Use of Inspection Gage After Swage of Rynglok Fittings
Figure 840
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747-400 MAINTENANCE MANUAL
INSPECTION MARK
POSITION MARK
MINIMUM INSPECTION MARK AFTER SWAGING
INSPECTION MARK
POSITION MARK
MAXIMUM INSPECTION MARK AFTER SWAGING
Use of Inspection Gage After Swage of Rynglok Fittings
Figure 841
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MAINTENANCE MANUAL
INCH (mm) CONDUIT SIZE (OD) INCH (mm) MAXIMUM DENT DEPTH
0.25 (6.35) 0.050 (1.27)
0.31 (7.87) 0.063 (1.60)
0.38 (9.65) 0.075 (1.90)
0.50 (12.70) 0.100 (2.54)
0.63 (16.00) 0.125 (3.17)
0.75 (19.05) 0.150 (3.81)
0.88 (22.85) 0.175 (4.45)
1.00 (25.40) 0.200 (5.08)
1.25 (31.75) 0.250 (6.35)
1.50 (38.10) 0.300 (7.62)
1.75 (44.45) 0.350 (8.89)
2.00 (50.80) 0.400 (10.16)
Smooth Dent Damage Limits for Electrical Rigid Conduits
Figure 842
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MAINTENANCE MANUAL
WRINKLE MEASUREMENTS
Permitted Forming Limits for Electrical Rigid Conduits Figure 843 (Sheet 1)
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MAINTENANCE MANUAL
CONDUIT SIZE (OD) OVER 1.0 1.0 OR LESS CONDUIT MATERIAL STAINLESS STEEL ALUMINUM ALLOY STAINLESS STEEL ALUMINUM ALLOY ALLOWABLE WRINKLE INCH (mm) HEIGHT 0.040 (1.016) 0.020 (0.508) 0.060 (1.524) 0.030 (0.762) (PERCENT OF ALLOWABLE OVALITY SPECIFIED OD) 10 10 10 10
Permitted Forming Limits for Electrical Rigid Conduits
Figure 843 (Sheet 2)
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747-400 MAINTENANCE MANUAL
ALUMINUM FOIL MARKERS - REMOVAL/INSTALLATION
____________________________________________
1. General_______
A. This procedure contains two tasks. The first task is the removal of aluminum foil markers. The second task is the installation of aluminum foil markers.
B. Replace aluminum foil markers that have creases, torn edges, or words you cannot read.
C. Replace aluminum foil markers that have a poor bond on external primed or painted surfaces.
D. Remove and replace aluminum foil markers that have a poor bond on internal primed or painted surfaces.
E. Remove and replace aluminum foil markers that have a poor bond on bare metal surfaces.
NOTE: For aluminum foil markers that you install over textured
____ surfaces or that have a poor bond, you can use the procedure for pressure-sensitive placards. This gives a better installation (AMM 20-11-16/401).
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