Heat Treatment of Aluminum Alloys Air Furnace Heat Treatment of Aluminum Alloys Salt Bath

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 Page 116 Part 2 ✈ Chapter 3 - Checklists MRA – 1st Edition September 1998 Part 2 ✈ Chapter 2 - Airworthiness Audit Policy and Procedures Items References Result A-3 Are temperature uniformity surveys conducted? Are the survey results recorded and kept on file? QPM OK FDG NA A-4 Are the batch numbers or work order numbers entered on the temperature recording charts? QPM OK FDG NA A-5 Are pyrometric testing and calibration of equipment carried out? Are certificates available? QPM OK FDG NA A-6 Is the following data recorded for each furnace load: - the part and batch number; - the time in, time out and date; and - the quantity? QPM OK FDG NA A-7 Are laboratory test specimens included with the furnace load when required? QPM OK FDG NA A-8 Are parts hardness tested after heat-treatment? QPM OK FDG NA A-9 Are mechanical or metallurgical tests performed? QPM OK FDG NA Items Certified – Completed by:

3.8.12 Sulphuric AcidSodium Dichromate Etch

Items References Result A-1 Are specifications and processing procedures available to the operator and are they in use? QPM OK FDG NA