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AC 43.13-1B 9/8/98 TABLE 5-7. Acceptable ultrasonic inspection methods associated with the example bonded structure configurations shown in figure 5-21. NUMBER 2 ACCEPTABLE METHODS Pulse-echo, straight beam, on each skin. 1 Either (a) Pulse-echo straight or angle beam, on each side or (b) Through-transmission. 3 Refer to 1 for methods. If all these methods fail to have sufficient penetration power to detect reference defects in the reference standard, then the ringing method, applied from both sides, should be used. Otherwise, the ringing method is unacceptable. 4 Either (a) Ringing, on each skin of the doubler. or (b) Through-transmission or (c) Damping. 5 6 Ringing. Through-transmission. Dotted Line represents beam direction. 7 Either (a) Through-transmission or (b) Damping. NOTE A variety of ultrasonic testing methods and instruments are available for adaptation to specific inspection problems. Other bond inspection instruments can be used if detailed procedures are developed and proven on the applicable reference standards for each configuration of interest. Some representative in- struments, which can be used for the inspection of bonded structures are; the Sondicator, Harmonic Bond Tester, Acoustic Flaw Detector, Audible Bond Tester, Fokker Bond Tester, 210 Bond Tester, and Bon- dascope 2100. Page 5-48 Par 5-95PDF Image | AFS-640
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