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When was the next transponder inspection due if the last was done on September 1, 2006?

  1. September 30, 2007

  2. September 30, 2008

  3. October 1, 2008

  4. August 31, 2008

The correct answer is: September 30, 2008

The correct choice is based on the regulations regarding the periodic inspection of aircraft transponders. According to FAA regulations, transponders must be inspected every 24 months. When the last inspection was completed on September 1, 2006, adding 24 months would lead to the next due date being September 1, 2008. However, since inspections are often recorded based on the last day of the month, this means the effective due date for compliance becomes the end of the month—August 31, 2008—if the last inspection was performed on the first day of the month. The choices provided represent potential misunderstanding of the 24-month rule or the application of the effective deadlines for inspection dates. Being precise about these intervals and when they apply is essential for maintenance scheduling and compliance with regulations during aviation operations.