Boeing 747 - Page 30

(ADJACENT STRUCTURE
IS NOT SHOWN)
MIDSPAR FITTING
USUAL BACK SURFACE SIGNAL. THE
LOCATION OF THE BACK SURFACE
SIGNAL WILL CHANGE WHEN FUSE PINS
OF DIFFERENT LENGTHS ARE EXAMINED.
SEE TABLE I FOR THE CORRECT
LOCATION OF THE SIGNALS FOR EACH
FUSE
PIN PART NUMBER.
0
2
4
6
8
10
60%
40%
20%
100%
80%
TRANSDUCER
FUSE PIN WITH
INSERT REMOVED
TRANSDUCER
GUIDE
____
NOTE:
BACK SURFACE SIGNAL FOLLOWED BY MODE CONVERSION SIGNALS
MONITOR
THIS AREA DURING THE NEAR SIDE INSPECTION
INITIAL PULSE SIGNAL
INSPECTION AREA
3
1
2
2
1
3
10
2 864
4
2
0
0
/
P
+1
A
U
D
E
60
4020
0
0
%
10
8
6
OFF
1
5
2.25
+5
10N
10P
OFF
ON
2130621 S0000459157_V1
Fuse Pin Inspection Area
Figure 6
747
NONDESTRUCTIVE TEST MANUAL
PART 4 54-30-05
Page 10
Nov 15/2015D6-7170
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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