NTSB Identification: MIA85IA155.
The docket is stored on NTSB microfiche number 28308.
Incident occurred Wednesday, April 24, 1985 in ST. CROIX
Aircraft: GRUMMAN G-73-T, registration: N632SS
Injuries: 1 Minor,5 Uninjured.

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

WHILE ON AN FAA OBSERVED PROVING FLIGHT, WATER TAKE OFF, THE LEFT PROPELLER ELECTRICAL TERMINAL FAILED. THE PART THEN PENETRATED THE LEFT FORWARD PASSENGER WINDOW AND STRUCK THE FAA OBSERVER CAUSING MINOR INJURY. THE PLASTIC PART FAILED IN OVER LOAD DUE TO INADEQUATE DESIGN.

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

PROPELLER SYSTEM/ACCESSORIES,COUNTERWEIGHT..FAILURE,TOTAL

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