(a)
Asymmetrical erosion of the upper and lower surfaces of the vane.
(b)
Asymmetrical pattern of nicks on the vane.
(c)
Deterioration of the sensor index pins.
(d)
A bent vane shaft.
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A 737-300/400/500MAINTENANCE MANUAL
Angle of Airflow Sensor Check
Figure 601
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A
737-300/400/500MAINTENANCE MANUAL
S 986-004
(3)
Slowly turn the AOA sensor between its stops (approximately 70°).
(a)
Make sure that only light torque is necessary to turn the sensor.
(b)
Make sure that there is no change in the torque.
(c)
If there is too much friction when you turn the vane, replace the AOA sensor (AMM 27-32-11/401).
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A
737-300/400/500MAINTENANCE MANUAL
STALL WARNING TEST MODULE - REMOVAL/INSTALLATION
________________________________________________
1. General_______
A. This procedure has two tasks:
(1)
Stall Warning Test Module Removal
(2)
Stall Warning Test Module Installation
TASK 27-32-21-004-001
2. Stall Warning Test Module Removal (Fig. 401)_________________________________
A. Access
(1)
Location Zone
101, 102 Control Cabin
B.
Procedure
S 864-012
(1)
AIRPLANES WITH DIGITAL STALL WARNING COMPUTER P/N 65-52819; Open these circuit breakers:
(a)
P6 Panel
1) STALL WARN 2 AC
Stall Warning Test Module
Figure 401
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737-300/400/500MAINTENANCE MANUAL
2) STALL WARN 2 DC
(b) P18 Panel
1) STALL WARN 1 AC
2) STALL WARN 1 DC
S 864-013
(2)
AIRPLANES WITH STALL MANAGEMENT COMPUTER P/N 65-52822; Open these circuit breakers:
(a)
P6 Panel
1) SMC 2 CMPTR DC
(b)
P18 Panel
1) SMC 1 CMPTR DC
S 024-005
(3)
Remove the module:
(a)
Hold the module.
(b)
Release the 4 fasteners which attach the module to the aft overhead panel.
(c)
Lower the module from the aft overhead panel.
(d)
Disconnect the electrical connectors from the back of the module.
(e)
Remove the module.
TASK 27-32-21-404-016
3. Stall Warning Test Module Installation (Fig. 401)______________________________________
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