ASN Wikibase Occurrence # 43497
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| Date: | Friday 9 August 1996 |
| Time: | 17:22 LT |
| Type: |  Aeronca 11AC |
| Owner/operator: | Registration Pending |
| Registration: | N85825 |
| MSN: | 11AC-234 |
| Total airframe hrs: | 1505 hours |
| Engine model: | Continental A-65-8F |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Charlotte, MI -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | , MI (07G) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot had just completed a fly-by down the runway, when the engine had a partial loss of power. Subsequently, the airplane entered a spin and impacted the ground in a steep descent. Control continuity was established. Airframe and engine inspection did not reveal any discrepancies. A witness reported that the airplane was flown down the runway at 90 to 100 mph, at a low power setting, followed by a pull up at the end of the runaway. Bendix Aircraft Carburetor Service Bulletin Number 74 reported that this type of maneuvering, along with an abrupt throttle movement may cause the engine to lose power or quit. The accident airplane's carburetor was not equipped with an accelerator pump. The temperature and dew point were reported to be 77 and 49 degrees, respectively. According to icing probability charts, conditions were conducive to carburetor icing. The carburetor heat control knob was found in the 'off' position.
Probable Cause: the pilot's improper use of engine controls (carburetor heat and/or throttle), while making a relatively high speed approach, low pass, and pull-up, which resulted in partial loss of engine power; and failure of the pilot to maintain sufficient airspeed after the partial loss of power, which resulted in an inadvertent stall/spin. The lack of an accelerator pump in the carburetor may have been a related factor.
Accident investigation:
 |
|
Sources:
NTSB CHI96FA290
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 05:03 | ASN Update Bot | Updated [Time, Other fatalities, Phase, Departure airport, Source, Narrative, Category, Accident report] |
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