The door warning system gives indications of the condition of all the doors found in pressurized areas of the aircraft. It also gives indications of some of the doors found in areas that are not pressurized.

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There are three proximity sensors on the passenger door, one at the forward and aft ”G“ locks and one at the outer door handle. The proximity sensors cause the amber caution PASSENGER DOOR indication to show on the EICAS primary page when the door is open. Also, they cause the passenger door to show open on the STATUS display synoptic page.

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The cabin door annunciation system has micro switch sensors for the forward-cabin and mid-cabin doors. The micro switch is an electrical mechanism installed in the forward-cabin and mid-cabin bulkheads.

Cabin Pocket Doors Operation

All cabin sliding pocket doors must be latched open (stowed) for taxi, takeoff and landing. To close (unstow) a cabin pocket door, the associated cabin DOOR RELEASE switch located on either side of the bulkhead must be used.

Note that the cabin door cannot be closed (unstowed) when the Fasten Seat Belts & Return to Seat passenger signs is turned on. The DOOR RELEASE buttons are disabled by the Fasten Seat Belts & Return to Seat passenger signs when illuminated. This feature does not affect opening (stowing) of the doors.

Cabin Pocket Doors Monitoring

The cabin pocket door annunciation system is interfaced with the EICAS to provide an annunciation to the crew if either of the cabin doors is closed (unstowed) during taxi prior to takeoff or on approach prior to landing.

The EICAS caution message, INT CABIN DOOR, will be displayed if the following conditions are true:

On the ground:

1. SEAT BLTS cockpit switch is selected OFF (regardless of cabin door position).
2. Either cabin pocket door is not latched in the full open (stowed) position with the SEAT BLTS cockpit switch at ON.

In the air:

1. Either of the cabin pocket door is not latched in the full open (stowed) position with the airplane not in a “clean” configuration (i.e. Approach with Landing gear select UP and slats/flaps extended) or SEAT BLTS cockpit switch at ON.
2. Landing gear select down with SEAT BLTS cockpit switch is at OFF.

Note:
Landing Gear handle position (DOWN) drives CAS message for pilot awareness if the SEAT BLTS switch is set to OFF

Each cabin pocket door is electrically locked by an electrical latch actuator, 28 VDC powered by the Cabin Management System (CMS).

When pressing cabin DOOR RELEASE switch, each associated Relay Drive Equipment (RDE) provides a ground signal to the cabin pocket door electric latch actuator.

With the Fasten Seat Belts & Return to Seat passenger signs illuminated, control relays remove 28 VDC from door switches and prevent cabin door deployment.

The EICAS caution message, INT CABIN DOOR, will be posted when at least one of the following conditions are met:

1. The landing gear lever is DOWN and the Fasten Seat/Belt (FSB) switch is OFF.
2. At least one cabin pocket door is closed/unstowed and

   1. The Fasten Seat/Belt (FSB) switch is ON, or
   2. The landing gear lever is up, nose landing gear proximity switch simulated to not DN LOCK and Slats or Flaps surfaces are not at zero.

If the EICAS message, INT CABIN DOOR, is present in another configuration, further trouble shooting is required regarding the micro switch functionality (adjustment/associated wiring).

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There are two proximity sensors for the baggage door, One proximity sensor is installed at the baggage door frame and indicates that the door is closed. The other proximity sensor is installed at the handle in the middle of the baggage door. This proximity sensor indicates that the handle is locked. The proximity sensors cause the amber caution CARGO DOOR indication to show on the EICAS primary page when the door is open. Also, they cause the baggage door to show open on the STATUS display synoptic page.

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There is one proximity sensor at the aft equipment compartment door frame. The proximity sensor causes the amber caution LARGE SERV DOORS indication to show on the EICAS primary page when the door is open. Also, this causes the aft equipment compartment door to show open on the STATUS display synoptic page. 

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There is one proximity sensor at the refuel/defuel door. The proximity sensor causes the amber caution LARGE SERV DOORS indication to show on the EICAS primary page when the door is open. 

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There is one proximity sensor at the over-wing emergency exit. When the over-wing emergency exit is opened, the proximity sensor causes the amber caution R EMER EXIT indication to show on the EICAS primary page. Also, the sensor causes the over-wing emergency exit to show open on the STATUS display synoptic page. 

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There is one proximity sensor at the No. 3 hydraulic system servicing door. The proximity sensor causes the amber caution LARGE SERV DOORS indication to show on the EICAS primary page when the door is open.

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The door warning system uses proximity sensors to give caution messages on the engine indication and crew alerting system (EICAS) in the flight compartment. The door warning system uses part of the landing gear electronic control unit (LGECU). The warning system is on the doors that follow:

• Passenger door
• Baggage door
• Aft equipment compartment door
• Refuel/defuel door
• Overwing emergency exit
• Hydraulic system no. 3 servicing door

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Component Location Index
IDENT	DESCRIPTION	LOCATION	IPC REF
MT42/MT43/MT44	PASSENGER DOOR PROXIMITY-SENSOR	ZONE(S) 832	52-70-01 [ GX ] [ GXRS ] [ G5000 ]
MT45/MT46	BAGGAGE DOOR PROXIMITY-SENSOR	ZONE(S) 834	52-70-03 [ GX ] [ GXRS ] [ G5000 ] 52-70-05 [ GX ] [ GXRS ] [ G5000 ]
MT47	AFT-EQUIPMENT-COMPARTMENTDOOR PROXIMITY-SENSOR	ZONE(S) 311	52-70-09 [ GX ] [ GXRS ] [ G5000 ]
MT211	REFUEL/DEFUELDOOR PROXIMITY-SENSOR	ZONE(S) 142	52-70-13 [ GX ] [ GXRS ] [ G5000 ]
MT48	OVER-WING EMERGENCY-EXIT PROXIMITY-SENSOR	ZONE(S) 841	52-70-17 [ GX ] [ GXRS ] [ G5000 ]
MT212	NO.3 HYDRAULIC-SYSTEMSERVICING-DOOR PROXIMITY-SENSOR	ZONE(S) 171	52-70-21 [ GX ] [ GXRS ] [ G5000 ]

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