ZEPHYRHILLS, FL, USA
N8390F
HUGHES 369HS
A WITNESS STATED THAT SHE HEARD THE ENG ON THE HELICOPTER QUIT. SHE LOOKED OUT HER WINDOW AND WATCHED THE HELICOPTER HIT THE GROUND, BOUNCE, HIT AGAIN, FLIP OVER AND THE TAIL BROKE OFF. THE HELICOPTER THEN BURST INTO FLAMES AND EXPLODED.EXAM OF THE ENG REVEALED THAT THE PC AIR FILTER ASSEMBLY WAS BROKEN AT THE FORWARD INLET SIDE OF THE FILTER BODY WHICH RESULTED IN THE LOSS OF PC AIR PRESSURE TO THE FUEL CONTROL.THIS CAUSED THE ENG POWER TO REDUCE TO FLIGHT IDLE. THE PC FILTER HOUSING BROKE DUE TO AN IMPROPER MODIFICATION TO THE FILTER BODY.
Source: NTSB Aviation Accident Database
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