(3)
Attach the ballnut to the gimbal.
(a)
On the No. 3 or No. 6 transmission, make sure that the ballnut is installed with the oil reservoir on the outboard side.
(b)
On the No. 4 or No. 5 transmission, make sure that the ballnut is installed with the oil reservoir on the inboard side.
(c)
On the top and bottom sides of the gimbal, attach the ballnut to the gimbal. 1) Apply a layer of BMS 5-95 sealant to the outer surface of the bushing. 2) Put the bushing on the gimbal.
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NOTE: Make sure that the bushing engages the journal on the ballnut.
3) Install the two bolts that attach the bushing to the gimbal. a) Fill each of the two fastener holes used for the bushing fasteners with
BMS 5-95 sealant. b) Install bolts in each of the two fastener holes for a bushing. c) Install a washer and nut on each of the two bolts. d) Tighten the nut on each bolt to 30-40 pound-inches.
(4)
Turn the ballnut on the drivescrew so that the "X" dimension is the same as it was at the time of removal.
(5)
Put the upstop on the screw yoke in the same position it was at the time of removal.
NOTE: This is the initial position of the upstop on the screw yoke in relation to the output shaft. Installation of a drivescrew with the upstop on the screw yoke in this initial position will help to decrease subsequent adjustment.
(6)
Assemble the universal joint:
(a)
Assemble and align the transmission output shaft, the screw yoke and the trunnion cross.
(b)
Apply a layer of BMS 3-24 grease to the cross pin.
(c)
Put the cross pin through the screw yoke and the trunnion cross.
(d)
Apply a layer of the BMS 3-24 grease to the universal joint bolt.
(e)
Put the universal joint bolt through the output shaft, the trunnion cross, and the cross pin.
(f)
Apply a layer of BMS 3-24 grease to the spacer.
(g)
Put the spacer on the universal joint bolt.
(h)
Clean the threads of the universal joint bolt.
(i)
Apply a layer of BMS 5-95 sealant to the threads of the universal joint bolt.
(j)
Install a new self-locking nut on the universal joint bolt.
(k)
Tighten the nut to 170-200 pound-inches.
(l)
Make sure that all the chamfer of the bolt shows when the nut is fully tightened.
(7)
Fill the ballnut reservoir (AMM 12-22-51/201).
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H. Do an Initial Check of the Operation of the Trailing Edge Flaps
(1)
If the drivescrew removal and installation was at the outboard flap transmissions, remove the support.
(2)
Do a check of the operation of the trailing edge flaps and the adjustment of the
drivescrews:
NOTE: This initial check of the operation of the trailing edge flaps is completed with the alternate (electric) mode of operation. Operation of the flaps is slower with this mode of operation than with the primary (hydraulic) mode. This can help to prevent damage if there is a problem during the initial operation of the flaps.
(a)
Supply electrical power (AMM 24-22-0/201).
(b)
Set the arming switch of the ALTERNATE FLAPS to the ARM position.
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU OPERATE THE TRAILING EDGE FLAPS. AN ACCIDENTAL FLAP MOVEMENT CAN CAUSE INJURY 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.
(c)
Move the control switch of the ALTERNATE FLAPS to the UP position and hold until the flaps are fully retracted. 1) Make sure that the movement of the trailing edge flaps is smooth. 2) Make sure that the trailing edge flaps retract symmetrically. 3) Make sure that the drivescrew does not touch the adjacent structure. 4) Make sure that the screw and fitting goes into the screw preload pad
immediately before the flaps are fully retracted. 5) Make sure that the screw and fitting engages the screw preload pad when the flaps are fully retracted.
(d)
Move the control switch of the ALTERNATE FLAPS to the DOWN position and hold until the flaps are fully extended. 1) Make sure that the movement of the trailing edge flaps is smooth. 2) Make sure that the trailing edge flaps extend symmetrically. 3) Make sure that the drivescrew does not touch the adjacent structure.
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