Labor-management disputes at the airlines always raise the concern that safety may be affected. Usually, the concerns focus on the workplace tensions that arise when management and labor are involved in protracted disputes. Those workplace tensions can destroy the collaborative atmosphere important to aviation safety. They can also add stress to workers that can affect their ability to do their jobs properly.
Of course, protracted disputes can lead to even worse outcomes. One of the worst-case scenarios of such disputes recently played out in the news of an American Airlines mechanic who was arrested for allegedly sabotaging a Boeing 737-800 at Miami International Airport. According to an FBI affidavit, the mechanic tampered with the air data module system, a critical component of the aircraft’s navigation system, responsible for providing information—such as airspeed and altitude—for display in the cockpit. As the aircraft was taxiing for departure on July 17, the crew powered up the engines and noticed an error message for the system. An inspection of the aircraft found that a pitot tube had been blocked with foam.