EXAMPLE LIGHT SEAL THAT IS BONDED
Light Seal Installation
Figure 401
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737-300/400/500MAINTENANCE MANUAL
C. Procedure
S 424-006-B00
(1)
Install a seal with a retainer.
(a)
Put the seal on the structure.
(b)
Install the screws through the retainer.
S 424-007-B00
(2)
Install a seal with the adhesive.
(a)
Use the solvent to clean the surface of the hinge.
(b)
Put a layer of the adhesive on the hinge.
(c)
Put a layer of the adhesive on the seal.
(d)
Carefully, put the seal on the hinge.
(e)
Let the adhesive become dry for 20 to 30 minutes.
(f)
Make holes in the seal that align with the holes in the hinge.
(g)
Install the hinge on the door.
(h)
Install the door.
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737-300/400/500MAINTENANCE MANUAL
FORWARD ENTRY DOOR - DESCRIPTION AND OPERATION
______________________________________________
1. General_______
A. The forward entry door is an inward-outward opening plug-type door at the forward end of the fuselage on the left side (Fig. 1). An upper and a lower hinge assembly support the door on the forward edge in the door opening. The door may be closed or opened from inside or outside the airplane.
B. The door is opened by manually operating the centrally located handle. An internal mechanism within the door releases roller latches on the door from latch fittings on the door jambs, folds the gates inward, and moves the door to the most inward position. The door is then manually swung through the door opening and stowed in the open position by engaging a latch pin in a hole in the upper hinge assembly.
C. The door is guided during the final closing operation by a centering guide attached to the center of the aft edge of the door engaging with a centering track located on the aft frame of the door opening.
D. When the door is in the closed position and the passenger cabin is pressurized, door stops mounted on the forward and aft frames of the door opening are contacted by adjustable door stop pins attached to the forward and aft edges of the door. The door stops transmit the pressurization loads on the door to the fuselage structure surrounding the door and prevent excessive deflection of the seal attached around the entire edge of the door.
E. A flap is located at both the upper and lower hinges between cutouts in the door reveal and is attached by a hinge to the forward frame of the door opening. The flap provides a continuous contact surface for the seal around the hinge cutouts when the door is in the closed position. Water drains are provided at the upper and lower hinge locations and along the lower edge of the lower gate. A door warning system proximity switch is attached to the door and door frame (Ref 52-71-00). Assist handles are provided to give additional control during the door operating cycle.
2. Handle Mechanism________________
A. The inside handle (Fig. 1) is bolted to a cam plate which is 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 which is splined to receive the outer end of the handle shaft. A seal to prevent pressurization losses is located inside the handle shaft. 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 which is clamped between the outside handle and the handle sleeve. A centering cam on the handle sleeve engages on a cam on the sleeve housing which is attached to the handle mechanism housing.
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