Https://mcmanuslab.ucsf.edu/sites/mcmanuslab.ucsf.edu/files/2025-07/american-airlines-u-s-help-numbers-the-ultimate-2025-contact-guide.pdf https://mcmanuslab.ucsf.edu/sites/mcmanuslab.ucsf.edu/files/2025-07/american-airlines-u-s-help-numbers-the-ultimate-2025-contact-guide.pdf