David Schaper

Updated at 8:30 p.m. ET

With American Airlines joining United in pulling 737 Max planes from their schedules and cancelling flights into early November, many travel industry observers are bracing for the next shoe to drop: higher priced fares and cancelled flights for the Thanksgiving and Christmas holidays season.

American Airlines announced Monday it is pulling the 737 Max from its schedule through Nov. 2, canceling about 115 flights per day. American reported last week that the Max grounding has already cost the airline $185 million in lost revenue.

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The Federal Aviation Administration says there's a new problem with some of Boeing's 737 commercial jets. More than 300 of the planes, including some of the grounded Max versions of the jets, may have faulty parts on their wings.

Though the problem is not considered something that could lead to a crash, Boeing is contacting airlines that own the 737s in question, and the FAA has issued an air worthiness order directing airlines to immediately inspect the aircraft.

After a daylong meeting with fellow aviation safety officials from around the world, the head of the Federal Aviation Administration is sounding more optimistic about efforts to approve a fix for Boeing's troubled 737 Max, hinting that the FAA could recertify the plane to fly passengers again by as soon as late June.

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In the wake of two crashes of its 737 Max jet in recent months that killed 346 people and grounded those planes worldwide, Boeing continues to produce the planes while campaigning to reassure airlines, pilots, regulators and the flying public that they are safe.

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Many air travelers are breathing a sigh of relief now that the Federal Aviation Administration has grounded all Boeing 737 Max airplanes after two of the aircraft crashed in recent months, but some airline passengers are finding their flights canceled on Thursday as a result.

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The Federal Aviation Administration now faces an awkward question.

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The polar vortex sliding south into the Midwest is sending temperatures to their lowest levels in more than 30 years and, in some cases, setting records.

While it usually sits over the Arctic, the polar vortex is being pushed south by an unseasonably warm air mass to the north.

The life-threatening cold is paralyzing the region — closing schools, businesses and courthouses; grounding flights; and keeping millions confined to their homes.

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