TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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6-32. Ultrasonic Inspection of Cylinder through e, contain the procedure for using Barrel (Part No. 10865297, FSN cylinder barrel tester on part No. 10865297 2815-765-9711) (2815-765-9711) cylinder only. a. General. The following paragraphs, b Figure 6-52. Cylinder barrel tester - 4910-937-4261. b. Description of Test Equipment. (1) Reflectoscope. An electronic instrument to provide means of transmitting and receiving pulsed ultrasonic energy, and interpretation for detection of flaws in the cylinder. (2) Search unit fixture. An adapter that directs ultrasonic energy into the proper area of the cylinder assembly, and is oriented to receive energy reflected back from defective areas. (3) Master checking cylinder. A portion of the cylinder, properly prepared with a specific defect, to act as a comparator tool. This cylinder compares to a no-go gage relative to cracks in the cylinder. 6-60 c. Functional Description of Equipment. (1) General. This inspection technique utilizes ultrasonic wave propagation for a non- destructive method of finding incipient cracks in the cylinder. The principle of ultrasonic flaw detection employs short bursts of high frequency sound vibrations, generated by a piezoelectric probe, transmitted into the cylinder barrel being inspected. Should a crack or discontinuity exist in the barrel, some of the sound wave energy will be reflected back to the source. A return sound wave, or echo, is converted into electrical energy which is displayed on the screen as a vertical indication on the horizontal (time) base line.