AM.II.A.K11

From the FAA library

• Aviation Maintenance Technician Handbook - Airframep. 5-15
  Chapter 5: Aircraft Welding › Gas Welding Procedures & Techniques › Characteristics of a Good Weld

  Correct Forming of a Weld The form of the weld metal has considerable bearing upon the strength and fatigue resistance of a joint. The strength of an improperly made weld is usually less than the strength for which the joint ... designed. Low-strength welds are generally the result of insufficient penetration; undercutting of the base metal at the toe of the weld; poor fusion of the weld metal with the base metal; trapped oxides, slag, or gas pockets…

• Aviation Maintenance Technician Handbook - Airframep. 5-28
  Chapter 5: Aircraft Welding › Arc Welding Procedures, Techniques, & Welding Safety Equipment › Overhead Position Welding

  Figure 5-38. Typical lap joint fillet weld. When making fillet welds on overhead tee or lap joints, a short arc should be held, and there should be no weaving of the electrode. The arc motion should be controlled ... secure good penetration to the root of the weld and good fusion to the plates. If the molten metal becomes too fluid and tends to sag, the electrode should be whipped away quickly from the center ahead of the weld…

• Aviation Maintenance Technician Handbook - Airframep. 5-2
  Chapter 5: Aircraft Welding › Shielded Metal Arc Welding (SMAW)

  Shielded Metal Arc Welding (SMAW) Shielded metal arc welding (SMAW) is the most common type of welding and is usually referred to as “stick” welding. The equipment consists of a metal wire rod coated with a welding flux that ... voltage and high current in either alternating current (AC) or direct current (DC), depending on the type of welding being done. An arc is struck between the rod and the work and produces heat in excess…