*
The roller arm to will pull down on the interlock rod
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The vent door will open
*
The roller will move past the hook.
If differential pressurization is above 0.21 psi, and you continue to pull up on the door handle with sufficient force:
*
The cam will force the roller to move outboard along the flat cam surface
*
The roller arm to will pull down on the interlock rod sufficient to open the vent door 30 degrees
*
The roller cannot move past the hook.
When the differential pressurization goes below 0.21 psi, upward force on the handle will move the vent door full open.
An example of sufficient force to open the vent door 30 degrees is approximately 200 pounds when differential pressurization is
1.0 psi.
Vent Door Mechanism Failure
If either rod fails or disconnects, the inboard end of the roller arm moves down. The rotation of the roller arm moves the roller away from the interlock cam so the interlock cam can turn. The cam can push the roller arm up to let you open the door. If you try to latch the door, the arm catches the cam. The cam cannot push the arm up to go back to the door close position.
Training Information Point
Do a check of the vent door mechanism if you cannot move either door handle to the close position when you try to close the door.
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D633W101-BEJ May 05/2003
PASSENGER ENTRY DOOR SYSTEM -VENT DOOR MECHANISM -INTERLOCK FUNCTION
EFFECTIVITY BEJ ALL 52-11-00
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D633W101-BEJ May 05/2003
PASSENGER ENTRY DOOR SYSTEM -FLIGHT LOCK MECHANISM AND FLIGHT LOCK SENSORS
Purpose
The flight lock mechanism locks the latch mechanism closed when the airplane airspeed is 80 knots or more.
Physical Description
The flight lock mechanism has these components:
*
Motor
*
Flight lock disengaged sensor
*
Flight lock engaged sensor
*
Target
*
Lock pawl lever
*
Cam
*
Spring (2)
Functional Description -Flight Lock Mechanism
The air data inertial reference unit (ADIRU) and the secondary attitude and air data reference unit (SAARU) supply an airspeed signal when the airplane reaches 80 knots.
The PSEU and an ELMS electronics unit energize relays that send power to the flight lock motor. The motor moves the lock pawl lever to the locked position. The motor stalls and holds the lever in the locked position. The lever engages the cam on the latch torque tube. The latch torque tube cannot turn to unlatch the door.
When the airplane goes below 80 knots, the relays open to remove power from the motor. The springs move the lever to the unlocked position. The latch torque tube can turn to unlatch the door.
Functional Description -Flight Lock Sensors
Flight lock engaged and the flight lock disengaged sensor information goes from the proximity sensor electronics units (PSEU) to the airplane information management system (AIMS). Status and maintenance messages show when the lock pawl lever is not in its commanded position.
EFFECTIVITY BEJ ALL 52-11-00
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D633W101-BEJ May 05/2003
PASSENGER ENTRY DOOR SYSTEM -FLIGHT LOCK MECHANISM AND FLIGHT LOCK SENSORS
EFFECTIVITY BEJ ALL 52-11-00
Page 39
D633W101-BEJ May 05/2003
PASSENGER ENTRY DOOR SYSTEM -MODE SELECT MECHANISM AND MECHANICAL SWITCHES
Purpose
The mode select mechanism lets you set the operation mode for the emergency power assist system (EPAS), and the girt bar mechanism.
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本文链接地址：777 AMM 飞机维护手册 Doors 舱门(11)
