53-51-01
 ALL  ú ú 01 Page 503 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
D20771
A
747-400
MAINTENANCE MANUAL

STA 1007
STA 1026
STA 1050
STA 1078 1
STA 1109
STA 1139
STA 1003
C
STA 1167
STA 1022

STA 1044 STA 1193
C STA 1061 STA 1221 STA 1083
STA 1112
2 STA 1142
STA 1170
STA 1200
12 RUB STRIP
WING SKINWING SKIN SEAL
SEAL EDGE
CLEARANCE RUB BLOCK DIMENSION SEAL CLEARANCE DIMENSION
TURNBUCKLE THE FIRST HOLE IN THE FRAMEFAIRING WITH THE FAIRING PANEL REMOVEDPANEL
INTERCOSTAL
UNDERWING FAIRING SEAL CLEARANCE
(EXAMPLE)
C-C

1 THE MEASUREMENT LOCATIONS WITH THE FAIRING PANEL INSTALLED
2 THE MEASUREMENT LOCATIONS WITH THE FAIRING PANEL REMOVED
Wing-to-Body Fairing Adjustment
Figure 501 (Sheet 3)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 53-51-01
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 C.  Measure the Seal Clearances with the Fairing Panel Installed.
 S 225-012
 (1)  
Use the chart below to measure the seal clearance (Fig. 501): ~......................................................... | THE FAIRING PANEL INSTALLED | ........................................................... | Body | Seal Clearance Dimension | | Station | (+/- 0.03 inch) | ........................................................... | |1007 | 0.55 | ........................................................... | 1026 | 0.56 | ........................................................... | 1050 | 0.54 | ........................................................... | 1078 | 0.53 | ........................................................... | 1109 | 0.53 | ........................................................... | 1139 | 0.58 | ........................................................... | 1167 | 0.60 | ........................................................... | 1193 | 0.64 | ........................................................... | 1221 | 0.67 | 2.......................….................................1

 S 225-008

 (2)  
Measure the seal clearances with the fairing panel removed if it is necessary.

 D.  Measure the Seal Clearances with the Fairing Panel Removed.
 S 025-003
 (1)  Remove the fairing panel (Ref 53-51-01/401).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 225-007
 (2)  Use the chart below to measure the seal clearance (Fig. 501):
 NOTE: Measure the clearance from the first fastener hole in
____
 the frame.

 ~.........................................................
 | FAIRING PANEL REMOVED |
 ...........................................................
 | Body | Seal clearance Dimension |
 | Station| (+/- 0.03 inch) |
 ...........................................................
 | 1003 | 1.09 |
 ...........................................................
 | 1022 | 1.09 |
 ...........................................................
 | 1044 | 1.13 |
 ...........................................................
 | 1061 | 1.18 |
 ...........................................................
 | 1083 | 1.14 |
 ...........................................................
 | 1112 | 1.26 |
 ...........................................................
 | 1142 | 1.40 |
 ...........................................................
 | 1170 | 1.48 |
 ...........................................................
 | 1200 | 1.61 |
 2.......................….................................1

 S 825-009
 (3)  
Adjust the turnbuckle to get the dimensions in the chart.
　
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