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 NOTE: During the subsequent steps you will release the
____ plunger of each switch individually. Continue to hold the plungers of the other two switches when the first switch plunger is released. This will do a test of the door latched, door closed and door warning circuits.
 19) Release the plunger of the Door Latched Switch.
 NOTE: This does a test of the door latched circuit.
____
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(g)

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747-400 MAINTENANCE MANUAL
 20) See that the applicable caution message shows on EICAS. a) DOOR FWD CARGO b) DOOR AFT CARGO
 21) Push and hold the plunger of the Door Latched Switch.
 22) See that the applicable caution message does not show on EICAS. a) DOOR FWD CARGO b) DOOR AFT CARGO
 23) Release the plunger of the Door Closed Switch.
 NOTE: This does a test of the door closed circuit.
____
 24) See that the applicable caution message shows on EICAS. a) DOOR FWD CARGO b) DOOR AFT CARGO
 25) Push and hold the plunger of the Door Closed Switch.
 26) See that the applicable caution message does not show on EICAS. a) DOOR FWD CARGO b) DOOR AFT CARGO
 27) Release the plunger of the Door Warning Switch.
 NOTE: This does a test of the door warning circuit.
____
 28) See that the applicable caution message shows on EICAS. a) DOOR FWD CARGO b) DOOR AFT CARGO
 29) Push and hold the plunger of the Door Warning Switch.
 30) See that the applicable caution message does not show on EICAS. a) DOOR FWD CARGO b) DOOR AFT CARGO
 31) Release the plungers of the Door Latched, the Door Closed
 and the Door Warning Switches.Close and latch but do not lock the cargo compartment door.Make sure the applicable caution message shows on EICAS: 1) DOOR FWD CARGO 2) DOOR AFT CARGO.Close the master latch lock handle.Make sure the appropriate caution message does not show on EICAS: 1) DOOR FWD CARGO 2) DOOR AFT CARGO.Do the above test for the other (forward or aft) cargo door.
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747-400 MAINTENANCE MANUAL
 TASK 52-71-00-715-014
 4. Operational Test of the Warning System for the Bulk Cargo Door
______________________________________________________________
 A. References
 (1)  
AMM 24-22-00/201, Manual Control

 B.
Access

 (1)  
Location Zone
 146 Bulk Compartment, RH

 (2)  
Location Zone
 146 Bulk Compartment, RH

 C.
Procedure

 S 715-006
 (1)
Do a test of the warning system for the bulk cargo door.

 (a)  
Open the bulk cargo compartment door.

 (b)  
Make sure the EICAS message DOOR BULK CARGO shows.

 (c)  
Close the bulk cargo compartment door.

 (d)  
Make sure the EICAS message DOOR BULK CARGO does not show.

 TASK 52-71-00-715-015
 5. Operational Test of the Warning System for the Side Cargo Door
______________________________________________________________
 A. References
 (1)  
AMM 24-22-00/201, Manual Control

 B.
Access

 (1)  
Location Zone
 261 Main Deck STA 1720 TO STA 2040, LH

 (2)  
Access Panel
 836L Door - Main Deck Cargo

 C.
Procedure

 S 715-077
 (1)
Do a test of the door warning system on the side cargo door.

 (a)  
Make sure the door is closed, latched and locked.

 (b)  
See that the green LATCHES CLOSED light on the door control panel is off.

 (c)  
Open the master latch lock handle.

 (d)  
See that the green LATCHES CLOSED light on the door control panel is on.
　
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