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747-400 MAINTENANCE MANUAL
 (6)  S 344-055If you can not install a bolt (2) in a location, do these steps: (a) Fill the bolt hole with sealant. (b) Make a spanning strap on the top of this bolt hole (Fig. 406). (c) Install the spanning strap.
 (7)  S 214-058Make sure the inner edge of the wiper ramp touches the glass tightly.
 (8)  S 224-059Make sure the clearance between the glass and the wiper ramp at the other edges is 0.03 inch or less.
 S 434-060

 CAUTION:_______DO NOT APPLY TOO MUCH TORQUE TO THE BOLTS (2). TOO MUCH TORQUE CAN CAUSE DAMAGE TO THE NUTS AND THE NUTPLATE RETAINERS.
 (9)  
Tighten the bolts (2) to 50-70 pound-inches in the sequence shown (Fig. 404).

 S 424-108

 (10)
 Make sure 1 to 3 threads of the bolt show on the backside of the nutplate.

 NOTE: If less than 1 thread shows through the backside of the
____ nutplate, install the next size longer bolt. If more than 3 threads show through the backside of the nutplate, install the next size shorter bolt. Bolt 69B10006-17 is not subject to this three thread protrusion limit.
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1

BOLT NUMBER
25 26 27 28 29

72
LEFT NO. 1 WINDSHIELD SHOWN
RIGHT NO.1 WINDSHIELD OPPOSITE

BOLT NUMBER  BOLT NUMBER  BOLT NUMBER  BOLT NUMBER 
STEP  SEQUENCE FOR  SEQUENCE FOR  STEP  SEQUENCE FOR  SEQUENCE FOR 
NO.  THE INITIAL  THE FINAL  NO.  THE INITIAL  THE FINAL 
INSTALLATION  TORQUE  INSTALLATION  TORQUE 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
65 TO 63 13 TO 15 62 TO 60 16 TO 18 59 TO 57 19 TO 21 56,55 22 TO 24 93 TO 91 33 TO 35 90 TO 88 36,37 87 TO 85 38,39 84,83 72 TO 74 12 TO 10 55 TO 57 9 TO 7 58 TO 60 6 TO 4 61 TO 63 3 TO 1 64,65 22 TO 24 66 TO 68 25 TO 27 69 TO 71 83 TO 85 33 TO 35 86 TO 88 36,37
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
25 TO 27 75 TO 77 28 TO 30 78 TO 80 31,32 81,82 54 TO 52 12 TO 10 51 TO 49 9 TO 7 48 TO 46 6 TO 4 45 TO 43 3 TO 1 42 TO 40 66 TO 71 89 TO 91 38,39 92,93 72 TO 75 28 TO 30 76 TO 79 31,32 80 TO 82 54 TO 51 21 TO 19 50 TO 47 18 TO 16 46 TO 43 15 TO 13 42 TO 40
Windshield Fastener Installation
Figure 404 (Sheet 1)

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747-400
MAINTENANCE MANUAL

5049 4847464544 43 42 41 40
UP
WIPER RAMP LOCATION

WINDSHIELD

RETAINING BOLT (EXAMPLE)
Windshield Fastener Installation
Figure 404 (Sheet 2)

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747-400 MAINTENANCE MANUAL
 S 434-112
 (11)
 Tighten the bolts (2) to 50 - 70 pound-inches again in the sequence shown (Fig. 404).

 S 394-087

 (12)
 Clean off all the sealant from the bolt heads.

 S 224-032

 (13)
 Make sure the windshield is smooth or comes out from the external surface less than 0.03 inch or in from the internal surface less than 0.08.

Aerodynamic Smoother Application
Figure 405

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