PHILADELPHIA, PA, USA
N1103K
HUGHES 269C
THE HELICOPTER COLLIDED WITH A STEEL DRAINAGE CULVERT HIDDEN IN THE GRASS AND ROLLED OVER DURING A SIMULATED HIGH ALT RUNNING TAKEOFF. THIS WAS AN INSTRUCTIONAL FLT. THE SKID HIT THE CULVERT WHICH EXTENDED ABOUT 3-4 INCHES AGL, 3 FT OF THE SKID BROKE OFF AND THE HELICOPTER WENT OVER ON ITS BACK. TAKEOFF AREA WAS TO THE RIGHT OF A HARD SURFACE RWY. THE AREA IS 200 FT WIDE WITH DRAINS 2 FT WIDE AND 500 FT APART IN THE CENTER. THE GRASS WAS ABOUT 2 INCHES ABOVE THE DRAIN LIP.
Source: NTSB Aviation Accident Database
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