"STA" CABLE (UPPER LIMIT) 3
B
TABLE II
UNITS TRIM  POS. STAB. LE  "B" DIMENSION 
0  3` UP  BALLNUT AGAINST STOP 45.84 (REF) 
1  2` UP  44.42 
2  1` UP  43.00 
3  0`  41.57 
4  1` DOWN  40.15 
5  2` DOWN  38.71 
6  3` DOWN  37.28 
7  4` DOWN  35.84 
8  5` DOWN  34.40 
9  6` DOWN  32.96 
10  7` DOWN  31.51 
11  8` DOWN  30.06 
12  9` DOWN  28.61 
13  10` DOWN  27.16 
14  11` DOWN  25.70 
15  12` DOWN  24.24 
16  13` DOWN  22.79 
17  14` DOWN  BALLNUT AGAINST STOP 21.32 (REF) 

UPPER
STOP

LOWER
STOP

TRAMMEL 
"B" DIMENSION  BAR 
2 

FWD
STABILIZER TRIM JACKSCREW
SHOWN WITH STABILIZER LEADING
EDGE AT ZERO DEGREES

C
1  WHEN RIGGING, THE CABLE LOAD MUST BE IN +40/-10 POUNDS OF THE TABLE I VALUES. IF THE CABLE LOADS DEVIATE MORE THAN +40/-15 POUNDS FROM THE TABLE I VALUES, YOU MUST RE-RIG
2  THE "B" DIMENSION IS MEASURED BETWEEN THE CENTER OF THE UPPER AND LOWER GIMBAL PINS. SEE TABLE II
3  CLEARANCE SHOWN WITH THE STA CABLE IN THE UPPER POSITION. SAME CLEARANCE REQUIRED AT THE LOWER POSITION
Horizontal Stabilizer Trim System Adjustment
Figure 501 (Sheet 2)

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L86400
A

737-300/400/500
MAINTENANCE MANUAL

STABILIZER TRIM
CONTROL SWITCH

COLUMNCONTROL COLUMN CUTOUT SWITCH
STABILIZER TRIM
STABILIZER
CONTROL SWITCH
TRIM WHEEL
STABILIZER POSITION INDICATOR
ELEVATOR
TORQUE TUBE

IDLER SPROCKET
CRANK COLUMN CUTOUT
6. CHAIN SWITCH
ASSEMBLY SEE A1. FLEXIBLE SHAFT
2. AFT SUPPORT LINK
SEEC D
STB CABLE 1
EYEBOLT THREAD
EXTENSION

STA CABLE 1 (3 LOCATIONS)
5. FORWARD
 SUPPORT

A2
LINK
SEE E
A
4. TURNBUCKLE
CABLE DRUM
MECHANISM GEAR HOUSING
12.50 INCHES 3. MECHANISM
 (REF) SPROCKET
1
APPROXIMATELY 4-1/2 TURNS
OF STB CABLE FROM THE TOP
OF THE DRUM AND 28-1/2 TURNS
OF STA CABLE FROM THE BOTTOM
OF THE DRUM WITH THE STABILIZER
IS AT THE FULL AIRPLANE
NOSEDOWN

2
ON THE TWO SIDES OF THE CABLE DRUM
Chain Assembly Adjustment Figure 502 (Sheet 1)
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A
737-300/400/500MAINTENANCE MANUAL
CHAIN LINKS
SEE B LINK
IDLERCHAIN MOVEMENT SPROCKETFORCE POINT
COTTER PIN (2 LOCATIONS)
APPLY A 5 POUND
PERPENDICULAR
FORCE TO THE
CHAIN ASSEMBLY

CHAIN MOVEMENT
0.25 |0.07 INCH
CHAIN LINKS
4.5 |1.0
B
INCH
2. AFT SUPPORT
3. MECHANISM
LINK SPROCKET
UPPER ADJUSTING NUT(2 LOCATIONS)
AFT EYEBOLT THREAD EXTENSION(2 LOCATIONS)
A
VIEW IN THE FORWARD DIRECTION
D
5. FORWARD
FORWARD EYEBOLT SUPPORT
THREAD EXTENSION LINK
2. AFT UPPER
SUPPORT ADJUSTING
LINK NUT
ADJUSTING NUTS
VIEW IN THE FORWARD DIRECTION C
E
Chain Assembly Adjustment
Figure 502 (Sheet 2)

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