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There are two cargo compartment doors on the lower right side of the fuselage. Both are plug type, inward opening pressure doors, hinged at their upper edges and operated manually from either inside or outside the airplane. Except for slight difference in shape, both doors are similar in design and operation. The door is locked closed by four latches. Each door has a balance mechanism which creates door–open force slightly more than equal to the weight of the door. The door can therefore, with little effort, be swung open, until it engages a mechanical lock. The door can be closed easily by pulling a lanyard attached to the door, releasing the uplatch, grasping the handle and closing the door.
A pressure equalization valve is in the aft bulkhead of each compartment. The valves let only enough air flow into or out of the cargo compartments to keep the pressures nearly the same as the cabin pressure.
Blowout panels in the lower cargo compartments provide pressure relief at a greater rate than the pressure equalization valve in case the airplane pressurization is lost.
Emergency Escape
Emergency escape information included in this chapter includes:
.
emergency evacuation routes

.
flight deck windows

.
escape slides

Copyright . The Boeing Company. See title page for details.
December 5, 2003   1.40.29
Airplane General, Emergency Equipment, Doors, Windows -Systems Description 737 Operations Manual

.
escape straps

.
escape hatches

Emergency Evacuation Routes
Emergency evacuation may be accomplished through four entry/service doors and two overwing escape hatches. Flight deck crew members may evacuate the airplane through two sliding flight deck windows.
Emergency Evacuation Routes

Flight Deck Window Emergency Egress Flight Deck Escape Straps
An escape strap is attached to a compartment above each No. 2 window. The straps may be used by a crewmember for escape.
Flight Deck Number Two Windows
Flight deck sliding windows are opened by squeezing the lock release in the handle, rotating the handle inward, and sliding the window aft until it locks. The right hand window has provisions for exterior access as well.
Copyright . The Boeing Company. See title page for details.
1.40.30  December 5, 2003
Airplane General, Emergency Equipment, Doors, Windows -Systems Description
737 Operations Manual
If the flight deck number two windows must be used for emergency egress, use
the following procedure:
. open the window
. open the escape strap compartment (above and aft of window)
.
pull on the escape strap to ensure it is securely attached

.
throw the strap out the window

.
sit on the window sill with upper body outside

.
exit in accordance with the following illustration.

CAUTION: Ensure the escape strap is securely fastened to the airplane.
The above illustrated method of departure would probably be the easiest for most crewmembers. This technique is difficult and should be used only in extreme emergency.
Copyright . The Boeing Company. See title page for details.
December 5, 2003  1.40.31
Airplane General, Emergency Equipment, Doors, Windows -Systems Description 737 Operations Manual

Escape Slide Detachment Handle
The slide has not been certified to be part of the water landing emergency equipment. In a water environment, the slide may not properly inflate when deployed. If the deployed slide is recognized to be a potential obstruction to egress, a quick release handle is provided near the top of the slide. This handle is protected by a cover and is placarded. The escape slide is detached from the airplane by pulling the detachment handle. Once detached from the door sill, the slide is tethered to the door sill by a lanyard. A properly inflated slide could be buoyant, and useful as a flotation device for passengers in the water. Hand grips are positioned along the sides of the slide.
Escape Slide Detachment Handle

Overwing Escape Straps (as installed)
Escape straps are installed above each emergency escape hatch frame. The overwing escape hatches must be removed to expose the straps. One end of the strap is attached to the hatch frame. The remainder of the strap is stowed in a tube extending into the cabin ceiling. To use, the strap is pulled free from its stowage and attached to a ring on the top surface of the wing. The escape strap can be used as a hand hold in a ditching emergency for passengers to walk out on the wing and step into a life raft.
Copyright . The Boeing Company. See title page for details.
1.40.32  December 5, 2003
Airplane General, Emergency Equipment, Doors, Windows -Systems Description
737 Operations Manual
Overwing Escape Straps
　
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