Narrative:

Intercepting final to runway 22. Cleared visual just outside final approach fix at 5;400 ft. Clearance a little late and overshot final. As I was correcting back I misread final approach altitude. It was 5;400 ft. For some unknown reason I 'saw' the 4 and dialed in 4;000 ft. And started to descend to 4;000 ft. It was 5;400 ft. The first officer said I was at 900 ft. AGL 7 miles from the runway. It took me a few seconds to process what he was saying when I realized my mistake. I climbed back to a good glideslope altitude and landed uneventfully. During this process I entered a restricted area located on final. I called tower controller and asked about it. He gave me TRACON number and he told me I had indeed entered the restricted area. I briefed the RNAV-Y to runway 22. As I was being vectored for the visual I realized the aircraft was not certified for RNAV approaches. I pointed that out to the first officer and said it's VMC and we will just use the approach as guidance. As I look back on the event I realize my situational awareness was not very sharp. When I was cleared the visual I misread the final approach altitude. We started the day in ZZZ. We had an MEL that took us 3 hours to resolve. This lead us to a disconnect and a recovery obligation. We got to ZZZ1 now with 30 minutes to connect to the newly assigned ama leg. After the debacle that was in ZZZ and the unknown future of our next few days I would have to say my head was not in the game as it should have been. I offer no excuses just stating the facts. I'm not really sure. I did allow myself to not be fully focused on the task at hand. The ACARS reassignment going to ZZZ1; the frustration associated with the MEL situation and the short turn time did not help. I had never been to ama before and I normally take time to read everything associated with the airport and environment. I did not do that as I felt rushed. Yep; it happened to me. I said it never would. I'm a better pilot than that.

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Original NASA ASRS Text

Title: A319 Captain reported that unfamiliarity and distraction on approach resulted in a clearance deviation and violation of Restricted airspace.

Narrative: Intercepting final to Runway 22. Cleared visual just outside final approach fix at 5;400 ft. Clearance a little late and overshot final. As I was correcting back I misread final approach altitude. It was 5;400 ft. For some unknown reason I 'saw' the 4 and dialed in 4;000 ft. and started to descend to 4;000 ft. It was 5;400 ft. The First Officer said I was at 900 ft. AGL 7 miles from the runway. It took me a few seconds to process what he was saying when I realized my mistake. I climbed back to a good glideslope altitude and landed uneventfully. During this process I entered a restricted area located on final. I called Tower Controller and asked about it. He gave me TRACON number and he told me I had indeed entered the restricted area. I briefed the RNAV-Y to Runway 22. As I was being vectored for the visual I realized the aircraft was not certified for RNAV approaches. I pointed that out to the First Officer and said it's VMC and we will just use the approach as guidance. As I look back on the event I realize my situational awareness was not very sharp. When I was cleared the visual I misread the final approach altitude. We started the day in ZZZ. We had an MEL that took us 3 hours to resolve. This lead us to a disconnect and a recovery obligation. We got to ZZZ1 now with 30 minutes to connect to the newly assigned AMA leg. After the debacle that was in ZZZ and the unknown future of our next few days I would have to say my head was not in the game as it should have been. I offer no excuses just stating the facts. I'm not really sure. I did allow myself to not be fully focused on the task at hand. The ACARS reassignment going to ZZZ1; the frustration associated with the MEL situation and the short turn time did not help. I had never been to AMA before and I normally take time to read everything associated with the airport and environment. I did not do that as I felt rushed. Yep; it happened to me. I said it never would. I'm a better pilot than that.

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.