DIMENSION A IS TO BE A DISTANCE THAT YOU CAN GET THE AXIAL MOVEMENT SPECIFIED IN THE DRIVE SHAFT REMOVAL/INSTALLATION PROCEDURES MACHINE SPLICE THE TUBE OD TO THE AVERAGE DRIVE SHAFT ID +0.000/-0.002 INCH 2024-T3 OR -T4 ALUMINUM BAR STOCK OR SEAMLESS TUBING 4130 SEAMLESS TUBING OR BAR STOCK, HEAT-TREATED TO 150 KSI (MINIMUM)
Drive Shaft Repairs
Figure 801
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A
747-400 MAINTENANCE MANUAL
E. Procedure
S 328-002
(1) Repair the defects with a minimum blend radius of one inch.
NOTE: The surface finish of the repair area must be 63 microinches
____ or better. The wall thickness can decrease to the limits shown in the subsequent table. If there are two or more defects, there must be a minimum distance of 1-1/2 times the diameter of the tube between the defects.
~............................................................................... | DEFECT DESCRIPTION | PERMITTED DEFECT DEPTH | | (Aluminum Alloy tube) | AFTER REWORK (in inches) | ................................................................................. | | TUBE OD/WALL THICKNESS | | ........................................................ | | 0.875/0.065 | 1.00/0.049 | 1.00/0.065 | 1.00/0.083 | | Extended Defect - More | | | | | | than 30% of tube | | | | | | circumference (helical | 0.007 | 0.005 | 0.007 | 0.009 | | or circular) or more | | | | | | than 3.0 inches long | | | | | ................................................................................. | Local Defect - 30% or | | | | | | less of tube | | | | | | circumference and 3.0 | 0.014 | 0.010 | 0.014 | 0.018 | | inches long or less | | | | | 2........................….............…............….............….............1
S 378-003
(2)
Do this task to apply the alodine to the repair area: "Apply the Alodine 1200 Solution" (Ref 51-21-04/701).
(3)
Apply the primer to the repair area.
S 378-004
TASK 27-81-05-308-005
3. Torque Tube Splice
__________________
A. Standard Tools and Equipment
(1)
Micrometers, to measure internally and externally
B.
Consumable Materials
(1)
B00352 Alodine 1200
(2)
C00432 Primer - BMS 10-11, Type I
C.
References
(1)
51-21-04/701, Alodized Surfaces
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A
747-400
MAINTENANCE MANUAL
(2)
IPC 27-81-51 Fig. 1
D.
Access
(1)
Location Zone
512 Krueger Flap Inboard, LH
513 Krueger Flap Midflap, LH
514 Krueger Flap Outboard, LH
522 Variable Camber Flap, LH
523 Variable Camber Flap, LH
524 Variable Camber Flap, LH
525 Variable Camber Flap, LH
526 Variable Camber Flap, LH
532 Variable Camber Flap, LH
533 Variable Camber Flap, LH
534 Variable Camber Flap, LH
535 Variable Camber Flap, LH
536 Variable Camber Flap, LH
537 Variable Camber Flap, LH
612 Krueger Flap Inboard, RH
613 Krueger Flap Midflap, RH
614 Krueger Flap Outboard, RH
622 Variable Camber Flap, RH
623 Variable Camber Flap, RH
624 Variable Camber Flap, RH
625 Variable Camber Flap, RH
626 Variable Camber Flap, RH
632 Variable Camber Flap, RH
633 Variable Camber Flap, RH
634 Variable Camber Flap, RH
635 Variable Camber Flap, RH
636 Variable Camber Flap, RH
637 Variable Camber Flap, RH
E.
Procedure
S 288-006
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