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P19 EXTERNAL POWER PANEL

Manual Control Component Location
Figure 201 (Sheet 1)

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A 737-300/400/500MAINTENANCE MANUAL

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LIGHT PLATE WILL SHOW "DRIVE" ON SOME AIRPLANES
Manual Control Component Location Figure 201 (Sheet 2)
E36053
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A
737-300/400/500MAINTENANCE MANUAL
 (2)  Access Panel
 1101 External Power Receptacle Door

 D. Procedure
 S 012-076
 WARNING: MAKE SURE THE EXTERNAL POWER SUPPLY OPERATES CORRECTLY BEFORE
_______ YOU SUPPLY EXTERNAL POWER TO THE AIRPLANE. IF THE EXTERNAL POWER SUPPLY HAS AN EARTH GROUNDED NEUTRAL, THERE MUST NOT BE AN OPEN OR FLOATING GROUND IN THE NEUTRAL CIRCUIT WIRING OF THE SUPPLY OR THE AIRPLANE. IF AN OPEN OR FLOATING GROUND IS PRESENT, THE AIRPLANE CAN BE PUT AT AN ELECTRICAL POTENTIAL ABOVE THE EARTH GROUND. THIS ELECTRICAL POTENTIAL CAN RESULT IN ELECTRIC SHOCK WITH POSSIBLE SEVERE INJURY TO PERSONNEL WHO CONTACT THE AIRPLANE. IF THE GROUND RETURN (NEUTRAL) CIRCUIT ON THE EXTERNAL POWER SUPPLY OR THE EXTERNAL POWER RECEPTACLE DOES NOT OPERATE CORRECTLY, REPAIR THE EXTERNAL POWER SUPPLY OR INSPECT THE EXTERNAL POWER RECEPTACLE NEUTRAL GROUND (AMM 24-41-11/601).
 WARNING: MAKE SURE THAT THE ELECTRICAL SYSTEM IS CLEAR OF OTHER PERSONS
_______ BEFORE YOU SUPPLY POWER TO THE AIRPLANE. HIGH VOLTAGES CAN CAUSE INJURIES.
 (1)  
Open the door for the external power receptacle.

 S 212-072

 (2)  
Examine the external power supply cord and the airplane external power supply receptacle before you connect the external power supply to the receptacle. If you find excessive arc erosion, corrosion and heat damage or discoloration to the pins or receptacles, repair the problems that you find (AMM 24-41-11/601).

 S 492-064
 WARNING: REMOVE ELECTRICAL POWER FROM THE POWER CABLE BEFORE YOU PUT THE
_______ POWER CABLE INTO THE EXTERNAL POWER RECEPTACLE. ELECTRICAL ARCS CAN CAUSE INJURIES.
 (3)  Install the power cable.
 (a)  
Put the connector of the power cable into the external power receptacle on the P19 panel.

 (b)  
Energize the power cable.

 (c)  
Make sure the EXTERNAL POWER CONN light on the P19 panel comes on.

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737-300/400/500MAINTENANCE MANUAL
 (d)  If the refuel panel door is closed, make sure the NOT IN USE light on the P19 panel comes on.
 NOTE: The NOT IN USE light will not come on if the refuel
____
 panel door is open.

 (e)  Make sure that the GRD POWER AVAILABLE light on the P5 panel come on.
 S 862-007
 (4)  
Make sure that the BUS TRANS switch on the P5 panel is in the AUTO position.

 S 862-008

 (5)  
Make sure that the STANDBY POWER switch on the P5 panel is in the AUTO position.

 S 862-009

 (6)  
Move the BAT switch on the P5 panel to the ON position.

 (a)  Make sure that these lights above the GEN 1 and GEN 2 switches on the P5 panel come on: 1) The TRANSFER BUS OFF light 2) The BUS OFF light 3) The GEN OFF BUS light
 S 862-010
 (7)  Supply power to the buses:
　
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