(b)  
Load the baggage into module 2. Operate (extend) the modules to position 3.

 (c)  
Load the baggage into module 1. Operate (extend) the modules to position 4. Position 4 is the fully extended position.

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CARGO LOADER RETRACT LIMIT SWITCH
Cargo Loader Schematic Figure 2
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AND OPERATE TO
POSITION NO. 2

FWD

Forward Cargo Compartment, Cargo Loading Sequence
Figure 3 (Sheet 1)

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POSITION NO. 3
-LOAD MODULE 1 AND
OPERATE TO POSITION NO. 4 FWD
POSITION NO. 4
-ALL MODULES LOADED
-LOAD THE FLOOR AREA AND THE DOORWAY
FWD
Forward Cargo Compartment, Cargo Loading Sequence
Figure 3 (Sheet 2)

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(2)

(3)

(4)

(5)

(6)

(7)

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 (d)  Load the baggage onto the floor in front of the panels, and in
 the doorway.The modules must be in the fully extended during flight.If the modules are not fully extended, and an electrical failure occurs, you must deactivate the cargo loader system. You must also move the modules to the fully extended position and lock then in position manually.
 NOTE: Refer to AMM 25-51-00, Cargo Loader Systems - Maintenance
____ Practices for the deactivation procedure.
The plungers and hook plates on the modules cause the modules to operate in the sequence that follows:
 (a)  
The jackscrew is connected to module 3 with a ball nut. As module 3 moves from position 1, ramps on the modules move the plungers. This unlocks the modules and lets the modules extend and retract.

 (b)  
As module 3 moves to position 2, the hook plates between modules 3 and 2 engage.

 (c)  
Then, when module 3 moves from position 2, it pulls module 2 to position 2. The hooks and plates between modules 2 and 1 engage.

 (d)  
As module 3 moves from position 3, it pulls module 2 from position 2, and module 1 from position 1.

 (e)  
As module 3 moves to position 4, it pulls module 2 to position

 3, and module 1 to position 2.For the forward cargo compartment, the electrical power for the drive motor comes from the 115V AC GND HNDLG BUS through the FWD CARGO LOADER DRIVE circuit breaker.For the aft cargo compartment, the electrical power for the drive motor comes from the 115V AC GND HNDLG BUS through the AFT CARGO LOADER DRIVE circuit breaker. The circuit breakers are on the APU/EXT PWR PANEL, P34.The drive motor is controlled by the cargo loader control circuit.

 (a)  
For the forward cargo compartment, power for the control circuit comes from the 28V DC GND HNDLG BUS throught the FWD CARGO LOADER CONT circuit breaker on the P34 panel.
　
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