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FIXED INTERIOR DOORS -FLIGHT COMPARTMENT DOOR -PRESSURE SENSOR
Pressure Sensor
A pressure sensor is mounted on the ceiling forward of the flight compartment door.
The pressure sensor contains an internal dual channel solid state pressure sensor.
Either redundant channel in the pressure sensor will open a switch that removes the ground path to the electric strike and allows the door to open.
The pressure sensor is a normally closed switch that will open when a rapid decompression event in the flight compartment occurs.
When a rapid decompression event occurs, the pressure switch senses the change and causes the power to the solenoid to be removed which will release the door latch, allowing the door to open inward.
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Fixed Interior Doors -Flight Compartment Door -Pressure Sensor
EFFECTIVITY BEJ ALL POST SB 777-25-0216 52-50-00
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FIXED INTERIOR DOORS -FLIGHT COMPARTMENT DOOR -SWITCH MODULE
Three Position Rotary Switch
The three position rotary switch is located on the M52002 Flight Deck Door Module which is on the overhead P8 Aisle Stand panel.
The switch has three positions: UNLKD, AUTO, and DENY.
The UNLKD position is a push-to-rotate, momentary switch position that unlocks the door.
The door will only be unlocked while the switch is held in the UNLKD position.
The UNLKD position resets the DENY function.
The AUTO position locks the door and enables the door to be unlocked after a correct code is entered in the keypad after a programed time delay.
The DENY position is a momentary switch position that rejects a correct door entry request and prevents further keypad entry for a programmed time period (Deny Time Delay).
Flight Compartment Door Indicator Lights
The Flight Compartment Indicator lights are located on the M52002 Flight Deck Door Module which is on the overhead P8 Aisle Stand panel.
The lights consist of AUTO UNLK and LOCK FAIL
The AUTO UNLK light indicats that a correct keypad code has been entered and that the door will unlock automatically after a programmed period of time unless the crew takes action.
The LOCK FAIL light indicates that the three position switch is in the AUTO position and the solenoid is not in the locked position.
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Fixed Interior Doors -Flight Compartment Door -Switch Module
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FIXED INTERIOR DOORS -FLIGHT COMPARTMENT DOOR -OPERATION
Operation
When personel wish to enter the flight compartment they must first enter the correct code in the keypad.
If the correct code is entered, the system will immediately indicate correct code entry with an amber LED on the numeric keypad.
The chime module will sound and the AUTO UNLK light in the flight compartment will come on to notify the flight crew of a requested entry.
If the flight crew takes no action, the door entry system will unlock the door after the Access Time Delay expires.
Before the Access Time Delay expires, the flight crew has the option of manually unlocking the door overriding the automatic unlock by placing the three position rotary switch in the UNLKD position.
The flight crew can also choose to deny access and any further keypad entry request by selecting DENY on the three position switch.
Selecting DENY will prevent unlocking of the door and further keypad entry for the duration of the Deny Time Delay.
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