If your transponder is inoperative, how far in advance must you request a deviation to enter Class B airspace?

The requirement to request a deviation to enter Class B airspace when your transponder is inoperative is best understood by considering the rules and procedures established for aircraft operations. Under the relevant regulations, if your transponder is not functioning, you must notify air traffic control (ATC) of your situation and request a deviation to enter Class B airspace.

While the specific wording of regulation may vary, it generally guides pilots to make such requests in a timely manner to ensure adequate processing time and safety for all aircraft involved. Requesting this deviation typically should be done at least one hour in advance of your intended operation in Class B airspace. This timeframe helps ATC manage air traffic and allows for the necessary adjustments to be made to accommodate your entry without causing disruptions or safety concerns.

Always remember that operational communication with ATC is critical, especially when you're unable to use equipment essential for compliance with airspace entry requirements.