No person may use an ATC transponder unless it has been tested and inspected within at least the preceding

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When operating an aircraft at cabin pressure altitudes above 12,500 feet MSL up to and including 14,000 feet MSL, supplemental oxygen shall be used during

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What aircraft inspections are required for rental aircraft that are also used for flight instruction?

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If an aircraft is involved in an accident which results in substantial damage to the aircraft, the nearest NTSB field office should be notified

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