ASN Wikibase Occurrence # 144889
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| Date: | Sunday 1 April 2012 |
| Time: | 15:15 |
| Type: |  Cessna U206B Super Skywagon |
| Owner/operator: | Des Moines Skydivers Llc |
| Registration: | N3830G |
| MSN: | U206-0830 |
| Total airframe hrs: | 6966 hours |
| Engine model: | Continental IO 520 SERIES |
| Fatalities: | Fatalities: 0 / Occupants: 7 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Winterset Municipal Airport - 3Y3, Winterset, IA -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Parachuting |
| Departure airport: | Winterset, IA (3Y3) |
| Winterset, IA (3Y3) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot stated that he departed the airport with six parachutists for a jump flight. As the airplane approached 1,000 feet above ground level, he noticed that the airplane wasn’t climbing. He checked the engine gauges and noticed that the engine analyzer was flashing “CHT” and the cylinder head temperature was 454 degrees F. As the pilot pitched the nose down and turned back to the airport, he heard a muffled “thud” sound and saw white smoke pour from the engine. As he prepared for a forced landing, four of the parachutists jumped from the airplane. The pilot then performed a forced landing in a field, coming to a stop near a dirt berm. An examination revealed a hole in the engine crankcase, near the No. 4 cylinder. Various pieces of metal, including part of a “quick oil drain plug” were found in the engine oil sump. The No. 4 connecting rod journal appeared distorted and displayed extensive heat signatures. The crankshaft journals on either side of the No. 4 rod journals did not appear to be distorted or to contain the same heat signatures and were coated with engine oil. The rod and crankshaft bearings were scored. The signatures on the engine were consistent with the loss of lubricant to the No. 4 connecting rod journal. A reason for the loss of engine oil to the journal was not found.
Probable Cause: The loss of oil pressure to the No. 4 connecting rod journal and the subsequent loss of engine power.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=3830G&x=20&y=10
Location
Images:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 08-Apr-2012 21:11 | Geno | Added |
| 30-Oct-2014 07:02 | jchpa32 | Updated [Narrative, Photo, ] |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 27-Nov-2017 20:34 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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