500  Door Locations 
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3.  Emergency Exits
A.  There are two emergency exit hatches, one on each side of the fuselage, over the wing area. (Fig. 1) The two hatches are identical plug-type units and incorporate a cabin window. A hatch is removed by unlatching then pulling it inboard and up to clear the fuselage structure.
B.  A door-mounted evacuation slide is installed on each passenger/crew entry door and on each galley service door to facilitate emergency evacuation of passengers from the passenger cabin. For additional information on the evacuation slide installations, refer to Emergency Equipment, Chapter 25.
C.  The pilots' right sliding window can be operated from outside the airplane as an emergency exit. An external release handle permits the sliding window to be unlocked allowing the window to be open from outside the airplane. (Ref. to Sliding Control Cabin Windows, Chapter 56.)
D.  The control cabin door is provided with an emergency exit feature, which is described in Control Cabin Door, section 52-51-0.
4.  Cargo Doors
A.  There are two cargo compartment doors on the lower right side of the fuselage, one serving each cargo compartment. (Fig. 1) Both doors are hinged at their upper edges and open inward. Access panels are provided in the external skins of the cargo doors, to enable manual release of the cargo door latches if the operating mechanisms fail. Except for slight differences of size and shape, both doors are similar in design and operation.
5.  Service Doors
A.  Galley Service Doors
(1)  The galley service doors are on the right side of the airplane and are situated approximately opposite the entry doors. (Fig. 1) They are similar in design and operation to the forward passenger/crew entry door, though slightly smaller.
6.  Equipment Compartments Exterior Doors
A.  The equipment compartments exterior doors (Fig. 1) are the hinged doors which are large enough to permit the entry of personnel into the airplane or various compartments of the airplane. The doors which provide access to the equipment compartments from outside of the airplane include:
(1)  
Electronic Equipment Compartment External Access Door

(2)  
Air Conditioning Access Doors

(3)  
APU Access Door

(4)  
Lower Nose Compartment Access Door

500 
52-00 Page 4  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  May 15/70 

7.  Miscellaneous Exterior Service Doors
A. The miscellaneous exterior service doors (Fig. 1) are the small exterior doors which provide access for servicing the various systems on the airplane. These service doors include:
(1)  
Aft toilet service door

(2)  
CSD OIL reservoir sight gage access door

(3)  
Engine oil tank access door

(4)  
External power receptacle door

(5)  
Forward toilet service door

(6)  
Ground air conditioning access door

(7)  
Oxygen system charging panel door

(8)  
Pressure fueling station access door

(9)  
Section 48 access and blowout door

(10)
Tire burst protector screen doors (if installed)

(11)
Water service door

8.  Fixed Interior Doors
A.  Control Cabin Door
(1)  The control cabin door gives access from the passenger cabin to the control cabin (Fig. 1). It hinges aft from its left side.
B.  Lavatory Doors
(1)  The lavatories in the cabin are equipped with similar doors (Fig. 1). The doors hinge outward from the lavatory compartment, and are fitted with indicating locks which may be overridden from outside the compartment in the event of emergency.
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9.  Entrance Stairs
A.  Forward Airstair
(1)  
The forward airstair (figure 1) is located at the forward passenger/crew entry door and can be operated from inside or outside the airplane. When extended the airstair forms a stairway for passengers and crew to enter or leave the airplane. The forward entry door can be opened and closed without extending or retracting the forward airstair. The airstair can be extended by normal or standby power.

(2)  
When the airstair is retracted it folds, and telescopes, and is stowed in a compartment immediately below the forward entry door. The compartment is closed by the airstair door which fairs with the fuselage contour. The airstair door is included in the door warning system. For additional information on the forward airstair refer to, Forward Airstair and Door - Description and Operation, Section 52-61-0.
　
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