NTSB Identification: ATL95FA078.
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Accident occurred Saturday, April 08, 1995 in COVINGTON, TN
Probable Cause Approval Date: 09/24/1995
Aircraft: PIPER PA-34-200T, registration: N6390C
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.

THE COMMERCIAL PILOT WAS MAKING WHAT WAS REPORTED TO BE HIS LAST FLIGHT IN THE AIRPLANE, BECAUSE HE WAS TAKING A JOB AS A COMMUTER PILOT. A CFI, WHO TALKED WITH THE PILOT BEFORE DEPARTURE, REPORTED THAT THE PILOT SAID HE WAS GOING TO 'ROLL THE AIRPLANE.' WITNESSES REPORTED THAT THE RIGHT WING FOLDED BACK, WITH A LOUD BOOMING NOISE. NO INFLIGHT SMOKE OR FIRE WAS REPORTED. AN EXAMINATION OF THE WRECKAGE REVEALED THAT THE LEFT STABILATOR FAILED IN POSITIVE OVERLOAD (FAILED DOWN). THE RIGHT WING FAILED AT THE WING ROOT, AND ALSO OUTBOARD OF THE RIGHT ENGINE. THE LEFT WING FAILED OUTBOARD OF THE LEFT ENGINE. WING SPAR EXAMINATION REVEALED THAT THERE WAS UPWARD (POSITIVE) BENDING, BUT FAILURE WAS IN THE DOWNWARD DIRECTION. ALL FRACTURE SURFACES SHOWED EVIDENCE OF OVERLOAD; THERE WAS NO EVIDENCE OF FATIGUE OBSERVED. THE PILOT'S OPERATING HANDBOOK INCLUDES THE LIMITATION THAT ALL INTENTIONAL AEROBATIC MANEUVERS ARE PROHIBITED IN THIS AIRPLANE.

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

THE PILOT EXCEEDED THE DESIGN STRESS LIMITS OF THE AIRCRAFT AND SUBSEQUENT OVERLOAD FAILURES OF THE STABILATOR AND WING SPARS.

Full narrative available

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