The number of aircraft taken out of service has remained at more than twice the normal daily average of 20, the airline said Tuesday, and there is "no common theme" among the reported mechanical issues. The airline has about 750 Boeing Co. 737 planes and make almost 4,000 aircraft every day.
Aircraft Mechanics Fraternal Association, which represents 2,700 Southwest employees, said members were working as usual. The Mechanical Society rejected a preliminary contract agreement in September.
"The members are working on normal schedules, and normally work overtime," said Bret Oestreich, the Union's national director, who said late last week. "Overtime may have increased with workload."
Mary Schlangenstein, Bloomberg