Boeing 747 - Page 38

A
A
BB
DIRECTION
GRAIN
2
0.62
(15.7)
(41.1)
1.62
2.62
(66.5)
3
2
1
(5.1)
0.20
A-A
3.1
(79)
3.5
(89)
4.15
(105.4)
(25)
1.0
(25)
1.0
(13)
0.5
(25)
1.0
3.5
(89)
EDM NOTCH EDM NOTCH B-B
2.0
(51)
(24.1)
0.53 (13.4)
0.65 (16.5)
1
1
1
0.95
3
2
1
NDT4108
B
G F E
D
C
A
AND LET THE TEMPERATURE OF THE PART DECREASE TO AMBIENT IN STILL AIR.
MATERIAL: 433OM OR 434OM STEEL. THIS MATERIAL MUST BE NORMALIZED.
1. HEAT IN A FURNACE AT 1650 DEGREES FAHRENHEIT FOR 35 MINUTES
OR IN A SALT BATH OF EQUAL TEMPERATURE FOR 25 MINUTES.
TOLERANCE: ______INCHES
ALL DIMENSIONS ARE IN INCHES (MILLIMETERS ARE IN PARENTHESES)
2. AT THE END OF THE HEAT TIME, REMOVE THE PART FROM THE FURNACE (OR SALT BATH)
TO NORMALIZE, FOLLOW THESE STEPS:
_____ NOTES:
EDM NOTCH - 0.25 (6.3) LONG X 0.040 (1.02) DEEP
- MAXIMUM WIDTH = 0.030 (0.76)
ETCH OR STEEL STAMP THE STEP IDENTIFICATION LETTER AS SHOWN
X.XX = ± 0.1
X.X
= ± 0.25
X = ± 0.5
___________MILLIMETERS
X.XXX = ± 0.005
X.XX = ± 0.010
X.X = ± 0.020
SURFACE FINISH: 63 RA OR BETTER IS NECESSARY
ETCH OR STEEL STAMP THE REFERENCE STANDARD PART NUMBER NDT4108 AS SHOWN
2130638 S0000459161_V1
Reference Standard NDT4108
Figure 3
747
NONDESTRUCTIVE TEST MANUAL
PART 4 54-30-06
Page 8
Nov 15/2015D6-7170
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ALL