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 B.  If the control lever lock system failure condition can not be duplicated on the ground, or if the electrical circuit components and the mechancical components check out OK, then the Main Landing Gear Safety Sensors Adjustment/Test must be performed (AMM 32-09-01/501).
 C.  Gear actuation control system must be correctly rigged.
 D.  Landing gear control lever will be left in OFF position. The following
 precheck items should be performed to simplify trouble shooting system.Prepare to Trouble Shoot Control Lever Lock System
__________________________________________________
 A.  Check that landing gear control lever is in OFF position.
 B.  Check that landing gear ground lock assemblies are installed (Ref 32-00-01).
 C.  Depressurize hydraulic system A and system B.
 D.  Provide electric power to airplane. Close LEVER LATCH & PRESS WARNING LIGHTS circuit breaker on panel P6.
 E. Disconnect sensor linkage at ground spoiler shutoff valve.Trouble Shoot Control Lever Lock System
_______________________________________
 A.  Trouble shooting the control lever lock system entails performing an operation check of the control lever into UP position, with the safety switch sensor set to simulate shock strut extended. Then check for lock solenoid release by setting sensor to simulate shock strut compressed. Release of the lock solenoid prevents control lever from moving into UP position. Cause of malfunction may be determined by performing a continuity check of the system. Refer to Wiring Diagram Manual for circuit.
 B.  If electrical circuit and components check out OK, examine for mechanical malfunction due to loose bolts, jammed or binding linkage, or solenoid.
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737-300/400/500MAINTENANCE MANUAL
 C.  If the mechanical components check out OK, perform the Main Landing Gear Safety Sensors Adjustment/Test (AMM 32-09-01/501).
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737-300/400/500MAINTENANCE MANUAL
 LANDING GEAR CONTROL LEVER LOCK SOLENOID - REMOVAL/INSTALLATION
_______________________________________________________________
 1.  General
 A.  This procedure tells you how to remove and install the lock solenoid of the control lever for the landing gear.
 TASK 32-31-31-024-001
 2.  Lock Solenoid Removal (Fig. 401)_____________________
 A.  References
 (1)  
32-00-01/201, Ground Lock Assemblies

 B.  
Access

 (1)  
Location Zone
 101,102 Control Cabin

 C.  
Removal

 S 494-002
 (1)  
Make sure you install the ground locks in all the landing gear (Ref 32-00-01/201).

 S 864-003

 (2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P6 Main Power Distribution Panel
 1) LEVER LATCH & PRESS WARN

 

 S 864-004
 (3)  
Release the pressure from the hydraulic system.

 (4)  
Release and lower the P2 and P3 panels.

 (5)  
Remove the screws for the baseplate assembly.

 (6)
Disconnect the electrical connector from the baseplate assembly.

 (7)  
Remove the baseplate assembly.

 S 014-005
 S 034-007
 S 034-009
 S 034-028
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