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9/8/98 AC 43.13-1B Paragraph CONTENTS CHAPTER 1. WOOD STRUCTURE SECTION1. MATERIALSANDPRACTICES Page 1-1. General..........................................................................................................................................................1-1 1-2. Woods ........................................................................................................................................................... 1-1 Figure 1-1. Table 1-1. Figure 1-2. Relative Shrinkage of Wood Member Due to Drying...........................................................1-1 Selection and Properties of Aircraft Wood............................................................................1-3 Tapering of Faceplate ............................................................................................................1-3 1-3. Modified Wood Products .............................................................................................................................1-3 1-4. Adhesives......................................................................................................................................................1-3 1-5. Bonding Precautions.....................................................................................................................................1-5 1-6. Preparation of Wood Surfaces for Bonding.................................................................................................1-5 1-7. Applying the Adhesive .................................................................................................................................1-6 1-8. Assembly Time in Bonding..........................................................................................................................1-6 1-9. Bonding Temperature...................................................................................................................................1-6 1-10. Clamping Pressure........................................................................................................................................1-7 1-11. Method of Applying Pressure.......................................................................................................................1-7 1-12.1-17. [RESERVED.]..............................................................................................................................1-8 SECTION2. HEALTHANDSAFETY 1-18. General..........................................................................................................................................................1-9 1-19. Sanding in Areas of Existing Bond Joints and Finishes...............................................................................1-9 1-20. Handling of Adhesives and Finishes ............................................................................................................1-9 1-21.1-26. [RESERVED.]..............................................................................................................................1-9 SECTION 3. INSPECTION 1-27. General........................................................................................................................................................1-11 1-28. Types of Deterioration and Damage ..........................................................................................................1-11 1-29. Inspection Methods ....................................................................................................................................1-11 Figure 1-3. Likely Areas to Incur Structural Damage ............................................................................1-13 1-30.1-35. [RESERVED.]............................................................................................................................1-14 SECTION 4. REPAIRS 1-36. General........................................................................................................................................................1-15 1-37. Replacement of Drain Holes and Skin Stiffeners.......................................................................................1-15 1-38. Control Surface Flutter Precautions ...........................................................................................................1-15 1-39. Scarf Joints..................................................................................................................................................1-15 Figure 1-4. Consideration of Grain Direction When Making Scarf Joints ............................................1-15 1-40. Splicing of Spars.........................................................................................................................................1-15 Figure 1-5. Method of Splicing Solid or Laminated Rectangular Spars................................................1-17 Figure 1-6. Method of Splicing Solid “I” Spars .....................................................................................1-18 Figure 1-7. Repairs to Built-Up “I” Spar................................................................................................1-19 Figure 1-8. Method of Splicing Box Spar Flanges (Plate Method) .......................................................1-20 1-41. Spar Replacement .......................................................................................................................................1-16 1-42. Splicing of Box Spar Webs ........................................................................................................................1-16 Figure 1-9. Method of Splicing Box Spar Webs....................................................................................1-21 1-43. Replacing Solid-Type Spars With Laminated-Type Spars ........................................................................1-16 Page iiiPDF Image | AFS-640
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