Boeing 747 - Page 26

SURFACE FINISH: 63 RA OR BETTER IS NECESSARY
DIRECTION
(OR SALT BATH) AND LET THE TEMPERATURE OF THE PART DECREASE TO AMBIENT.
A-A
0.20
(5.1)
GRAIN
B-B
NDT4106
(114)
(91)
3.6
4.1
(104)
4.5
(25)
1.0
(9.4)
0.37
(20)
0.8
(15)
0.6
(25)
1.0
(25)
1.0
(25)
1.0
___________
X.XX = ± 0.1
X.X
= ± 0.25
X = ± 0.5
______
OR IN A SALT BATH OF EQUAL TEMPERATURE FOR 25 MINUTES.
1. HEAT IN A FURNACE AT 1650 DEGREES FAHRENHEIT FOR 35 MINUTES
2. AT THE END OF THE HEAT TIME, REMOVE THE PART FROM THE FURNACE
THIS MATERIAL MUST BE NORMALIZED. TO NORMALIZE, FOLLOW THESE STEPS:
TOLERANCE: INCHES MILLIMETERS
ALL DIMENSIONS ARE IN INCHES (MILLIMETERS ARE IN PARENTHESES)
X.XXX = ± 0.005
X.XX = ± 0.010
X.X = ± 0.020
MAXIMUM WIDTH = 0.030 (0.76)
EDM NOTCH - 0.25 (6.3) LONG X 0.040 (1.02) DEEP
ETCH
OR STEEL STAMP THE REFERENCE STANDARD PART NUMBER NDT4106 AS SHOWN
ETCH OR STEEL STAMP THE STEP IDENTIFICATION LETTER AS SHOWN
NOTES:
______
A
B C
(34.8)
1.37
(60.2)
2.37
MATERIAL: 4330M OR 4340M STEEL BAR AS SPECIFIED IN BOEING MATERIAL SPECIFICATION (BMS) 7-122.
EDM NOTCH
EDM NOTCH
2
1
1
B
B
A
1
A
1
2
3
3
2130615 S0000459153_V1
Reference Standard NDT4106
Figure 2
747
NONDESTRUCTIVE TEST MANUAL
PART 4 54-30-05
Page 6
Nov 15/2015D6-7170
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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