The exact cause of last week's plane crash off Miami Beach has not been determined. But the FAA says preliminary investigations have revealed stress fractures in the plane's right wing support.
The seaplane crashed last Monday and sank within sight of luxury high-rises, killing all 20 people aboard. The plane, operated by Chalk's Ocean Airways, crashed after its right wing separated from the fuselage. It was en route to Bimini in the Bahamas.
The FAA has issued a bulletin indicating it may require mandatory inspections of all seaplanes like the 58-year-old Grumman G-73 Turbine Mallard that crashed. Chalk's has voluntarily grounded its four other G-73 aircraft.
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