees with the flap control lever detent.
 NOTE: The flap control lever is moved to the flap detent
____ that is the same as the trailing edge flap position. This is to prevent accidental trailing edge flap movement when the hydraulic system is pressurized.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 2)  Set the alternate flap control switch to the UP position. Hold the switch in this position until the trailing edge flap motor stops.
 NOTE:____ Retraction of the trailing edge flaps is controlled by a limit switch.
 (r) (s) (t) (u)  Set the alternate flap control switch to OFF.Set the alternate flap arm switch to OFF.Remove electrical power (AMM 24-22-00/201).Remove the DO-NOT-OPERATE tag from the ELEC 1, HYD PUMPS B switch.
 (v)  Remove the DO-NOT-OPERATE tag from the ENG 2 HYD PUMPS B switch.
 (w) (x) (y) (z)  Put the ENG 2 HYD PUMP switch (P5 panel) back to the ON position.Make sure the ELEC 1, HYD PUMPS SYS B switch is in the ON position.Remove the DO-NOT-OPERATE tag from the system B ground pressurization module in the rear end of the forward right hand air conditioning compartment (next to the wheel well/forward end).Remove the DO-NOT-CLOSE tags and close these circuit breakers: 1) P6-2 Circuit Breaker Panel a) PTU/LG BYP V CONT 1 b) PTU/LG BYP V CONT 2 2) P6-11 Circuit Breaker Panel a) STBY HYD PUMP NORMAL b) ELEC HYD PUMPS SYS B 3) P6-12 Circuit Breaker Panel a) STBY HYD PUMP (ALT)
　
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