Boeing 747 - Page 94

REFERENCE STANDARD BACK SURFACE SIGNAL
NOTES:
THE TRANSDUCER GUIDES
ARE NOT SHOWN FOR CLARITY.
_____
WITH THE TRANSDUCER AT POSITION X
NOTCH 2 SIGNAL WITH THE TRANSDUCER
NOTCH 1 SIGNAL WITH THE TRANSDUCER
AT POSITION Z
AT POSITION Y
INTERNAL REFLECTION
10
8 9
75 6
4
3
1
2
0
POSITION Y
POSITION Z
POSITION X
NOTCH 1
NOTCH 2
1
2
3
4
4
2
3
1
2131086 S0000459198_V1
Reference Standard NDT4123 Calibration
Figure 8
747
NONDESTRUCTIVE TEST MANUAL
PART 4 54-30-10
Page 14
Nov 15/2015D6-7170
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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