NTSB Identification: BFO94LA099.
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Accident occurred Tuesday, June 14, 1994 in CHURCHTOWN, OH
Probable Cause Approval Date: 07/24/1995
Aircraft: UPTON MUSTANG II, registration: N49YP
Injuries: 2 Fatal.

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 AIRPLANE WAS OBSERVED ENTERING AN AEROBATIC MANEUVER SIMILAR TO A TAIL SLIDE. DURING THE MANEUVERING, AN IN-FLIGHT BREAKUP OF THE AIRPLANE OCCURRED. PIECES OF THE AIRPLANE WERE FOUND OVER AN 1800' AREA. AN EXAM OF THE WRECKAGE REVEALED THAT THE CANOPY HAD SHATTERED; THE RIGHT HORIZONTAL STABILIZER, RIGHT ELEVATOR, LEFT AILERON, CANOPY FRAME & PASSENGER'S BODY HAD SEPARATED FROM THE MAIN WRECKAGE. THERE WAS EVIDENCE OF DOWNWARD DEFORMATION ON THE SEPARATED STABILIZER & ELEVATOR. ALSO, EVIDENCE OF A PREEXISTING CRACK WAS FOUND IN THE CANOPY LATCH MECHANISM, BUT THE INVESTIGATION DID NOT DETERMINE WHETHER THE LATCH HAD FAILED BEFORE OR AFTER THE IN-FLIGHT BREAKUP HAD BEGUN. THE AIRPLANE KIT MANUFACTURER DISCOURAGED TAIL SLIDES.

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

THE PILOT'S PERFORMANCE OF A MANEUVER THAT EXCEEDED THE DESIGN STRESS LIMITS OF THE AIRPLANE.

Full narrative available

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