Aluminum Brazing Dip Brazing

Part 2 ✈ Chapter 3 - Checklists Page 119 Part 2 - Airworthiness Audit Policy and Procedures MRA – 1 st Edition September 1998 Items References Result A-10 Do parts undergo NDT for internal defects? QPM OK FDG NA Items Certified – Completed by:

3.8.15 Fusion Welding

Items References Result A-1 Are welders qualifiedcertified? QPM OK FDG NA A-2 Are the surfaces of all parts to be joined free from foreign matter oil, grease, paint, dirt, scale, electroplating or other contaminants? QPM OK FDG NA A-3 Are the interior walls of all tubing thoroughly cleaned of filings, chips and other foreign matter? QPM OK FDG NA A-4 Are welded joints free from slag, flux, and so on? QPM OK FDG NA A-5 Are fusion-welded parts visually inspected for: - convexity, concavity and size beads; - undercutting, overlapping and excessive penetration; - cracks, porosity and inclusions; and - other metallic discontinuities? QPM OK FDG NA A-6 Are radiographic, magnetic-particle, fluorescent-penetrant andor pressure-test inspections carried out in accordance with the relevant schedule? QPM OK FDG NA Page 120 Part 2 ✈ Chapter 3 - Checklists MRA – 1st Edition September 1998 Part 2 ✈ Chapter 2 - Airworthiness Audit Policy and Procedures Items References Result Items Certified – Completed by:

3.8.16 Metallic Arc Welding

Items References Result A-1 Are welders qualifiedcertified? QPM OK FDG NA A-2 Are the electrode manufacturers recommendations or drawing requirements observed with regard to current, polarity, and so on? QPM OK FDG NA A-3 Is the type of electrode used suitable for the material being welded? QPM OK FDG NA A-4 Are pre-heat and post-heat requirements adhered to? QPM OK FDG NA A-5 Are electrodes identified and properly stored? QPM OK FDG NA Items Certified – Completed by:

3.8.17 Tungsten Inert Gas TIG Shielded-Arc Welding

Items References Result A-1 Are welders qualifiedcertified? QPM OK FDG NA A-2 Are the various types of metals to be welded cleaned in compliance with the process standards applicable to each type? QPM OK FDG NA A-3 Is the time lapse between cleaning and welding minimised? QPM OK FDG NA A-4 Are welding rods identified and properly stored? QPM OK FDG NA