S 865-102

 (2)
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 TASK 34-22-00-715-116
 4.  EFI Transfer Switch Test________________________
 NOTE: This is a scheduled maintenance task.
____
 A. References
 (1) 24-22-00/201, Manual Control
 B. Access
 (1)  Location Zones
 211/212 Flight Compartment

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 34-22-00

 ú ú 06A Page 526 ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 C. Procedure
 S 865-117
 (1)  Make sure this circuit breaker is closed:
 (a)  P18 Circuit Breaker Panel
 1) INSTR XFR

 S 865-118
 (2)  
Make sure the EFI and IRS transfer switches on the pilot's overhead panel, P5, are in the NORMAL position.

 S 865-121

 (3)  
Set the two mode switches on the IRS mode select unit (MSU) to the ATT position.

 S 865-122

 (4)  
Use the Inertial System Display Unit (ISDU) to put a heading into the IRUs.

 S 755-123

 (5)  
Make sure the ALIGN lights go off.

 S 865-124

 (6)  
Set the DH REF control on the left EFIS control panel to a different value than the DH REF control on the right EFIS control panel.

 S 865-125

 (7)  
Set the mode switch on the left EFIS control panel to the PLAN position.

 S 865-126

 (8)  
Set the mode switch on the right EFIS control panel to the MAP position.

 (a)  
Make sure the left EHSI shows the PLAN display and the right EHSI shows the MAP display.

 (b)  
Make sure the left and right EADIs show the DH value from the applicable EFIS control panel.

 S 865-127
 (9)  Set the EFI transfer switch to the BOTH ON 1 position.
 (a)  
Make sure the two EHSIs show the PLAN display.

 (b)  
Make sure the two EADIs show the DH value from the left EFIS control panel.

 S 865-128
 (10) Set the EFI transfer switch to the BOTH ON 2 position.
 (a)  
Make sure the two EHSIs show the MAP display.

 (b)  
Make sure the two EADIs show the DH value from the right EFIS control panel.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 865-129
 (11) Set the EFI transfer switch back to the NORMAL position.
 D. Put the Airplane Back to Its Usual Condition
 S 865-133
 (1) Remove electrical power if it is not necessary (Ref 24-22-00/201).
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A
737-300/400/500MAINTENANCE MANUAL
 ELECTRONIC FLIGHT INSTRUMENT SYSTEM (EFIS)
__________________________________________ CONTROL PANEL - REMOVAL/INSTALLATION
____________________________________
 1.  General_______
 A.  This procedure contains two tasks. The first task is for the removal of the EFIS control panel from the pilots' aft electronics panel, P8. The second task is for the installation of the EFIS control panel into the pilots' aft electronics panel.
 B.  Four quick-release fasteners hold each EFIS control panel in position. One electrical connector attaches an electrical cable to the rear panel of the EFIS control panel.
　
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