曝光台 注意防骗
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installed in the upper edge of the door as it is viewed in the closed position.
The handle can be lifted out of the recess and rotated forward to
latch the door, or aft to unlatch the lower cabin door. Gas struts are installed
on the forward lower door structure to aid in closing and
prevent damage if the door is inadvertently allowed to drop open.
Pilot’s Manual
1-6 PM-126A
CABIN ENTRY DOOR (CONT)
A cable and knob assembly is attached to the forward side of the lower
door frame.The cable and knob assembly is used to raise and lower the
lower door from inside the cabin. When closing the lower cabin door, a
secondary latch will automatically engage and hold the lower door in
position against the door seal until the lower door handle is rotated
forward to the locked position. If the handle is not rotated to latch the
door and the door is left in position by the secondary latch, the upper
door will be prevented from closing due to a pin which extends outboard
from the lower door just below the handle.
When the locking handle on the lower door is rotated forward, the
latching mechanism drives four pins into the fuselage frame, securing
the lower door. The inside and outside handles on the upper cabin door
are secured to a common shaft within the door. When either upper door
handle is rotated to the closed position, six latching pins are driven into
the fuselage structure and two pins are driven from the upper door into
overlapping halves in the lower door. There are a total of eight pins
installed in the upper door. Two of the six upper door latching pins are
driven through both the fuselage structure and through interlocking
arms on the lower door, which secure the doors together.
When the cabin entry door pins are engaged (there are twelve pins
total, eight in the upper door, four in the lower door), the door becomes
a rigid structural member. Correct pin engagement may be checked
using the small sight windows installed in the upper and lower inner
door panels. Sight windows are provided to check pin engagement for
ten of the latch pin locations, for two middle lock pins and for the lower
lock (pawl).
ENTRY DOOR ANNUNCIATIONS
All of the twelve cabin door latching pins are installed so they contact
a microswitch when the pin is fully engaged. If any of these pins do not
make contact when the upper door handle is closed, a red ENTRY
DOOR warning light is displayed on the Crew Warning Panel (CWP)
and a red ENTRY DOOR message on the Engine Indicating and Crew
Alerting System (EICAS) illuminates to provide the crew with visual
indication of cabin door security.
Pilot’s Manual
PM-126A 1-7
ENTRY DOOR ANNUNCIATIONS (Cont)
A white ENTRY DOOR PIN message will illuminate on the CAS
whenever the aircraft is on the ground and the cabin door pins are not
all fully engaged or all not fully disengaged. The ENTRY DOOR CWP
message will be simultaneously displayed with the ENTRY DOOR PIN
CAS message. If the keylock on the upper cabin entry (forward
emergency exit) door is locked and electrical power is applied to the
aircraft the red ENTRY DOOR light on the CWP will illuminate steady
to prevent operations with the emergency exit locked. The red ENTRY
DOOR and white ENTRY DOOR PIN CAS messages will also be
displayed on the EICAS when the aircraft is in this configuration.
If the DOOR circuit breaker on the pilot’s circuit breaker panel is out,
the red ENTRY DOOR CWP annunciator and the red ENTRY DOOR
and white ENTRY DOOR PIN CAS messages will all be displayed at
the same time.
Pilot’s Manual
1-8 PM-126A
CABIN DOOR OPERATION
To open the cabin door from the outside:
1. Insert the key in the key lock and rotate to unlock.
2. Lift the upper door handle out and rotate the handle clockwise
with both hands to the stop, releasing the door latch pins.
3. Raise the upper door by hand until the gas struts automatically
raise the door up and hold it fully open.
4. While holding the lower door, reach inside and rotate the lower
door locking handle aft (clockwise) to the OPEN position.
5. Lift the lower door secondary latch lever, located on the
forward side of the door frame, to release the lower door.
6. Gently lower the door to the open position, the flip-down step
will self deploy into the extended position.
OPENING CABIN DOOR (FROM OUTSIDE)
Figure 1-3
A52-1032
Pilot’s Manual
PM-126A 1-9
CABIN DOOR OPERATION (CONT)
To close cabin door from the inside:
The flip-down step could cause injury to the hand or
fingers if it is allowed to suddenly swing down into
the stowed position. The flip-down step must be
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