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SPL-1752.
(f) Install the magnetic holder of equipment, SPL-1752 and dial indicator, STD-1238 on
jackscrew.
SUBTASK 27-41-81-700-001
(6) Pressurize equipment, SPL-1752 to 900 psi (6205 kPa) -- 950 psi (6550 kPa) with hand hydraulic
pump, STD-1253.
SUBTASK 27-41-81-700-002
(7) If the dial indicator, STD-1238 shows more than 0.025 in. (0.64 mm), then replace the stabilizer
ball nut and jackscrew gearbox. These are the tasks:
Stabilizer Ball Nut and Jackscrew Gearbox Removal, TASK 27-41-81-000-801,
Stabilizer Ball Nut and Jackscrew Gearbox Installation, TASK 27-41-81-400-801.
SUBTASK 27-41-81-080-005
(8) Remove equipment, SPL-1752, dial indicator, STD-1238, and hand hydraulic pump, STD-1253
from the jackscrew.
SUBTASK 27-41-81-860-007
(9) Remove the safety tag and close this circuit breaker:
F/O Electrical System Panel, P6-2
Row Col Number Name
B 10 C00207 FLIGHT CONTROL STAB TRIM CONT
SUBTASK 27-41-81-410-004
(10) Close this access panel:
Number Name/Location
311BL Stabilizer Trim Access Door
------------------------- END OF TASK ---------------------------
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Stabilizer Jackscrew Gearbox Backlash Inspection
Figure 602/27-41-81-990-805
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TASK 27-41-81-200-802
4. Upper and Lower Gimbal Wear Limits Inspection
(Figure 603)
A. General
(1) This procedure gives wear limits and repair data for the upper and lower gimbals.
B. References
Reference Title
27-41-81-000-801 Stabilizer Ball Nut and Jackscrew Gearbox Removal (P/B 401)
27-41-81-400-801 Stabilizer Ball Nut and Jackscrew Gearbox Installation (P/B 401)
C. Tools/Equipment
Reference Description
STD-1096 Micrometer - Depth, 0-1 Inch, Readable to 1/1000 Inch
STD-1097 Caliper - Vernier, 0-6 Inch, Readable to 1/1000 Inch
D. Location Zones
Zone Area
311 Area Aft of Pressure Bulkhead - Left
E. Procedure
SUBTASK 27-41-81-020-013
(1) Remove the stabilizer ball nut and jackscrew gearbox. To remove it, do this task: Stabilizer Ball
Nut and Jackscrew Gearbox Removal, TASK 27-41-81-000-801.
SUBTASK 27-41-81-020-015
(2) Examine the parts of the lower and upper gimbals for worn areas:
(a) Remove the parts to be checked.
(b) Measure the parts as necessary with a micrometer (0-1 Inch, readable to 1/1000 Inch),
STD-1096 or a readable to 1/1000 inch vernier 0 - 6 inch caliper, STD-1097.
(c) Compare the dimensions you measured with the permitted wear dimensions from
(Table 601).
(d) If the parts are not in the tolerance, replace or repair the parts as required.
Table 601/27-41-81-993-807
NAME OF THE PARTS
THAT ARE IN CONTACT
DIM.
DIAMETER DESIGN LIMITS WEAR LIMITS
MINIMUM
inches / mm
MAXIMUM
inches / mm
PERMITTED
MAXIMUM I.D./
MINIMUM O.D.
OF WORN PART
MAXIMUM
SERVICE
DIAMETRIC
CLEARANCE
#1 UPPER GIMBAL
FITTING
I.D. 1.0000 in
25.40 mm
1.0010 in
25.43 mm
1.0020 in
25.45 mm
0.0050 in
#1 UPPER GIMBAL PIN O.D. 0.9980 in
25.35 mm
0.9990 in
25.37 mm
0.9970 in
25.32 mm
0.127 mm
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(Continued)
NAME OF THE PARTS
THAT ARE IN CONTACT
DIM.
DIAMETER DESIGN LIMITS WEAR LIMITS
MINIMUM
inches / mm
MAXIMUM
inches / mm
PERMITTED
MAXIMUM I.D./
MINIMUM O.D.
OF WORN PART
MAXIMUM
SERVICE
DIAMETRIC
CLEARANCE
#2 JACKSCREW
FITTING BUSHING
I.D. 1.0000 in
25.40 mm
1.0010 in
25.43 mm
1.0030 in
25.48 mm
0.0050 in
#2 UPPER GIMBAL PIN O.D. 0.9980 in
25.35 mm
0.9990 in
25.37 mm
0.9970 in
25.32 mm
0.127 mm
#3 YOKE I.D. 1.0000 in
25.40 mm
1.0010 in
25.43 mm
1.0020 in
25.45 mm
0.0050 in
#3 UPPER GIMBAL
BUSHING
O.D. 0.9980 in
25.35 mm
0.9990 in
25.37 mm
0.9960 in
25.30 mm
0.127 mm
#4 OUTBOARD LOWER
　
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