After failing a practical test for the second time, an applicant may apply for retesting after what conditions are met?

The requirement for an applicant who has failed a practical test for the second time to receive necessary training and an endorsement specifically from the instructor who provided that training emphasizes the importance of aligned instruction and familiarity with the applicant's specific areas of deficiency. This ensures that the instructor who gave the training is fully aware of the applicant's performance and can effectively endorse their readiness to retake the test based on tailored and focused instruction.

This approach also reinforces consistency in training methods and promotes a thorough understanding of the skills that need improvement. The instructor who provided the training can provide specific guidance and feedback that is necessary for the applicant to successfully demonstrate proficiency.

In contrast, the other options suggest either less rigorous conditions for endorsement or requirements that do not necessarily ensure the applicant has addressed the critical areas that led to the failed attempts. For example, receiving an endorsement from any instructor does not guarantee that the new instructor is knowledgeable about the specifics of the applicant's shortcomings. Similarly, simply completing additional flight hours or waiting a set period of time does not necessarily ensure that the applicant has received adequate training tailored to their previous performance issues.