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(b) Align the stabilizer trim actuator [53] with structure.
(c) Connect the ballnut [28] to the jackscrew fitting assembly [21]:
1) Make sure the ballnut [28] is installed with the grease fitting toward the access door. If it
is necessary, rotate the ballnut half a turn.
2) Remove the bolts [29] and washers [30] from the upper gimbal pins [31].
3) Remove the upper gimbal fittings [22] and yokes [32] from the ballnut [28].
4) Lubricate the upper gimbal fittings [22] and yokes [32] with grease, D00633.
5) Install the yokes [32] on the ballnut [28].
6) Engage the upper gimbal fittings [22] on the yokes [32].
7) Turn the jackscrew [23] to engage the upper gimbal fittings [22] with the jackscrew
fitting assembly [21].
8) Install the upper gimbal pins [31] to connect the ballnut [28] to the jackscrew fitting
assembly [21].
9) Install bolts [29] and washers [30] to the upper gimbal pins [31].
10) Install the lockwire, G01912 to attach the two bolt heads together on each upper gimbal
pin.
WARNING: DO NOT GET THIS MATERIAL IN YOUR MOUTH, EYES, OR ON YOUR
SKIN. DO NOT BREATHE THE FUMES FROM THIS MATERIAL. PUT ON A
RESPIRATOR,EYE PROTECTION (GOGGLES, OR OTHER APPROVED
PROTECTION) AND GLOVES WHEN YOU USE THIS MATERIAL. MAKE
SURE THAT THERE IS SUFFICIENT AIRFLOW. KEEP THIS MATERIAL
AWAY FROM SPARKS, FLAME, AND HEAT. THIS MATERIAL CAN CAUSE
INJURIES TO PERSONNEL AND DAMAGE TO EQUIPMENT.
11) Apply compound, C00913 to all the bolt holes on the jackscrew fitting assembly [21].
12) Install spacers [35], washers [34] (under the bolts), bolts [33], washers [36] (under the
nuts), and nuts [37].
13) Tighten the nuts [37] by hand, then loosen the nuts [37] to the nearest pin hole.
14) Install the new pins [38].
(d) Apply grease, D00633 to the lower gimbal pins [25].
(e) Install the lower gimbal pins [25] with the grease fitting outboard, washers [50], nuts [51] to
connect the stabilizer trim actuator [53] to the structure.
(f) Tighten the nuts [51] by hand, then tighten them to nearest pin hole.
(g) Install the new pins [52].
(h) Install the washers [55] and bolts [54] with bolt head outboard to connect the stabilizer trim
actuator [53] to the safety strap [56].
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-41-81
Page 416
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
SUBTASK 27-41-81-420-002
(6) Install the bonding jumper [41] to the jackscrew gearbox [24]:
(a) Remove the nut [42], washers [40], and bolt [39] from the jackscrew gearbox [24].
(b) Clean the area around the bolt for electrical bonding.
(c) Install the bolt [39], bonding jumper [41] (below the bolt head), washers [40], and nut [42].
(d) Use bonding meter, COM-1550 to make sure the resistance of the bonding jumper
connection is less than 0.010 ohm.
SUBTASK 27-41-81-080-001
(7) Remove the hoist adapter and equipment, SPL-1728 from the stabilizer trim actuator [53]
(Figure 403):
(a) Remove the hoist adapter from the jackscrew.
(b) Remove the hoist bar and the hoist from the airplane.
SUBTASK 27-41-81-080-002
(8) Remove the lock, SPL-1678.
(a) If it is necessary, install the wire bundle clamps.
SUBTASK 27-41-81-420-003
(9) Connect the STA cable [66] to the cable drum [27] (Figure 402):
(a) With the ballnut against the upper stop, wind the cable STA [66] on the cable drum [27]
approximately 1.8 turns.
(b) Install the cable terminal in the lower terminal slot of the cable drum [27].
(c) Install the new pin [61] to connect the cable terminal to the cable drum [27].
1) Install the ends of the pin [61] in the terminal slot.
CAUTION: MAKE SURE THE CABLE WINDS ONTO THE DRUM GROOVES PROPERLY WITH
EACH ROTATION OF THE DRUM. IF THE CABLE GETS JAMMED BETWEEN THE
CABLE AND THE CABLE DRUM GUARD, DAMAGE TO THE CABLE WILL OCCUR.
(d) Operate the jackscrew to move the stabilizer leading edge to full down position to wind the
cable on the cable drum approximately 50.3 turns.
NOTE: Operate the jackscrew until it stops.
SUBTASK 27-41-81-420-004
CAUTION: KEEP TENSION ON THE CABLE AT ALL TIMES. WHEN THE CABLE IS DISCONNECTED
FROM THE CABLE DRUM, TENSION NEEDS TO BE KEPT ON THE CABLE SO THAT
THE CABLE DOES NOT BECOME CAUGHT IN THE CABLE GUARDS ON THE OTHER
CABLE DRUM. THIS CAN CAUSE DAMAGE TO THE CABLE AND THE CABLE MAY
NEED TO BE REPLACED.
(10) Connect the STB cable [65] to 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 installation of
　
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