NTSB Identification: BFO86FA047.
The docket is stored on NTSB microfiche number 34140.
Accident occurred Sunday, September 14, 1986 in WOODBINE, MD
Probable Cause Approval Date: 02/03/1988
Aircraft: BELLANCA 8GCBC, registration: N53899
Injuries: 2 Fatal.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

WITNESSES OBSERVED THE AIRCRAFT NOSE OVER INTO A DIVE AFTER THE GLIDER IT HAD BEEN TOWING RELEASED. THEY THEN SAW IT ROLL AND DURING THE ROLL THE LEFT WING DEPARTED THE AIRCRAFT. THE CFI IN THE GLIDER HAD OBSERVED THE PILOT OF N53899 PERFORM WHAT APPEARED TO BE A SNAP ROLL ON THE FLIGHT PRIOR TO THE ACCIDENT. ALTHOUGH HE DID NOT SEE THE AIRCRAFT AFTER HE RELEASED FROM N53899, BOTH HE AND HIS STUDENT HEARD ENGINE NOISES SIMILIAR TO THE NOISES THEY HAD HEARD ON THE PRIOR FLIGHT WHEN THEY OBSERVED THE ROLL MANEUVER. REPEATED DETAILED EXAMINATIONS OF THE SEPARATED WING DID NOT REVEAL ANY PRE-EXISTING FAILURE AREAS.

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

AEROBATICS..PERFORMED..PILOT IN COMMAND

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

DESIGN STRESS LIMITS OF AIRCRAFT..EXCEEDED..PILOT IN COMMAND

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