ASN Wikibase Occurrence # 240392
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| Date: | Saturday 22 August 2020 |
| Time: | 10:51 LT |
| Type: |  Cessna 180 Skywagon |
| Owner/operator: | Casement LLC |
| Registration: | N7620A |
| MSN: | 32517 |
| Year of manufacture: | 1956 |
| Total airframe hrs: | 4446 hours |
| Engine model: | Continental O-470-K |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | SE of Spirit of St Louis Airport (SUS/KSUS), St Louis, MO -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | St Louis, MO (1H0) |
| Fredericktown, MO (H88) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While in cruise flight, the pilot reported hearing a loud 'pop,' and the engine suddenly lost power. The pilot executed a forced landing toward a lacrosse field surrounded by residences. The airplane impacted terrain in a nose-down attitude, which substantially damaged both wings and seriously injured the pilot.
A postaccident examination revealed that the carburetor mixture control cable was disconnected from the carburetor control lever at the carburetor, with the attachment hardware (bolt, nut, and washer stack) still attached to the carburetor. No other anomalies were found that would have precluded normal operation.
Laboratory analysis of the mixture control cable and attachment hardware (bolt, nut, and washer stack) determined that the hardware was used repeatedly in numerous configurations, and the cable did not have a kink at the end indicating it had not been bent. The maintenance manual specified that the cable was to be bent 90 degrees after being threaded through the bolt hole to help secure the cable, and not doing so likely contributed to the cable becoming disconnected from the carburetor control lever inflight.
Probable Cause: A total loss of engine power due to improper maintenance of the mixture control cable and attachment hardware, which led to a forced landing into a congested area.
Accident investigation:
 |
|
Sources:
NTSB CEN20LA360
https://flightaware.com/live/flight/N7620A
FAA register: https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=7620A
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 22-Aug-2020 18:51 | Geno | Added |
| 22-Aug-2020 19:13 | Geno | Updated [Aircraft type, Source] |
| 27-Jun-2022 11:36 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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