United Airlines has confirmed that a flight attendant had mistakenly posted information on a public website that included access codes to the cockpit door, the airline confirmed.
The carrier emailed a ''safety alert'' to its employees that its flight deck access security procedures ''may have been compromised.''
''Some cockpit door access information may have been made public,'' United said in a statement.
''The risk of a breach of the flight deck door is strongly mitigated by carefully following the flight deck security procedures,'' the alert said. ''Remember this information is sensitive security information and sharing this with anyone not authorized or who does not have a need to know is strictly prohibited.''
According to the carrier, it was working on a ''corrective action plan,'' noting that pilots were asked to review procedures during briefings.
''We have learned that some cockpit door access information may have been made public. The safety of our customers and crew is our top priority and United utilizes a number of measures to keep our flight decks secure beyond door access information,'' United spokeswoman Maddie King told The Post in a statement.
''In the interim this protocol ensures our cockpits remain secure. We are working to resolve this issue as soon as possible.''
According to The Wall Street Journal, the flight attendant who posted the information online did so by accident.
In a statement to Business Insider, the airline said it used multiple methods, including access codes, to ensure security.
United did not spell out what other measures entailed, but according to the report , the airline also required pilots to visually verify a person's identity before granting access to the cockpit.
The airline was slammed in April after, it forcibly removed passenger David Dao, a 69-year-old doctor, from a flight from Chicago to Louisville, Kentucky (See: Shock wave over United Airlines' violent 'bumping' of passenger).