Southwest canceled 40 flights on Sunday to perform inspections in the wake of last weeks fatal engine failure in flight.

Southwest Airlines cancelled about 40 flights Sunday as the airline stepped up efforts to inspect the engines of its Boeing 737 fleet on the heels of last week’s deadly engine explosion on Flight 1380.

The airline voluntarily announced inspections of engines in the CFM56 family – which powers nearly all of Southwest’s fleet – on Tuesday, after a passenger died when she was partially sucked out of an aircraft window that had been shattered in by the engine blast.

Inspectors now believe that the CFM56-7B jet engine failure occurred when one of the engine’s fan blades broke off and came loose. – Time

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