ASN Wikibase Occurrence # 43170
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| Date: | Saturday 17 September 1994 |
| Time: | 10:30 LT |
| Type: |  Alon A-2 Aircoupe |
| Owner/operator: | Joseph Wyser |
| Registration: | N37698 |
| MSN: | A-173 |
| Engine model: | CONTINENTAL C85-12F |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Orland, CA -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | (O37) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING A LOCAL AREA PERSONAL FLIGHT, THE PILOT PERFORMED AN AEROBATIC MANEUVER. NO ONE OBSERVED THE ACTUAL MANEUVER; HOWEVER, ONE WITNESS SAW THE AIRPLANE SECONDS PRIOR TO THE CRASH, AND HE INDICATED THE AIRPLANE WAS FALLING 'LIKE A ROCK.' THE OUTBOARD 3-FOOT-LONG PORTION OF THE LEFT WING WAS FOUND IN AN OPEN FIELD ABOUT 200 YARDS FROM THE MAIN WRECKAGE. PRIOR TO THE PILOT'S TAKEOFF, HE HAD INFORMED AN ACQUAINTANCE THAT HE PLANNED TO 'DO SOME ROLLS.' A WEEK EARLIER, THE PILOT TOLD HIS WIFE THAT HE WANTED TO TRY TO ROLL HIS AIRPLANE. THE PILOT HAD NOT RECEIVED AEROBATIC FLIGHT TRAINING, AND THE AIRPLANE WAS NOT CERTIFICATED TO PERFORM ROLLS. EXAMINATION OF THE LEFT AILERON AND LEFT WING STRUCTURE REVEALED PERMANENT DEFORMATION IN AN UPWARD (POSITIVE) DIRECTION. FAA AIRWORTHINESS AND CERTIFICATION OFFICE PERSONNEL REPORTED NO SIGNS OF A DEVELOPING OR PREEXISTING CONDITION WHICH INDUCED FAILURE OF THE SEPARATED LEFT WING TIP.
Probable Cause: the pilot's intentional performance of an aerobatic maneuver which overloaded the outboard portion of the left wing and caused it to fail. Factors which contributed to the accident were the pilot's overconfidence in his ability to perform the maneuver and his lack of experience or training in aerobatics.
Accident investigation:
 |
|
Sources:
NTSB LAX94FA367
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:24 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 09-Apr-2024 19:15 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Source, Narrative, Category, Accident report] |
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