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AFS-640

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AFS-640 ( afs-640 )

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9/8/98 AC 43.13-1B b. Detection Distance. Ultrasonic energy in the relatively low-frequency range of 30-50 KHz travels easily through air; there- fore, an ultrasonic leak detector can detect leakage with the probe located away from the leak. The maximum detection distance de- pends on the leakage rate. c. Typical Applications. Some typical applications for the ultrasonic leak detector on aircraft are: fuel system pressurization tests, air ducts and air conditioning systems, emergency evacuation slides, tire pressure retention, elec- trical discharge, oxygen lines and valves, in- ternal leaks in hydraulic valves and actuators, fuel cell testing, identifying cavitation in hy- draulic pumps, arcing in wave guides, cabin and cockpit window and door seals, and cabin pressurization testing. 5-98.5-104. [RESERVED.] Par 5-97 Page 5-51 (and 5-52)

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