Boeing 747 - Page 79

INTERNAL REFLECTIONS - IGNORE THESE SIGNALS
FUSE PIN PART NUMBER
FOR THE CORRECT LOCATION OF THE SIGNALS FOR EACH
DIFFERENT LENGTHS ARE EXAMINED. REFER TO TABLE 1
SURFACE SIGNAL WILL CHANGE WHEN FUSE PINS OF
BACK SURFACE SIGNAL. THE LOCATION OF THE BACK
TRANSDUCER INSPECTION AREA
MONITOR THIS AREA DURING THE INSPECTION
INITIAL PULSE SIGNAL
ADJACENT STRUCTURE IS NOT SHOWN
_____
NOTES:
FUSE PIN
BUSHING
4
2
6
8
0
10
100%
80%
20%
40%
60%
UPPER LINK
1
3
2
4
1
3
2
4
2131073 S0000459189_V1
Fuse Pin Inspection Area
Figure 6
747
NONDESTRUCTIVE TEST MANUAL
PART 4 54-30-09
Page 11
Nov 15/2015D6-7170
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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