A Delta Air Lines flight from Salt Lake City to Portland experienced cabin pressurization issues, causing several passengers to suffer from bleeding eardrums, noses, and headaches. The Boeing 737-900ER, carrying 140 passengers, had to make an emergency landing back in Salt Lake City. Oxygen masks did not deploy, and many passengers reported severe ear pain and bleeding. Paramedics evaluated or treated 10 passengers upon landing, with Delta offering to cover transportation to medical facilities. The Federal Aviation Administration is investigating the incident. Delta has since apologized, stating the aircraft was fixed and returned to service the following day.