Portable electronic devices which may cause interference with the navigation or communication system may not be operated on a U.S.- registered civil aircraft being flown

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To act as pilot in command of an airplane towing a glider, the tow pilot is required to have

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If an ATC transponder installed in an aircraft has not been tested, inspected, and found to comply with regulations within a specified period, what is the limitation on its use?

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No person may operate an aircraft in simulated instrument flight conditions unless the

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