NOTE:MECHANISM SHOWN IN CLOSED AND LATCHED
HANDLE MECHANISM
POSITION.
B

PATH OF ROLLER ACTUATING LATCHING CRANK
PATH OF ROLLER
ACTUATING DOOR
COCKING CRANK

CAM PLATE PIVOT CENTER
CAM PLATE
C
Aft Entry Door Mechanism
Figure 1 (Sheet 2)

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A
737-300/400/500MAINTENANCE MANUAL
DOORPIN
RELEASE HINGE LINK
LEVER
HINGE ARM 
GUIDE ARM 
ROLLER 
TORQUE TUBE  GUIDE PLATES 
FWD 
ATTACH FITTING  ROD END 
BEARING 
INBD 
HINGE SUPPORT 
UPPER HINGE 
D
TORQUE TUBE 
SNUBBER 
TORQUE TUBE  ATTACHMENT 
BOLT 
RADIUS LINK 
HINGE LINK 
BOLT 
HINGE ARM 
BOLT  STOP PLATE 
FWD 
SNUBBER 
INBD 
ATTACH FITTING  TORQUE TUBE 
HINGE SUPPORT 
LOWER HINGE 
E 
Aft Entry Door Mechanism 
Figure 1 (Sheet 3) 

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500MAINTENANCE MANUAL
STOP ASSEMBLY
SEE G
DOOR STOP FITTING
ADJUSTABLE DOOR STOP PIN
DOOR FRAME
SUPPORT FITTING SERRATED PLATES
ROLLER CAM LATCH ROD FITTING
LATCH ROLLER
DOOR ROLLER CAM CRANK
FWD
DOOR
NOTE: LATCH AND STOP ASSEMBLY SHOWN IN CLOSED AND LATCHED POSITION.
LATCH AND STOP ASSEMBLY
F
LOCK SPRING  FITTING DOOR STOP 
DOOR STOP PIN ADJUSTABLE 
STOP ASSEMBLY Aft Entry Door Mechanism Figure 1 (Sheet 4) G 

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A 737-300/400/500MAINTENANCE MANUAL
 2.  Handle Mechanism
________________
 A.  The inside handle (Fig. 1) is bolted to a cam plate splined to receive the outside handle shaft. The outside handle in a recess panel flush with the door exterior skin is attached to a handle sleeve splined to receive the outer end of the handle shaft. A seal to prevent pressurization losses is located inside the handle sleeve housing. Another seal is positioned between the sleeve housing and the seal plate. An outside handle seating spring is retained within the handle shaft by a nut and spring retainer. A pin located inside the spring is attached to a pin retaining washer located between the outside handle and the handle sleeve. A centering cam on the handle sleeve engages on a cam on the sleeve housing attached to the handle mechanism housing.
 3.  Latching Crank and Door Locking Crank
_____________________________________
 A.  Two cam rollers attached to two roller cranks (Fig. 1) bear against a cam plate. Viewing the door from inside the airplane, the left cam roller crank is splined to a latching crank. The complete crank assembly rotates in ball bearings secured in the handle mechanism housing by bearing retainers. Two separate control rods connected to each end of the latching crank connect with latch rods at the top and bottom of the door. The right cam roller crank is splined to the door cocking crank connected to the torque tube. The torque tube is supported on two ball bearings mounted in the handle mechanism housing. Two nuts allow vertical adjustment of the door in the door opening. Twelve bolts secure the handle mechanism housing to the door structure.
 4.  Latch Assembly
______________
 A.  Latch rollers (Fig. 1) at the ends of the latch rods engage with latches mounted on the door jambs. The upper and lower latch rods have control rods connected to the upper and lower gates respectively. The gates are mounted at the top and bottom of the door with piano-type hinges with diaphragm seals to prevent pressurization leaks.
　
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