Narrative:

I was training a trainee that is having difficulties and has been for a long time in training. I was focused on maintaining our separation on final and trying to get him to slow down air carrier and speed up aircraft ahead of him to ensure that we not lose separation. [The trainee] issued aircraft X 6000 on initial contact; [the controller] realized as soon as he said that it was wrong and said out loud that's wrong it needs to be 7000. [The controller] went back and told the aircraft to maintain 7000. The aircraft did not read it back. I should have caught the no read back but I moved back to the aircraft on final to ensure we had our separation. We were about to get relieved so I wanted the position to be clean and ready to give to the new controller. During the overlap; I did a final scan before I unplugged and I saw the aircraft level at 6000 and then realized I did not hear him read back 7000. The aircraft did not read back the 6000 either; but I knew [the controller] was going to give him 7000 so I did not correct the first hear back error. The trainee is struggling and I was very frustrated at this point in the session and was so focused on the final and speed control that I did not give the attention needed to aircraft X's read back. This is basic air traffic and I should have caught this mistake. I don't have any recommendations. The trainee makes bad decisions and I have to continuously correct them and explain over and over and over again why it won't work. I need to correct myself and not let a trainee continue to go when they are performing as poorly as this. If I would have been on position by myself I don't think I would have missed the read back because the session was not busy but the trainee made it busy.

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Original NASA ASRS Text

Title: Tracon Controllers reported the Developmental commanded an aircraft to descended below the MVA.

Narrative: I was training a trainee that is having difficulties and has been for a long time in training. I was focused on maintaining our separation on final and trying to get him to slow down air carrier and speed up aircraft ahead of him to ensure that we not lose separation. [The trainee] issued Aircraft X 6000 on initial contact; [the controller] realized as soon as he said that it was wrong and said out loud that's wrong it needs to be 7000. [The controller] went back and told the aircraft to maintain 7000. The aircraft did not read it back. I should have caught the no read back but I moved back to the aircraft on final to ensure we had our separation. We were about to get relieved so I wanted the position to be clean and ready to give to the new controller. During the overlap; I did a final scan before I unplugged and I saw the aircraft level at 6000 and then realized I did not hear him read back 7000. The aircraft did not read back the 6000 either; but I knew [the controller] was going to give him 7000 so I did not correct the first hear back error. The trainee is struggling and I was very frustrated at this point in the session and was so focused on the final and speed control that I did not give the attention needed to Aircraft X's read back. This is basic air traffic and I should have caught this mistake. I don't have any recommendations. The trainee makes bad decisions and I have to continuously correct them and explain over and over and over again why it won't work. I need to correct myself and not let a trainee continue to go when they are performing as poorly as this. If I would have been on position by myself I don't think I would have missed the read back because the session was not busy but the trainee made it busy.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.