S 864-032

 (3)  
Make sure the STANDBY POWER switch on the pilots' forward overhead panel is in the AUTO position.

 S 864-033

 (4)  
Make sure the EFI transfer switch on the pilots' forward overhead panel is in the NORMAL position.

 S 864-011
 CAUTION: MAKE SURE THAT YOU OPERATE THE EQUIPMENT COOLING SYSTEM BEFORE
_______ YOU ENERGIZE AN ELECTRONIC SYSTEM. TOO MUCH HEAT CAN CAUSE DAMAGE TO ELECTRICAL EQUIPMENT.
 (5)  Supply the cool air from the equipment cooling system
 (AMM 21-58-02/501).

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A 737-300/400/500MAINTENANCE MANUAL
 S 864-012
 (6) Remove the DO-NOT-CLOSE tags and close these circuit breakers:
 (a)  
P6 Circuit Breaker Panel
 1) EFIS SYM GEN R

 (b)  
P18 Circuit Breaker Panel
 1) EFIS SYM GEN L
 2) INST TRANS

 S 864-034
 (7)  Make sure these circuit breakers are closed:
 (a)  
P6 Circuit Breaker Panel
 1) LANDING GEAR AIR/GND RELAY & LIGHTS
 2) F/O EHSI
 3) EFIS CONT PANEL R

 (b)  
P18 Circuit Breaker Panel
 1) CAPT EHSI
 2) EFIS CONT PANEL L

 E. EFIS Transfer Relay Test
 S 864-035
 (1)  
Set the mode switch on the captain's EFIS control panel to the MAP position.

 S 864-036

 (2)  
Set the mode switch on the first officer's EFIS control panel to the PLAN position.

 S 864-037

 (3)  
Set the EFI transfer switch on the pilots' forward overhead panel to the BOTH ON 1 position.

 (a)  Make sure the two EHSIs show the MAP mode.
 S 864-038
 (4)  Set the EFI transfer switch on the pilots' forward overhead panel to the BOTH ON 2 position.
 (a)  Make sure the two EHSIs show the PLAN mode.
 S 864-039
 (5)  Set the EFI transfer switch on the pilots' forward overhead panel to the NORMAL position.
 (a)  
Make sure the captain's EHSI shows the MAP mode.

 (b)  
Make sure the first officer's EHSI shows the PLAN mode.

 S 414-027
 (6)  Install the connector for the flight management computer on the vertical bracket behind the flight management computer.
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737-300/400/500MAINTENANCE MANUAL
 S 414-029
 (7)  Do this task: Flight Management Computer Installation
 (AMM 34-62-21/401).

 F. Put the Airplane Back to Its Usual Condition
 S 864-015
 (1)
Remove equipment cooling if it is not necessary (AMM 21-58-02/501).

 S 864-016

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

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737-300/400/500MAINTENANCE MANUAL
 MAGNETIC STANDBY COMPASS - DESCRIPTION AND OPERATION
____________________________________________________
 1.  General_______
 A.  The magnetic standby compass is installed forward of the forward overhead panel. The standby compass is a self-contained unit and indicates the magnetic heading of the airplane. It is used primarily in cases of emergency when all other compass systems fail. For a pictorial view of the magnetic standby compass, see figure 1.
 2.  Magnetic Standby Compass________________________
　
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