(b)  
Replace the damaged seal segments.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
 1.

2.

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4.

A
737-300/400/500MAINTENANCE MANUAL
 MAIN GEAR SHOCK STRUT DOORS - DESCRIPTION AND OPERATION
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General
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 A.  The main gear shock strut doors close over the opening in the wing for the shock strut and drag strut when the gear is retracted (Fig. 1). The installation consists of three doors. A center door is attached to the shock strut and the drag strut, an outer door is hinged to the wing, and an inner door is hinged to the inboard edge of the center door. Linkage from the trunnion link and the universal side strut attachment operate during extension and retraction to open and close the doors. Shock strut doors remain open when the gear is extended. A support rod attached to the lowest shock strut clamp prevents center and inner doors from moving out of adjustment under vibration or heavy air loads.
Center Door
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 A.  The center door is a built up structure of graphite-reinforced kevlar and nomex honeycomb core. Reinforced points support attachment fittings and the lower edge carries a hinge half for the inner door. The door is secured by clamps to the shock strut and the drag strut. Adjustable fittings between the door and clamps are provided to fair the door with the lower surface of the wing. A bulb type seal is mounted along the outboard edge of the door. A rub strip on the aft edge and an angle riveted on the forward edge contact seals along the respective edges of the opening in the wing when the door is closed.
Outer Door
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 A.  The outer door is constructed of graphite-reinforced kevlar and a nomex honeycomb core. Two hinge fittings are bolted between webs on the inner side. The door hinges pivot on the heads of two eyebolts, used to connect the ends of a stabilizing beam, located between the landing gear beam and the rear wing spar. A bulb section rubber seal around the door opening in the wing provides an air-tight joint when the door is closed. A pushrod connects the door to a bracket on the underside of the trunnion link. Trunnion link rotation during extension and retraction operates the door.
Inner Door
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 A.  The inner door is a built up structure of graphite-reinforced kevlar and nomex honeycomb core. The door is hinged on the outer edge to the center door. The door is contoured to fair with the body when closed. A light fairing is attached to the outer skin to line up with the flap track fairing. A pushrod connects the door to the universal side strut attachment.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
PUSHROD TO TRUNNION LINK  EYEBOLT 
STABILIZING BEAM 
STOP  OUTER DOOR 
TRUNNION LINK  OUTER DOOR PUSHROD  OUTER DOOR 

OUTER DOOR 
DRAG STRUT SIDE STRUT SHOCK STRUT  CENTER DOOR FLAP TRACK FAIRING INNER DOOR ADJUSTABLE DOOR CLAMPS (TYP) UNIVERSAL SIDE STRUT ATTACHMENT 
INNER DOOR PUSHROD 
Main Gear Shock Strut Doors Figure 1 

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 ALL  ú ú 01 Page 2 ú Feb 25/86
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 MAIN GEAR SHOCK STRUT DOORS - REMOVAL/INSTALLATION
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 1.  General_______
 A.  The shock strut doors have a center door and an inner door connected by hinges.
 B.  You can remove and install the shock strut doors as an assembly. You can also remove and install the inner door separately. Before you remove the center door, it is necessary to remove the inner door.
　
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