Seventy flights from Southwest Airlines Co. were canceled on Monday as the inspection of Boeing 737 planes continued. The action was implemented after a Southwest plane with a hole in its fuselage had an emergency landing on Friday.

Southwest’s Flight 812 was supposed to head to Sacramento from Phoenix when a 5-foot long tear opened its fuselage about 20 minutes after it had taken off the airport. Southwest only runs Boeing 737 planes.

Whitney Eichinger, spokeswoman of Southwest Airlines, said seventy flights out of around 3,400 daily flights were canceled on Monday. She said out of seventy-nine older models of Boeing 737-300 that were inspected after the incident last Friday, thirty-three of them had been conferred back to service.

Over the weekend, Southwest Airlines canceled about 600 flights as it inspected 737-300 planes for cracks in fuselage and fatigue. The discount airline said there were cracks found in two other planes.

The Boeing Company has no immediate reply on Monday. According to aviation officials, the aircraft manufacturer is expected to render service bulletin to 737-300 operators all over the world to inspect the planes affected, particularly those of heavy use. Currently, there are about 280 Boeing 737-300s in the United States and a total of 900 around the world.

Analyst James Higgins of Soleil Securities said the cancellations of the Southwest flights might cause the company some revenue loss, However, he doesn’t think the effects of the incident will last.

On Monday morning trading, Southwest’s shares dropped 2.6 percent at $12.34. Meanwhile, shares of Boeing dropped 0.2 percent at $73.84.

A huge winter storm overwhelmed airports on Wednesday which caused airlines to cancel more than 6,000 flights for the second day in a row. They gave up all flights in or out of Chicago, where for a while the only plane that landed at O’Hare International brought the Blackhawks hockey team.

The airlines have canceled more than 13,000 flights in two days, according to flight tracking service FlightAware.com. The cancellations were focused at O’Hare, one of the most important air hubs in the nation.

The airlines’ decision to stop flying in Chicago waved out to airports situated around the country since even travelers who aren’t destined to go to Chicago catch connecting flights there on American or United, which use O’Hare as a hub.

Snow and ice hampered flights elsewhere too. Southwest Airlines Co. canceled some morning flights on Wednesday from Columbus, Ohio, and its entire morning of flights from Dallas.

There were 474 flights going in and out of Boston that were cancelled and 639 at New York LaGuardia, according to FlightAware. In total, there were 1,356 flights were scrubbed at the three large New York-area airports as a result of the ice and snow.

American Airlines was more troubled by a slowdown at its largest hub in Dallas after ice layered the runways on Tuesday. The sum of 1,600 cancellations by American, as well as regional partner American Eagle already added up to almost half of their schedule, spokesman Tim Smith said.

A charter flight bringing the hockey team Chicago Blackhawks landed around noon although most airlines stopped trying to fly by Tuesday night at O’Hare. Steve Kasteler said it is critical for the team to arrive home and rest.