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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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747-400 MAINTENANCE MANUAL
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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