Originally Posted by
mrkymark
3. Delete the "160" and paste entire AA ticket # in the space "0011234567899" and proceed. (yes it will allow you to do this)
4. If it allows you in after this step, in my opinion you are golden. If not please arrive at the airport early or get on the phone with CX to update the right ticket number in to the Record Locator as there might be a mismatch somewhere.
Didn't know this worked. Will have to try on an upcoming itinerary.
Another way to check the ticket is go to AA refunds page, plug in the ticket number and confirm the flight/dates (and ticket issue date in case of changes) align with what you have booked.