ASN Wikibase Occurrence # 177577
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| Date: | Saturday 4 July 2015 |
| Time: | 14:20 |
| Type: |  Aeronca 7BCM/L-16 Champ |
| Owner/operator: | Private |
| Registration: | N10497 |
| MSN: | 47-934 |
| Year of manufacture: | 1947 |
| Engine model: | Continental C90-8F |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | North Shore Country Club, Portland, TX -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | Ingleside, TX (TFP) |
| Ingleside, TX (TFP) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
A witness reported seeing the airplane flying “right over the rooftop” of a home before turning along the shoreline at an altitude of 20-50 ft above the ground. He initially thought the airplane was going to land. The witness then observed the airplane climb straight up into a loop maneuver, roll inverted, then descend nose-first into the ground. Another witness said the airplane did 3-4 “wing waves” before it completed ½ of a loop, then descended straight down. A postaccident examination of the airframe and engine revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation. The impact damage to the airplane was consistent with a stall/spin, which resulted from the airplane exceeding its critical angle of attack during the attempted loop.
Toxicological testing revealed the presence of several impairing substances, including alcohol, opiod medication (hydrocodone), a benzodiazepine (alprazolam), as well as evidence of withdrawal from cocaine. The pilot was likely significantly impaired by the combination of these substances, and this level of impairment contributed to his poor decision-making, as well as his inability to safely operate the airplane.
Probable Cause: The pilot’s ostentatious low-altitude aerobatic display, which resulted in an aerodynamic stall/spin when he exceeded the airplane’s critical angle of attack. Contributing to the accident was the pilot’s impairment due to alcohol and drugs.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N10497
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Jul-2015 22:13 | Geno | Added |
| 06-Jul-2015 15:45 | Geno | Updated [Aircraft type, Registration, Cn, Operator, Source, Damage] |
| 16-Jul-2015 03:06 | Geno | Updated [Time, Phase, Nature, Source] |
| 21-Dec-2016 19:30 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 14-Mar-2017 07:24 | PiperOnslaught | Updated [Departure airport, Source, Narrative] |
| 19-Aug-2017 13:53 | ASN Update Bot | Updated [Other fatalities, Destination airport, Source, Narrative] |
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