ASN Wikibase Occurrence # 226784
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| Date: | Wednesday 3 July 2019 |
| Time: | 09:35 LT |
| Type: | Cessna TU206F Turbo Stationair |
| Owner/operator: | Aerial Imaging Inc |
| Registration: | N150SC |
| MSN: | U20601958 |
| Year of manufacture: | 1973 |
| Total airframe hrs: | 9736 hours |
| Engine model: | Continental. TSIO-520-M |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Kailua-Kona, Hawaii, HI -
 United States of America
|
| Phase: | Landing |
| Nature: | Survey |
| Departure airport: | Honolulu-Daniel K. Inouye International Airport, HI (HNL/PHNL) |
| Waikoloa Village, HI (HKO) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
After flying for about 3 hours conducting aerial survey work, the pilot noticed a low oil pressure indication in the cockpit. The pilot prepared for a landing at the destination airport. During the approach he heard a bang and the airplane started to shake. He pitched the airplane to maintain the best glide speed and noticed the engine had lost all oil pressure. The pilot prepared for a forced landing to a road, during which the right wing struck a road sign, and the airplane came to rest in a ditch.
Examination of the engine revealed the No. 4 connecting rod crankshaft end and cap separated from the rod and the bolts were sheared. One of the nuts for the connecting rod cap bolts was split and both pieces were recovered. Signatures of high heat on the piston end of all the connecting rods was also noted.
The high heat signatures were consistent with a lack of oil lubrication (and subsequent cooling during operation) for the connecting rods at the crankshaft. The lack of lubrication likely caused the failure of the No. 4 connecting rod crankshaft end and cap, which resulted in a total loss of engine power. The reason for the lack of lubrication could not be determined from available information.
Probable Cause: The total loss of engine power due to the failure of the No. 4 connecting rod crankshaft end and cap.
Accident investigation:
 |
|
Sources:
NTSB WPR19LA185
FAA register: https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=150SC
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Jul-2019 12:34 | Geno | Added |
| 04-Jul-2019 12:37 | RobertMB | Updated [Aircraft type] |
| 02-Jul-2022 07:26 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative, Accident report] |
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