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(c) Install the bolts [43], washers [45], and nuts [46] back to the jackscrew gearbox [24].
SUBTASK 27-41-81-020-004
(2) Remove the cable drum guard [67] and spacers [26] from the cable drum [27]:
(a) Remove the bolts [63] and washers [64] from the support plate [62].
(b) Remove the bolts [48] and washers [49] that attach the cable drum guard [67] to the cable
drum [27].
(c) Remove the nut [60], washer [59], washer [58], and bolt [57] that attaches the cable drum
guard [67] to the support plate [62].
(d) Remove the cable drum guard [67] and spacers [26].
SUBTASK 27-41-81-020-005
CAUTION: KEEP TENSION ON THE CABLE AT ALL TIMES. WHEN THE CABLE IS DISCONNECTED
FROM THE AFT CABLE DRUM, TENSION NEEDS TO BE KEPT ON THE CABLE SO
THAT THE CABLE DOES NOT BECOME CAUGHT IN THE CABLE GUARDS ON THE
FORWARD CABLE DRUM. THIS CAN CAUSE DAMAGE TO THE CABLE AND THE
CABLE MAY NEED TO BE REPLACED.
(3) Disconnect the STB cable [65] from the cable drum [27]:
(a) Use the force gauge, COM-1557 on the stabilizer trim wheel handle to put a 50 lb (22.7 kg)
load on the STA cable [66].
NOTE: This will keep the STA cable [66] on the drum, which will make the removal of the
STB cable [65] easier.
SUBTASK 27-41-81-480-001
(4) Install the wrench, SPL-1684 on the internal spline of the jackscrew gearbox [24].
SUBTASK 27-41-81-020-006
(5) Move the jackscrew [23] to put the stabilizer leading edge to the full up position.
CAUTION: MAKE SURE YOU DO NOT DAMAGE OR KINK THE CABLE WHILE UNWINDING IT
FROM THE FORWARD CABLE DRUM. IF YOU UNWIND THE CABLE TOO FAST
OFF OF THE FORWARD CABLE DRUM, DAMAGE MAY OCCUR TO THE END OF
THE CABLE IF IT BECOMES KINKED BETWEEN THE CABLE GUARD AND THE
CABLE DRUM AS THE LAST WRAP OF CABLE IS REMOVED FROM THE DRUM.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-41-81
Page 403
Jun 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
(CAUTION PRECEDES)
CAUTION: MAKE SURE YOU ALWAYS KEEP TENSION ON THE CABLE WHILE UNWINDING IT
FROM THE FORWARD DRUM. IF YOU DO NOT KEEP TENSION ON THE CABLE,
THE CABLE MAY BECOME CAUGHT IN THE CABLE GUARDS ON THE FORWARD
CABLE DRUM AND DAMAGE TO THE CABLE MAY OCCUR.
(a) When the stabilizer starts to move, pull the STB cable [65] into the tail compartment and
wind it on a spool or a reel.
NOTE: It is recommended that a mechanic watch the cable unwind from the forward
cable drum to make sure that no damage occurs to the cable as the last three
wraps of cable are slowly unwound from the cable drum.
(b) When the ballnut [28] touches the stops, keep a record of the number of turns of the STA
cable [66] on the cable drum [27].
CAUTION: KEEP TENSION ON THE CABLE AT ALL TIMES. WHEN THE CABLE IS
DISCONNECTED FROM THE AFT CABLE DRUM, TENSION NEEDS TO BE KEPT
ON THE CABLE SO THAT THE CABLE DOES NOT BECOME CAUGHT IN THE
CABLE GUARDS ON THE FORWARD CABLE DRUM. THIS CAN CAUSE DAMAGE
TO THE CABLE AND THE CABLE MAY NEED TO BE REPLACED.
(c) Disconnect the cable STA [66] from the cable drum [27].
SUBTASK 27-41-81-480-002
(6) Install the control cable clamp, SPL-1569 to the cables and attach DO-NOT-OPERATE tags to the
stabilizer trim wheels.
SUBTASK 27-41-81-480-003
WARNING: MAKE SURE YOU INSTALL THE LOCK, F80027-13. THE STABILIZER LEADING EDGE
CAN MOVE UP QUICKLY WHEN YOU DISCONNECT THE JACKSCREW. THIS CAN
CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(7) Install the lock, SPL-1678 on the jackscrew fitting assembly [21] (Figure 403):
(a) Install the lower horizontal stabilizer lock.
CAUTION: DO NOT MOVE THE JACKSCREW FITTING ASSY INTO THE HORIZONTAL
STABILIZER LOCKS, F80027-13. THIS CAN CAUSE DAMAGE TO EQUIPMENT.
(b) Turn the motor shaft or cable drum by hand to move the stabilizer leading edge down until
the stabilizer truss touches the horizontal stabilizer lock.
(c) Install the upper horizontal stabilizer lock.
SUBTASK 27-41-81-480-004
(8) Install the equipment, SPL-1728 to the jackscrew gearbox [24] (Figure 403):
(a) Install the hoist adapter to the sleeve of the jackscrew gearbox [24].
(b) Install the hoist bar between the frames at the top of the stabilizer trim compartment.
(c) Attach the hoist to the hoist bar and connect it to the hoist adapter.
SUBTASK 27-41-81-020-007
(9) Remove the stabilizer trim actuator [53] from the airplane (Figure 402):
(a) Remove the nut [42], washers [40], and bolt [39] to disconnect the bonding jumper [41] from
the jackscrew gearbox [24].
1) Install the bolt [39], washers [40], and nut [42] back in the jackscrew gearbox [24].
(b) Remove the bolts [54] and washers [55] from the safety strap [56].
　
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