(1)
Location Zone
101 Control Cabin, LH
102 Control Cabin, RH
709 Horizontal Stabilizer, LH
710 Horizontal Stabilizer, RH
C.
Procedure
S 865-001
(1) Supply electrical power (AMM 24-22-00/201).
S 715-049
CAUTION: DO NOT OPERATE THE RIGHT AND LEFT STABILIZER TRIM SWITCHES AT
_______ THE SAME TIME AND IN OPPOSITE DIRECTIONS. THIS CAN CAUSE DAMAGE TO THE MOTOR.
(2) Do a test of the horizontal stabilizer trim control system:
NOTE: You can tell there is a motor failure if the manual trim
____ wheel will not turn when you operate the stabilizer trim switch. The manual and autopilot system will operate as usual.
(a) Turn the Captain's stabilizer-trim wheel counterclockwise until it touches the stops. 1) Make sure the stabilizer moves up freely through the full
travel.
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737-300/400/500MAINTENANCE MANUAL
2) Make sure the stabilizer trim indicators on the control stand show 0.0 +/- 0.5 units of trim.
(b)
Turn the Captain's stabilizer-trim wheel clockwise until it touches the stops. 1) Make sure the stabilizer moves down freely through the full
travel. 2) Make sure the stabilizer trim indicators on the control stand show 17.0 +/- 0.5 units of trim.
(c)
Move the STAB TRIM switch on the captain's control wheel momentarily to NOSE DN. 1) Make sure that the stabilizer leading edge moves up.
(d)
Move the STAB TRIM switch on the first officer's control wheel momentarily to NOSE DN. 1) Make sure that the stabilizer leading edge moves up.
(e)
Turn the Captain's stabilizer-trim wheel counterclockwise until the stabilizer trim indicators show 5-7 units of trim. 1) Make sure the stabilizer leading edge moves up.
(f)
Move the STAB TRIM switch on the captain's control wheel momentarily to NOSE UP. 1) Make sure that the stabilizer leading edge moves down.
(g)
Move the STAB TRIM switch on the first officer's control wheel momentarily to NOSE UP. 1) Make sure that the stabilizer leading edge moves down.
S 865-043
(3) If the electrical power is not necessary, remove the electrical power (AMM 24-22-00/201).
TASK 27-41-00-825-051
3. Horizontal Stabilizer Trim System Adjustment (Fig. 501, Fig. 502)____________________________________________
A. General
(1)
To do this task, you adjust these components:
(a)
The stabilizer trim system cables
(b)
The stabilizer trim forward mechanism chain
(c)
The stabilizer trim position indicator.
B.
Special Tools and Equipment
(1)
F80055-1 - Actuator Trammel Bar
C.
Standard Tools and Equipment
(1)
Spring Scale - 0-60 pound capacity
(2)
Tensiometer - 0-450 pound capacity
D.
References
(1)
AMM 27-41-51/401, Column Cutout Switch
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A 737-300/400/500MAINTENANCE MANUAL
Horizontal Stabilizer Trim System Adjustment
Figure 501 (Sheet 1)
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737-300/400/500MAINTENANCE MANUAL
LBL
7.00
0.72
INCH (18.28 mm) MINIMUM
1.40
INCH (35.56 MM) MAXIMUM
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