NTSB Identification: MIA88LA121.
The docket is stored on NTSB microfiche number 35995.
Accident occurred Monday, March 07, 1988 in MIAMI, FL
Probable Cause Approval Date: 02/28/1989
Aircraft: SCHLEICHER K-8B, registration: N4663S
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 PLT STATED THAT HE HAD PLACED THE GLIDER INTO A MILD DIVE & WAS INDICATING 90 TO 95 MPH, WELL BELOW REDLINE SPEED WHEN THE WHOLE SECTION OF THE TRAILING EDGE OF THE WING FROM THE AFT SPAR & WING ROOT OUT TO A DIST OF ABOUT 6 FT, SEPARATED FROM THE ACFT. THE PLT WAS ABLE TO LAND WITHOUT FURTHER INCIDENT. ALTHOUGH MOST OF THE FAILED PIECES FELL FROM THE ACFT & WERE NOT RECOVERED, AN EXAM OF THE WING ROOT RIB REVEALED THAT IT HAD FAILED. THE WING SPOILER ATTACH BRACKET FOR THE SPOILER BELLCRANK IS ATTACHED TO THE FAILED RIB. THE PLT STATED THAT THE SPOILERS FLEW OPEN INADVERTENTLY DURING OR IMMEDIATELY AFTER THE FAILURE OCCURRED. THE REASON FOR THE FAILURE COULD NOT BE DETERMINED. THE ACFT IS CONSTRUCTED ENTIRELY OF WOOD.

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

WING,WING RIB..FAILURE,TOTAL

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