...I have attempted to contact multiple departments including AA.com Web Services, AAdvantage Customer Service etc. to no avail and the problem continues to persist.

In September 2015, any itinerary which was associated with my AAdvantage number became inaccessible on AA.com. Since then, I have been unable to access the details on any of my itineraries. I have to call in every time to check for schedule changes. In fact, two itineraries in October 2016 were identified as having major schedule changes, which I would not have known about, had I not called in about them... it has been extremely inconvenient, and I have several trips coming up and the inability to view my reservation online means that I cannot select seats, check-in online or do anything else which I should be able to do on the website.

When I contacted the Web Services area, they performed a "Co-browse" with me which displayed to them the exact same "Unavailable" message which I receive when I attempt to access any of my itineraries. They said they would send a message to the programmers and web developers to fix this issue. It has now been almost 6 months and at this time I am still unable to access any of my Trips on the website. Note that any itinerary which is NOT associated with my AAdvantage number can be viewed on the website until my AAdvantage number is associated with it. Once associated, I cannot view the itinerary online...