FAA Ground School Practice Test

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What must pilots avoid when making routine transponder code changes?

  1. Choosing the wrong frequency

  2. Selecting codes 7500, 7600, and 7700

  3. Inadvertently shutting off the transponder

  4. Using codes over 8000

The correct answer is: Selecting codes 7500, 7600, and 7700

Pilots must avoid selecting codes 7500, 7600, and 7700 when making routine transponder code changes because these codes are reserved for specific emergency situations. Code 7500 is used to indicate a hijacking, code 7600 is for loss of communication, and code 7700 signifies a general emergency. Using these codes during routine operations can lead to unnecessary alerts and responses from air traffic control, which can create confusion and compel emergency protocols that can divert valuable resources away from actual emergencies. It is important that pilots reserve these codes for their intended purposes to ensure clarity and safety in the airspace system.

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