Dichromate Treatment of Magnesium Alloys

Page 114 Part 2 ✈ Chapter 3 - Checklists MRA – 1st Edition September 1998 Part 2 ✈ Chapter 2 - Airworthiness Audit Policy and Procedures

3.8.9 Heat Treatment of Aluminum Alloys Air Furnace

References Result A-1 Does the manufacturer have qualified personnel to inspect and control the heat-treatment process? QPM OK FDG NA A-2 Are process instructions available to the operators and inspectors? QPM OK FDG NA A-3 Are temperature uniformity surveys carried out? Are results of surveys recorded and kept on file? QPM OK FDG NA A-4 Is pyrometric testing and calibration of equipment carried out? QPM OK FDG NA A-5 Are parts cleaned before any heating operation? Are parts racked to allow circulation? QPM OK FDG NA A-6 Are parts quenched as rapidly as possible? Is water agitated during quenching? QPM OK FDG NA A-7 How is the refrigeration temperature controlled for the storage of heat-treated parts? QPM OK FDG NA A-8 Is batch number or work order number, time in and time out, and date recorded on temperature instrument charts? QPM OK FDG NA Items Certified – Completed by:

3.8.10 Heat Treatment of Aluminum Alloys Salt Bath

Items References Result A-1 Does the manufacturer have personnel qualified to inspect and QPM OK FDG NA Part 2 ✈ Chapter 3 - Checklists Page 115 Part 2 - Airworthiness Audit Policy and Procedures MRA – 1 st Edition September 1998 Items References Result control the heat-treatment process? A-2 Are process instructions available to the operators and inspectors? QPM OK FDG NA A-3 Are temperature uniformity surveys conducted? Are the survey results recorded and kept on file? QPM OK FDG NA A-4 Is material identified before processing? QPM OK FDG NA A-5 Are parts cleaned prior to heat treatment? QPM OK FDG NA A-6 Are parts quenched as rapidly as possible? QPM OK FDG NA A-7 Is the surface of the salt bath clean? QPM OK FDG NA A-8 Are salt-bath analyses conducted? Are records available? QPM OK FDG NA A-9 Are instrument certification decals current? QPM OK FDG NA A-10 Is the batch number or work order number recorded on the temperature instrument chart? QPM OK FDG NA Items Certified – Completed by:

3.8.11 Heat Treatment of Steel

Items References Result A-1 Does the manufacturer have personnel qualified to inspect and control the heat-treatment process? QPM OK FDG NA A-2 Are process instructions available to the operators and inspectors? QPM OK FDG NA