ASN Wikibase Occurrence # 186883
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| Date: | Saturday 30 April 2016 |
| Time: | 10:57 |
| Type: |  Aeronca 7BCM (L-16A) |
| Owner/operator: | Commemorative Air Force |
| Registration: | N7620B |
| MSN: | 7BCM-384 |
| Year of manufacture: | 1947 |
| Total airframe hrs: | 1600 hours |
| Engine model: | Continental C85-8F |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Fayette County, east of Tyrone, GA -
 United States of America
|
| Phase: | Landing |
| Nature: | Executive |
| Departure airport: | Peachtree City, GA (FFC) |
| Peachtree City, GA (FFC) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The airline transport pilot was conducting a revenue sightseeing flight with one passenger onboard. During cruise flight, while the airplane was level at 3,000 ft mean sea level, the engine began to lose power. The pilot applied carburetor heat with no improvement; the engine speed remained at 2,000 rpm. He then turned the carburetor heat off and checked the magnetos and noted no significant change in performance. He then reapplied carburetor heat with no improvement; the pilot left the heat on for the remainder of the flight. The airplane would not maintain altitude, so he conducted a forced landing in a grass field. After touchdown, the airplane nosed down in high vegetation, and the main landing gear collapsed. The airplane sustained structural damage to the forward fuselage and engine firewall.
Postaccident examination of the airframe and engine revealed no evidence of preimpact mechanical failures or malfunctions that would have precluded normal operation, and there was sufficient fuel onboard at the time of the accident. Although the weather conditions at the time of the accident were conducive to serious carburetor icing at glide power, the pilot applied carburetor heat twice, which should have melted any existing ice, but power was not restored. Therefore, the investigation could not determine the reason for the partial loss of engine power.
Probable Cause: A partial loss of engine power during cruise flight for reasons that could not be determined because postaccident examination of the engine revealed no anomalies that would have precluded normal operation.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=7620B
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 01-May-2016 01:23 | Geno | Added |
| 01-May-2016 01:24 | Geno | Updated [Narrative] |
| 21-Dec-2016 19:30 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 19-Aug-2017 15:08 | ASN Update Bot | Updated [Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative] |
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