(4)
Install the 3802 tail cone access door (Ref 12-31-41/201).

 S 414-011
 S 414-012
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 22-11-40
 ALL  ú ú 01 Page 404 ú Mar 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 HYDRAULIC PRSSURE SWITCH - ADJUSTMENT/TEST
__________________________________________
 1.  General_______
 A.  This procedure contains two tasks. The first task is the Manual Test. The second task is a DFCS BITE test. The Manual Test and the DFCS BITE test use no external equipment. These tests make sure that the hydraulic pressure switch operates correctly.
 B.  You can use the Manual Test or the DFCS BITE test to do a check on the hydraulic pressure switch. But the DFCS BITE test is only for airplanes with the flight control computers -912 MOD B and on.
 C.  The hydraulic pressure switches are installed on the A/P actuators for the aileron and elevator controls.
 TASK 22-11-40-715-018
 2.  Hydrualic Pressure Switch Test - Manual Test_____________________________________________
 A.  References
 (1)
24-22-00/201, Manual Control

 (2)
29-15-00/201, Hydraulic Systems A, B and Standby

 B.  Access
 (1)  Location Zone
 101 Control Cabin - Left
 102 Control Cabin - Right

 C.  Procedure
 S 865-002
 (1) Supply electrical power (Ref 24-22-00/201).
 S 865-003
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL
_______ CONTROL SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDER, ELEVATORS, FLAPS, SLATS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (2)
Supply hydraulic power (Ref 29-15-00/201).

 (3)
Engage the autopilot channel A (or B as applicable) in the CMD mode.

 (4)
Make sure that the autopilot stays engaged.

 (5)
Open the AIR/GND RELAY circuit breaker on the P6 Panel.

 S 865-004
 S 715-005
 S 865-006
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 22-11-40
 ALL  ú ú 01 Page 501 ú Mar 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 715-007
 (6)  
Make sure that the autopilot stays engaged.

 S 865-009

 (7)  
Disengage the autopilot.

 S 865-008

 (8)
Close the AIR/GND RELAY circuit breaker on the P6 Panel.

 S 865-010

 (9)  
Remove electrical power if it is not necessary (Ref 24-22-00/201).

 S 865-011

 (10)
 Remove hydraulic power if it is not necessary (Ref 29-15-00/201).

 TASK 22-11-40-715-019
 3.  Hydraulic Pressure Switch Test - DFCS BITE (FCC -912 MOD B and on)__________________________________________________________________
 A. References
 (1)  
22-11-00/501, Digital Flight Control System

 (2)  
22-11-01/501, Digital Flight Control System

 B. Access
 (1)  Location Zone
 101 Control Cabin - Left 102 Control Cabin - Right
 C. Procedure
 S 745-013
 (1)  
Do the preparation for the DFCS BITE Test in this task: "Operational Test - Digital Flight Control System" (Ref 22-11-01/501).

 S 745-015

 (2)  
Get access to the OVERNIGHT MAINT 2/2 page:

 (a)  
Push the INIT/REF key on the FMCS CDU.

 (b)  
Push the LSK adjacent to <INDEX.

 (c)  
Push the LSK adjacent to <MAINT.

 (d)  
Push the LSK adjacent to <DFCS.

 (e)  
Push the NEXT PAGE key.

 (f)  
Make sure that the OVERNIGHT MAINT 2/2 page shows on the CDU.

 S 745-016
 (3)  Get access to TEST SELECTION:
　
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