NTSB: Loud pop heard before Danbury helicopter crash

August 15, 2013 5:31:56 PM PDT
We're learning more about a helicopter crash near Danbury last month.

The crash happened during a flying lesson at Salaika Aviation in Brazoria County.

The NTSB's initial report says the flight instructor heard a loud pop, then lost control of the helicopter and crashed.

The two men inside the chopper survived the crash.

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