NTSB Identification: ATL87LA175.
The docket is stored on NTSB microfiche number 34259.
Accident occurred Friday, June 19, 1987 in MYRTLE BEACH, SC
Probable Cause Approval Date: 10/07/1988
Aircraft: PIPER PA-25, registration: N6078Z
Injuries: 1 Uninjured.

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

THE ACFT ENCOUNTERED A STRONG DOWNDRAFT IN A THUNDERSTORM AND IMPACTED THE WATER DURING A BEACHSIDE BANNER TOWING OPERATION. THE PLT REPORTED THAT HE HAD OBSERVED THUNDERSTORMS DEVELOPING INLAND ABOUT 1/2 HR PRIOR TO THE ACCIDENT AND THAT HIS ACFT WAS 'OVERTAKEN' BY THE STORMS BEFORE HE COULD RETURN TO HIS BASE. HE ADDED FULL POWER AND RELEASED THE BANNER WHEN HE ENCOUNTERED THE DOWNDRAFT, BUT WAS UNABLE TO ARREST THE HIGH SINK RATE THAT DEVELOPED. THE PLT WAS ASKED IF HE WAS FAMILIAR WITH THE THUNDERSTORM AVOIDANCE PROCEDURES RECOMMENDED IN THE AIRMAN'S INFORMATION MANUAL. THE PLT REPLIED THAT HE WAS AWARE OF THEM, BUT THAT HE COULDN'T SHUT DOWN BANNER TOWING OPERATIONS JUST BECAUSE A THUNDERSTORM WAS WITHIN 10 MILES OF HIS OPERATIONS AREA.

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

IN-FLIGHT PLANNING/DECISION..IMPROPER..PILOT IN COMMAND

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

FLIGHT INTO KNOWN ADVERSE WEATHER..ATTEMPTED..PILOT IN COMMAND



Contributing Factors

WEATHER CONDITION..DOWNDRAFT


Contributing Factors

WEATHER EVALUATION..POOR..PILOT IN COMMAND

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