Southwest to cancel about 100 flights as inspections continue

Hole forces a Boeing 737 to landSTORY HIGHLIGHTSA hole opened on top of a Boeing 737 during flightDuring inspections, investigators find indications of cracks in three other aircraftThe inspections are expected to be complete on TuesdayBoeing declines to comment on the possible cause of the incident (CNN) -- Southwest Airlines expects to cancel about 100 flights from its Monday schedule as investigators continue inspecting its fleet, the airline said.

The Texas-based airline grounded 79 planes for inspection after a hole opened on top of a Boeing 737 mid-flight Friday.

It canceled approximately 600 flights to accommodate the inspections: 300 on Saturday and 300 flights on Sunday.

So far, investigators have found indications of cracks in three other aircraft, the National Transportation Safety Board said Sunday.

Of the planes inspected, 19 had returned to service by Sunday afternoon, the airline said.

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