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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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737-300/400/500MAINTENANCE MANUAL
3) Make sure that the ballscrew does not touch the adjacent structure.
(e) Set the arming switch of the ALTERNATE FLAPS to the OFF position.
S 714-055
(4) Do a check of the adjustment of the ballscrew:
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL
_______ CONTROL SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT
(a) Supply system B hydraulic power (AMM 29-15-00/201).
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE
_______ AND TE FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL HANDLE. AN ACCIDENTAL FLAP MOVEMENT CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
CAUTION: DURING THE INITIAL OPERATION OF THE TRAILING EDGE FLAPS,
_______ MONITOR THE OPERATION CAREFULLY. STOP THE OPERATION IMMEDIATELY IF THERE IS INDICATION OF A PROBLEM. FIND AND CORRECT THE CAUSE OF THE PROBLEM BEFORE YOU CONTINUE OPERATION OF THE TRAILING EDGE FLAPS. IF YOU DO NOT FOLLOW THESE STEPS, DAMAGE CAN OCCUR.
(b)
Set the FLAP control lever to the FLAP UP detent to retract the flaps: 1) Make sure that the trailing edge flaps move smoothly. 2) Make sure that the trailing edge flaps retract
symmetrically.
(c)
Remove system B hydraulic power after the flaps are fully retracted (AMM 29-15-00/201).
(d)
At the ballscrew that you removed, do a check of the clearance between the ball nut and screw yoke.
(e)
Make a record of the clearance.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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737-300/400/500MAINTENANCE MANUAL
(f) Compare the clearance before the removal of the ballscrew with the clearance after the installation of the ballscrew. 1) If the two values for clearance are different, adjust the
clearance.
a) Disconnect the torque tube(s) from the transmission.
NOTE: For access to the outboard torque tube coupling
____ at the No. 3 and No. 6 transmissions, remove the access panel outboard of the transmission.
b) Turn the input shaft of the transmission in the direction necessary to adjust the clearance to its initial value.
c) Align and engage the coupling sleeve with the splined couplings of the torque tube and the transmission. d) Install the three screws that attach the coupling sleeve to the coupling. e) Install a lockwire to connect the three screws together. f) If it is necessary, install the outboard access panel of the No. 3 and No. 6 transmissions.
2) If the clearance after the installation of the transmission is the same as the clearance before the removal, no adjustment is necessary.
I. Do an operational test of the flaps:
S 864-069
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) Supply system B hydraulic power (AMM 29-15-00/201).
S 864-066
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
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