14 November 1996 Development of an acoustic emission test for aircraft fire extinguisher bottles
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An acoustic emission tester for aircraft Halon bottles has been developed. The necessary load is applied by heating the bottles. Acoustic emission is monitored during the heating by six sensors held in position by a special fixture. This fixture was designed to fit spheres with diameters between 5 and 16 inches. A prototype has been undergoing testing in two commercial Halon bottle repair and test facilities. Results to date indicate that about 97 percent of the bottles tested show no indications of any flaws. The other three percent have had indications of flaws in non-critical areas of the bottles. All bottles tested to date have passed the hydrostatic test required by the DOT.
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Allen G. Beattie, Allen G. Beattie, William W. Shurtleff, William W. Shurtleff, } "Development of an acoustic emission test for aircraft fire extinguisher bottles", Proc. SPIE 2945, Nondestructive Evaluation of Aging Aircraft, Airports, and Aerospace Hardware, (14 November 1996); doi: 10.1117/12.259097; https://doi.org/10.1117/12.259097

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