PPRuNe Forums - View Single Post - PHI Crash in Louisiana Jan 2009 - 8 Dead, 1 Injured
Old 18th Feb 2009, 18:25
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sox6
 
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Sikorsky says:

As an alternative to the use of the Sikorsky approved windshield types, operators with aircraft possessing cast acrylic windshields can attain an equivalent level of impact tolerance by limiting the maximum speed
of the helicopter to no more than 109 knots.
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