ASN Wikibase Occurrence # 225499
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| Date: | Sunday 26 May 2019 |
| Time: | 16:00 LT |
| Type: |  Rand Robinson KR-2S |
| Owner/operator: | Private |
| Registration: | N886MJ |
| MSN: | 9425-886 |
| Year of manufacture: | 2004 |
| Total airframe hrs: | 667 hours |
| Engine model: | General Motors Corp Corvair |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | near Beloit Road, about 1.7 NM southeast of Argyle, Boone County, IL -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Poplar Grove, IL (C77) |
| Freeport-Albertus Airport, IL (FEP/KFEP) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Shortly after departure, the pilot smelled oily smoke and noted a loss of engine oil pressure and an increase in oil temperature. The engine lost power, and the pilot performed a forced landing to a corn field. During the landing, the nosewheel dug into the field and the airplane nosed over, resulting in substantial damage to the wings and vertical stabilizer.
An examination of the engine revealed no mechanical anomalies that would preclude normal operations. The source of the oil leak was not identified.
The pilot later reported that, after researching and consulting with other pilots who operated the engine type installed on the accident airplane, he believed that the loss of engine power was the result of vapor lock in the throttle body injection (TBI) system. His research indicated that other airplane owners provide 'blast cooling' on the TBI to fix the issue. The pilot said that the vapor lock issue likely started at the same time as the engine heated up due to the extra lean mixture. He added that the rear seal might leak and spray oil on the exhaust pipe. He stated that enriching the mixture might have corrected the issue inflight.
Probable Cause: The loss of engine power due to vapor lock of the throttle body injection system.
Accident investigation:
 |
|
Sources:
NTSB CEN19LA152
FAA register: https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N886MJ
Location
Media:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-May-2019 05:52 | Buckeroo44 | Added |
| 27-May-2019 06:38 | RobertMB | Updated [Time, Aircraft type] |
| 27-May-2019 07:44 | RobertMB | Updated [Aircraft type, Registration, Cn, Operator, Location, Departure airport, Destination airport, Source, Narrative] |
| 27-May-2019 12:07 | Iceman 29 | Updated [Embed code] |
| 27-May-2019 13:27 | Geno | Updated [Source] |
| 02-Jul-2022 09:02 | ASN Update Bot | Updated [Time, Cn, Other fatalities, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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