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53-12-11
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A
737-300/400/500MAINTENANCE MANUAL
STRUCTURE AROUND OPENINGS - DESCRIPTION AND OPERATION
_____________________________________________________
1. General_______
A. The fuselage structure around all door openings is reinforced to ensure adequate distribution of fuselage loads around the opening.
B. The passenger window openings are reinforced by doublers forming part of the inner waffled skin (Fig. 1).
C. The control cabin window frames are reinforced fabrications of extruded sections.
D. Around all entry, cargo and access door openings additional inner skins are applied, together with additional stringers and frames as local design conditions have demanded.
Fuselage Window Cutout
Figure 1
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53-13-00
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A
737-300/400/500MAINTENANCE MANUAL
LOWER DOORSILL SCUFF PLATE - REMOVAL/INSTALLATION
_________________________________________________
1. General
_______
A. This procedure contains two tasks:
(1)
The first task is the removal of the scuff plates.
(2)
The second task is the installation of the scuff plates.
B. All the installations of the scuff plates are almost the same.
C. The clearances between the scuff plates and the airplane structure are sealed for aerodynamic smoothness.
TASK 53-13-01-024-012-B00
2. Remove the Scuff Plates
_______________________
A. Equipment
(1) Sealing compound cutting tool - hardwood or plexiglass; commercially available
B. Consumable Materials
(1)
C00064 - Clear Alodine 1000
(2)
A00247 - Sealant - BMS 5-95 Class B
(3)
B00148 - Solvent - Methyl Ethyl Ketone (MEK), TT-M-261
C. References
(1) AMM 51-31-00/201, Seals and Sealing
D. Access
(1) Location Zones
830 Left Side Doors
840 Right Side Doors
E. Procedure
S 024-001-B00
CAUTION: BE CAREFUL WHEN YOU REMOVE THE SEALANT FROM THE EXTERNAL
_______ PORTION OF THE SCUFF PLATE. IF YOU ARE NOT CAREFUL, DAMAGE TO THE FUSELAGE SKIN CAN OCCUR.
(1) Remove the scuff plate fasteners.
NOTE: Be careful not to damage the scuff plate or the airplane
____
skin.
S 024-011-B00
(2) Remove the scuff plate.
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A
737-300/400/500
MAINTENANCE MANUAL
SCUFF PLATE
A SEE A
A
FWD
OUTBD
SCUFF PLATE
(RIGHT SIDE VIEW
FROM INSIDE AIRPLANE)
A
SCUFF PLATE
PRE-PACK PRE-PACK
LOWER MAIN SILL FAY SURFACE SEAL
SHEAR TIE
SKIN
OUTBD
A-A
Lower Sill Scuff Plate Sealing
Figure 401
F45202
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53-13-01
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A 737-300/400/500MAINTENANCE MANUAL
S 164-002-B00
WARNING: DO NOT GET METHYL ETHYL KETONE (MEK) IN YOUR MOUNT OR EYES, OR
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