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Cable crank
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Push/pull cable assembly
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Cam lever
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Spring.
The mode select switch is on the mode select mechanism.
Functional Description
When you move the mode select handle aft, you select the auto mode. Selection of the auto mode does these two things:
*
Closes the mode select switch which arms the emergency power assist system (EPAS)
*
Pushes down on the push/pull cable which arms the girt bar mechanism.
When you pull the external door handle outboard, the disarm crank pulls the cable that goes to the mode select lever. It moves the lever forward to the manual position.
When you move the external door handle inboard, the disarm crank pushes the cable. The cable slides through the mode select lever. It does not move the lever. The lever stays in the manual position.
When you move the mode select handle forward, it does not push on the cable. The cable slides through the handle. It does not move the external door handle.
The spring and cam lever are an overcenter device for the mode select handle. When you move the handle the spring and cam push the handle completely to the position you select.
The mode select switch is one of two mechanical switches used in the emergency power assist system (EPAS) operation.
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PASSENGER ENTRY DOOR SYSTEM -MODE SELECT MECHANISM AND MECHANICAL SWITCHES
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PASSENGER ENTRY DOOR SYSTEM -GIRT BAR MECHANISM AND GIRT BAR FLOOR FITTING -INTRODUCTION
Purpose
The girt bar mechanisms hold the emergency slide girt bar on the bottom of the door in the manual mode and releases it into the girt bar floor fittings in the automatic mode.
The floor fittings hold the girt bar on the floor when you open the door in the automatic mode.
Physical Description
There are girt bar mechanisms on the lower forward and aft corners of the door. A torque tube connects the end crank of the two mechanisms to the push/pull cable assembly.
Each girt bar mechanism has these components:
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End crank
*
Spring
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Interlock
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Hook
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Carrier fitting.
Each floor fitting assembly has a spring-loaded lock pawl. A yellow indication flag attaches to the lock pawl. The flag shows through a witness port on the sidewall. You see the witness port later in this section, in the door operation.
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PASSENGER ENTRY DOOR SYSTEM -GIRT BAR MECHANISM AND GIRT BAR FLOOR FITTING -INTRODUCTION
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PASSENGER ENTRY DOOR SYSTEM -GIRT BAR MECHANISM -FUNCTIONAL DESCRIPTION
Door Lifted, Escape Slide Not Armed
The girt bar mechanism holds the girt bar when the door is not latched and in the auto mode. The girt bar is held between the hook and the carrier fitting (not shown).
You cannot move the mode select lever when the door is open. The spring holds the interlock so the end crank cannot turn. The hook that holds the girt bar will not move to release the girt bar.
The indication flag is not lifted. You see the flag through the witness port in the sidewall.
Door Latched, Escape Slide Not Armed
When the door moves down to latch, these two things occur with the girt bar mechanism:
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The roller pushes down on the lock pawl and lifts the indication flag up out of the witness port
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