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 340. It is attached to frames, and intersecting posts to effect maximum rigidity.
 C.  Skin reinforcement around the control cabin windows is furnished by five formed titanium doublers. These doublers are formed to surround the windows and follow the outline and contour of the fuselage frames, stringers, and window structure truss. They are fay sealed to the inboard side of the skin.
 7.  Door Opening Reinforcements (Fig. 4)
___________________________
 A.  Where local design conditions require it, additional stringers and frames have been added.
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747-400 MAINTENANCE MANUAL
SEE A
NO. 2 POST
NO. 1 POST
A

Window Reinforcements
Figure 3

NO. 3 POST
TITANIUM DOUBLER
STA 340
STA 320
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C82266
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747-400
MAINTENANCE MANUAL

Door Reinforcement
Figure 4

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747-400 MAINTENANCE MANUAL
 MAIN ENTRY DOOR STOP PLATE - REMOVAL/INSTALLATION
_________________________________________________
 1.  General
_______
 A.  This procedure contains two tasks. The first task is the removal of the stop plate for the main entry door. The second task is the installation of the stop plate for the main entry door.
 B.  You must replace the stop plates for the main entry door when they are worn or defective (Ref 52-11-01/601 and 52-11-09/601).
 TASK 53-11-01-004-001
 2.  Remove the Stop Plate (Fig. 401)
_____________________
 A.  References
 (1)
IPC 52-11-07 Fig. 3 (No. 1 Door)

 (2)
IPC 52-11-11 Fig. 3 (No. 5 Door)

 B.  Access
 (1)  Location Zone 211 Passenger Cabin, Nose to First Door, No. 1 Door, LH 271 Passenger Cabin, Sta 2040 to Sta 2360, No. 5 Door, LH
 C.  Procedure
 S 324-012
 (1) Remove the rivets that attach the stop plate to the threshold.
 NOTE: The rivets used in production are 1/8-inch, MS20427,
____
 Monel rivets.

 S 024-011
 (2)
Remove the bolts that attach the stop plate to the threshold.

 (3)
Remove the stop plate.

 S 034-010
 TASK 53-11-01-404-003
 3.  Install the Stop Plate (Fig. 401)
______________________
 A.  Standard Tools and Equipment
 (1) Rivets - NAS1399M or NAS1399MW
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747-400
MAINTENANCE MANUAL

(2 DOOR LOCATIONS SHOWN) SEE

SEE

MAIN ENTRY DOOR STOP PLATE
(EXAMPLE)

Main Entry Door Stop Plate Installation
Figure 401

C82416
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