NTSB Identification: ATL84LA212.
The docket is stored on NTSB microfiche number 24634.
Accident occurred Saturday, June 30, 1984 in GRENADA, MS
Aircraft: CESSNA 172G, registration: N4650L
Injuries: 1 Minor.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

DURING ARRIVAL TO AN UNCONTROLLED ARPT, THE PLT MADE AN APCH WHILE FOLLOWING ABOUT 1/4 MI BEHIND A UH-1 HELICOPTER. AT THAT TIME, THERE WAS A QUARTERING HEAD WIND AT ABOUT 4 KTS. WHILE ON FINAL APCH AT AN ALT OF ABOUT 200 FT AGL, THE CESSNA 172 ENCOUNTERED SEVERE TURBULENCE & THE PLT WAS UNABLE TO MAINTAIN FLT. WITNESSES REPORTED THAT THE CESSNA WENT NEARLY INVERTED AFTER ENCOUNTERING WAKE TURBULENCE FROM THE HELICOPTER. THE CESSNA IMPACTED THE GROUND ABOUT 500 FT SHORT OF THE RWY & WAS DAMAGED. THE PLT STATED THAT HE WAS NOT AWARE THAT HELICOPTERS PRODUCED WAKE TURBULENCE. THE AIM ADDRESSES HELICOPTER DOWNWASH & ROTOR VORTICES.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

PLANNED APPROACH..IMPROPER..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

CLEARANCE..INADEQUATE..PILOT IN COMMAND

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